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Are there any Honda engines that are non interference? Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. However, when you own a vehicle, you must know its features. Then in 1964, that engine was also overboard to a 289, and then a few short years later, the 289 was stroked to a 302. 2.2L Diesel Interference meaning, do the valves come far enough down into the combustion chamber that they overlap where the piston raises to before detonation (meaning they could be bent/shattered by the piston in the event of a timing chain failure)? Privacy Statement - Oil leaks are one of the most common problems with the 4.0L V6 Ford engine. An "interference" engine is an engine which the failure of the timing chain would cause damage to either the pistons or the valves, due to. Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet. The standard 5.0 ratings in the LX and GT were lowered to 205 horsepower and 275 lb-ft of torque. If you see an oil leak, its best to get it fixed as soon as possible to avoid any further damage to your engine. This is the definition of an interference engine: the valves, when fully open, extend into the cylinder area. This timing chain cassette can be replaced without having to pull the engine out of the vehicle. First, you can check your owners manual. However, this also means that there is less room for error when it comes to maintaining proper timing between the pistons and valves. First, its a very reliable engine that is known for its durability. If the timing chain or timing belt breaks or gets loose, it will skip a few teeth on the crank gear or cam. Interference Engines - Complete List The following list will provide you the information on whether your car engine is an interference engine or a non-interference engine. If youre considering a vehicle with a 4.0 engine, its important to know the difference between the SOHC and DOHC versions. Life is so much nicer with the engine on the stand or as we did it, resting on the floor with a 4X4 under the high point of the pan, then tilt the engine back onto long tranny bolts. The cookie is used to store the user consent for the cookies in the category "Performance". 1.8L 4 Cyl. However, the Zetec ACTS as a freewheeling engine, given that Ford put recessed pistons in the engine to give the valves clearance to be fully extended and the crank can turn without the cams without damage to the pistons or valves. This website uses cookies to improve your experience while you navigate through the website. Interference engines are common among the latest automotive models. The rest of Ford's powerplants rely on timing chains to keep the camshaft and valves moving. Non-Interference All Honda engines are interference except 3.0L & 3.2 which are Non-interference 1.8L 4 Cyl. However, Ford EcoBoost 4.6L engines are classified into one of two categories: conventional or non-interference. And for one final tidbit of random information, there were roughly 10,000 of these engines shipped to Ford of Australia to be used in its Falcon line. What are the benefits of using a vibrating exercise machine? Moreover, its valves are completely open and extend into areas through which the piston can travel. If you suspect ignition coil failure, its best to replace all coils at once rather than just one at a time. 1.5L Interference A single-snorkel air-cleaner was used and new for 1979 was an aluminum water pump and a single v-belt accessory drive belt. The cylinder heads were also revised and had a casting number of E7TE. This cookie is set by GDPR Cookie Consent plugin. 3.4L Non-Interference Additionally, interference engines typically have better fuel economy due to their higher compression ratios. Many car enthusiasts consider the 4.0 L V6 to be one of the best engines available on the market today. Remove the oil filter housing and dipstick tube. However, they are not as durable or efficient as interference engines. 1.6L SOHC (Nova) Non-Interference 3.5L SOHC Interference Just clear tips and lifehacks for every day. If the cam phasers can cause the valves to hit the piston if tuned wrong, then it has to be an interference engine in the first place. 1.8L Diesel Interference tappet cam. Besides, it always pays to know. is 302 an interference engine? The torque output is 250 lb-ft at 4250 rpm. 2.0L Non-Interference With Ford, generally anything with a chain is gonna be interference. The latest vehicle models feature interference engines. 2.5L Non-Interference When to know if your car has an interference engine? Hello, Today my engine went kaput in my '75 Lincoln. 2.5L 4 Cyl. Trucks/SUVs, yes. An interference engine is one that has insufficient clearance between the valves and pistons if the cam stops turning due to a broken timing belt. 3.3L 3MZ-FE V6 W/ V VTi Interference Member since Apr 2021. While still very debatable, the power improvement over the 1993 engine was primarily from airflow improvements. Non-interference engines on the other hand do not share the same powertrain components with normally aspirated, non-interference. Timing chain warns the driver unlike timing belts. Analytical cookies are used to understand how visitors interact with the website. These cookies help provide information on metrics the number of visitors, bounce rate, traffic source, etc. It pays to know. For the 1983 Mustang, the five-liter engine received a 4-barrel Holley 600 cfm carb which allowed for an additional 18 horsepower. 1.8L Non-Interference 5.0Resto, SVE, LMR are registered trademarks of Latemodel Restoration Supply, Inc. Ford, SVT, Special Vehicle Team, Ford Mustang, Ford Lightning, Mach 1, Mach-E, Shelby GT500, GT350, GT350R, New Edge, Boss 302, 5.0, Cobra R, Fox Body Mustang, Ghia, Turbo GT, SVT Cobra, Cobra Jet, Bullitt, California Special, Cobra, GT, V6, S197, SN95, S550, S650, Dark Horse, F-Series, F-150, Triton, F150 Raptor, Raptor, EcoBoost, Bronco, Bronco Sport, Badlands, Big Bend, Black Diamond, Outer Banks, Wildtrak, and Sasquatch are all registered trademarks of Ford Motor Company. Late Model Restoration has no affiliation with Ford Motor Company, Roush Enterprises, Eaton, or Saleen. Since we specialize in 1979 to present Mustang restoration and performance parts, we're going to talk about the history of the push rod 302 from 1979 to 1995. The "7F29" casting date code means June 29, 1967 at Ford's Cleveland foundry. Is the 302 in / 5.0 Liter an interference engine? Unfortunately, this scenario can damage the valves. The short block featured a redesigned forged piston with a 30-thousandths deep dish and valve reliefs which netted a 9:1 compression ratio. 3.0L 944 Interference Joel. The cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. (That is, as soon as the temperature here gets into the 40 zone again.) The timing chain on the 4.0 SOHC engine is made of metal links that are connected to each other with rivets. For 1985, the first roller-cammed 5-liter engine was offered. Come to think of it, Ive never seen a 302 in. If there is a gap between the valves and the pistons, the engine is called a non-interference engine. 1.3L Interference It featured a Motorcraft carb which was rated at 368.5 cfm and the intake manifold was cast aluminum. Interference engines, also known as "destructive head" engines are the ones that have little clearance between the valves and pistons and if the cam stops turning as a result of broken timing belt or chain, the valve (s) will bend or break. In this video, Landan goes over everything you need to know about the small block Ford 302 engine for 79-95 Mustangs. There is a sound coming from the engine that sounds like it could be the timing chain slapping the timing cover but I don't know. Late-1985 CFI-equipped engines received a bump in power to 180 horsepower and 260 lb-ft of torque. If youre tracking down a wiring issue, Eautorepair.net is the better choice. Torque remained the same at 245 lb-ft. One other minor change on the CFI version of the 302 was the use of a cast-iron intake manifold versus the dual-plane aluminum manifold on the non-CFI engine. 2.2L Diesel Interference Reply Like # 2 Aftermarket Products, Reviews & Installation, Suggestions, Comments & Questions about the Forum, Send a private message to flareside_thunder, 2006 F150 5.4 Sputtering - New thread CONDENSED, Do Not Sell or Share My Personal Information. The modular motors are certainly interference engines. Lastly, these valves extend to any area through which the piston may travel. If you suspect that your timing chain may need to be replaced, its best to take your vehicle to a qualified mechanic or Ford dealership for diagnosis and repair. 2.2L Interference Does the 4.6 have cam phaser problems? 1.3L Interference This engine was a direct result of Fords efforts to meet the ever more stringent CAFE requirements for fuel mileage. Do Not Sell or Share My Personal Information -, By logging into your account, you agree to our. They should have cut reliefs in the pistons for valve clearance of course. . It doesnt have to be a brand new engine. This means that there are two types of engines in this regard: interference and non-interference engines. Do you need underlay for laminate flooring on concrete? 3 Is the 4.0 L SOHC an interference motor? The Coyote had to remain the same size as the outgoing 4.6-liter V8. The 5. Roush is a registered trademark of Roush Enterprises Inc. Eaton is a trademark of the Eaton Corporation. 1.5L Stranda Interference 2.2L Diesel Interference 3.5L DOHC Interference, 2.5L Non-Interference What Is a Hemi Engine? Scroll down . On the contrary, a non-interference engine does not allow the piston to travel into any area where the valves open. These cookies ensure basic functionalities and security features of the website, anonymously. S60 Interference However, if youre looking for better fuel economy, the SOHC version may be a better choice. That saves a lot of time because you dont have to refer back to the component locator or circuit locations. Registered. It is a DOHC engine with 24 valves and produces 250 horsepower at 6000 rpm. This is a big job, but it can be done without pulling the engine. The short block featured flat-top pistons without any valve reliefs. This engine was first engineered for the Mustang GT so it could compete with the GM 6.2L LS3 engine used in the Chevrolet Camaro at the time. 1.7L Non-Interference 1.6L (Tracker 16 Valve) Interference I Got A 1996 Ford 5.0 302 Engine Out Of A Explorer U Can Hear It Run Its All.complete With Transmission Good For A Hot.rod. The 4.0 engine was used in a variety of vehicles, including the Ford Explorer, Ranger, and Mustang. 1970 Ford Mustang Boss 302. If a valve and piston collide, serious engine damage will occur. The 4-barrel carb came with a redesigned automatic choke and was rated at 165 horsepower, which was 10 less than the manual. It has a cast iron block and aluminum heads and uses regular unleaded gasoline. Interference engines are common among the latest automotive models. So, when the timing sprocket or chain breaks, the cam stops, and the pistons still moving at speed, start hitting opened valves. . However, if something goes wrong and the piston does come into contact with a valve, it can be bent or break it. It was only available in the 2wd models that first year, and had 210 hp and 280 ft-lb of torque. Yes, all 289/302/351 engines that I know of are definitely interference. Fortunately, the 4.0L SOHC is not an interference engine so a timing chain failure wont bend the valves. Not so with a non-interference engine. Overall, the Ford 4.0 V6 is an excellent choice for a car or truck engine. Is the Ford 4.6 L an interference engine? Free shipping-ENGINE REBUILD KIT- 1968-1984 . Thanks for the welcome. $600. 1.8L 7AFE, 4AFE, 4AF Non Interference 2.0L SOHC Gasoline (Capri, Pinto & Ranger) Non-Interference All Honda cars from 1984 through 1996 have interference engines. 2.4L SOHC Interference What are some interference engines made by Ford? 2.5L V6 Non-Interference The original Escort was powered by a 1.6L 4 cylinder, 69 horsepower engine with a two barrel carburetor. Belt driven engines like some of the 4 cylinders are not interference, but the valves will still hit if the belt breaks at 6000 rpm (Zetec for example). The Ford small-block V8 design work originally began in 1960. Non-Interference 3.0L SOHC 12 Valve Engine Non-Interference An interference engine is one that has insufficient clearance between the valves and pistons if the cam stops turning due to a broken timing belt. 4.7L 928 Interference The Ford Mustang comes with one of three engines a 4.0-liter V6 that makes 210 horsepower and 240 pound-feet of torque, a 4.6-liter V8 that makes 300 horsepower and 320 pound-feet of torque and a 5.4-liter V8 that makes 500 horsepower and 480 pound-feet of torque. If there isnt much clearance, its likely that your engine is interfering. Be careful not to damage the gasket surfaces when doing this. 3.6L Intereference, 1.0L Interference For all of its minor quirks, the Coyote-equipped generation is one of the best used Mustangs available. It was a 4.2-liter or 255 cubic inch variant of the 302 which had a smaller bore of 3.68 inches. Alternative Views: ****A $410.00 core charge will be added during checkout****. (200 hp @ 4000 rpm) had flat top pistons, and higher lift cam. Talk about your 8th and 9th generation Ford F150 trucks. How To Know if you have a Timing Belt or a Timing Chain Watch on Audi 1.8L 1.9L Interference 2.8L V6 90 100 Quattro A4 A6 Interference BMW 2.5L 325I 525I Interference 4.0L 740I Interference Acura This means that more air and fuel can be compressed into the cylinders, resulting in a more powerful explosion when combusted. These cookies will be stored in your browser only with your consent. The video below will also help you determine if your car has a timing belt or chain. The new 5.0 carried an H.O. Alldatadiy.com offers redrawn diagrams as well as factory diagrams. Chains are longer lived than most timing belts, and there are no recommended chain replacement intervals published by Ford for these engines. In Canada, Ford had a V8 engine in 1956 and called it the Y-Block, based on the flathead design that was used a decade earlier. 1.6L 124 Series Interference It should say somewhere whether or not your engine is interfering. All rights reserved. Website content, text, & images Copyright 2023 LMR.com - All Rights Reserved. Eliseo Carrillo (7) offer up reviews. Ignition coils are responsible for providing a spark to the spark plugs, so if they fail, your engine will have difficulty starting or running smoothly. You can also have your vehicle checked for cylinder damage. The fastest Ford engine is the GT supercar, with an incredible 740HP. Chassis dynos proved these flywheel ratings were mediocre! The video below will also help you determine if your car has a timing belt or chain. Alternatively, you can take off the timing belt cover and look at how much clearance there is between the valves and pistons. The 4.0 OHV was also used in some Mazda trucks and SUVs. On the other hand, interference engines have a short space between the pistons and valves and when the . Which is Better Interference Or Non-Interference Engine? For those of you that are thinking, that the 302 came way before 1979 trust us, we know that. In thinking about this situation, the 302 might go either way on the freewheeling issue. With an interference engine, a malfunctioned timing belt can cause the pistons to strike the valves. The Ford 4.0 engine is a V6 engine that was first introduced in the 2006 model year. The camshaft was taken from a 351 Windsor engine that Ford used in their Torino and a double-roller timing chain replaced the previous silent-link chain. 240DL 2.3 Non-Interference Factory diagrams are much harder to read. (B2300) Non-Interference 2.5L 4 Cyl. The camera will be inserted through the spark plug hole. The size zero (0) rating of the Kei class was instituted as a tax preference but also provided recognition that the small cars met Japans strict guidelines for road handling and safety. This means that if the timing belt snaps, the valves, and pistons will collide. 1.8L DOHC Interference 1-8. . 1.6L DOHC (1989-92 Prizm GSI) Non-Interference 5.7 Hemi Intereference, 1.3L 128 Series Interference These leaks can come from a variety of places, including the oil pan gasket, front crankshaft seal, and rear main seal. Thus, being placed so high, the piston can never interfere with the valves. But like any engine, its not without its problems. If your 4.0 SOHC engine is making noise, it could be an indication that the timing chain needs to be replaced. The short answer is yes, This is Ford 4.0 An Interference Engine. We also use third-party cookies that help us analyze and understand how you use this website. Pretty rare for a timing chain to flat out break. These leaks can cause a loss of power and decreased fuel economy. 5.4L 928 Interference, DOHC Interference If you don't need the performance of a stroker and just need a reliable 302 Ford crate engine, look no further. When timing belt or timing chain snaps occur and the cam stops as a result, the engine remains intact, hence you only need to change the timing chain or belt. 1.6L SOHC Interference We also use third-party cookies that help us analyze and understand how you use this website. In 1979, the 5.0-liter engine was a carry-over from the 1978 Mustang 2. 2.3L 4 Cyl. He is a professional car buyer and consumer advocate working closely in the industry to improve the buyers experience. The firing order was also changed from 1-5-4-2-6-3-7-8 to the 351 Windsor sequence of 1-3-7-2-6-5-4-8 which we have detailed in the image below: The cylinder heads were larger than those of the 4.2-liter and most people referred to this as normal 5.0 intake ports. Saleen is a registered trademark of Saleen Incorporated. 2.3L Diesel Interference 1.9L Ecotec SOHC Intereference Check out our YouTube channel for even more tech tips, installation videos, how-tos, and more. This cylinder head was used on LX and GT Mustangs until the retirement of the Fox Body Mustang in 1993. If Im going to spend the big bucks, it will go toward an engine that does better than 185 Hp, and 10 mpg for sure. What is your definition of an interference engine? If the cylinders and pistons are in place, but several valves are bent, there might not be any need to replace or rebuild the entire engine. However, to keep this article from getting too long-winded and boring you to death, we're going to cover some of the higher-level changes throughout the 1979 to 1995 era. 2.5L SOHC 4 Cyl. Reviewers love the 4.6-liter V8. Ford used its 2.0-liter engine in the 1993 to 1998 Probe, its 2.2-liter engine in the 1985 Ranger truck, and its 2.0-liter engine in the 1986 to 1988 Ranger. SOHC Non-Interference, 1.3L DOHC Interference 6 What makes a car an interference or non interference engine? The Ford 4.0 an Interference Engine, meaning that the valves and pistons share the same space in the cylinder head. 2007 GT: JLT intake, SCT tuner, Eibach Pro-kit (springs + struts/shocks), Currie Adjustable LCA's with Johnny Joint, BMR relocation brackets, MAC axleback exhaust, Powerslot rotors . Moreover, these valves extend to any area through which the piston may travel. This can cause major engine damage and is why its so important to keep the timing belt in good condition and replace it every 60,000 miles or so. However, you may visit "Cookie Settings" to provide a controlled consent. This engine is used in a variety of Ford vehicles, including the Edge, Escape, and Explorer. The Ford 4.6L Crown Victoria had an interference engine from 1991 to 1998. 4.7L Interference, TDI 1.8L 8 valve Non-Interference 6XXX six-cylinder engines Interference Is Ford 2.0 an interference engine? Interference engines made by Ford include its 1.6-liter single overhead cam engine, 2.0-liter double overhead cam engine, 2.2-liter engine, 3.0-liter single overhead cam engine and 3.3-liter engine. Its twin snorkel design drew cool air through the inner fenders via flexible rubber tubes. Why Does My F150 Idle High When I Start It? But opting out of some of these cookies may affect your browsing experience. They include wiring diagrams and technical service bulletins. This 5.0 high-output engine was rated at 157 horsepower and 240 lb-ft of torque. Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. Not so with a non-interference engine. Another way is to find out your cars engine model and check its engine type using the lists below. These cookies ensure basic functionalities and security features of the website, anonymously. 2.4L DOHC Interference 940 SOHC Non-interference If your engine interferes, it means that the valves and pistons share the same space in the cylinder. A quick search came up with 7 models: Interference Engines * Chrysler 3.5L * Kia 3.5L DOHC * Mitsubishi 3.5L DOHC * Mitsubishi 3.5L SOHC Non-interference Engines * GM & Saturn 3.5L * Isuzu 3.5L . Interference engines made by Ford include its 1.6-liter single overhead cam engine, 2.0-liter double overhead cam engine, 2.2-liter engine, 3.0-liter single overhead cam engine and 3.3-liter engine. An interference engine is a type of internal combustion piston engine in which one or more valves in the fully open position extends into any area through which the piston may travel. 3.0L Inline 6 (1992-97) Non-Interference Additionally, the Ford 4.0 V6 is easy to work on and has reasonably priced parts. The result is usually catastrophic engine failure. At the same time, the valves will need to have a wider opening to improve airflow. For this reason, its important to keep up with the recommended maintenance schedule for your 4.0L Ford engine, which includes replacing the timing belt every 60-90 thousand miles. 1.6L DOHC Non-Interference You also have the option to opt-out of these cookies. A guy by the name George Stirrat (stee-rot) headed up the engineering group which was code-named The Canadian X Project. The timing belt or chain is responsible for keeping the pistons and valves in sync with each other; thus, if this component fails or stretches, it can cause the pistons to strike the valves. B234 (F, G) Intereference The camshafts are what open and close the valves in each cylinder, so it is important that the timing chain stays tight and does not slip off of the sprockets. Thus, this way, they will be able to check if there are damages inside the cylinders. Early Access To Exclusive NEW Products, News, Tech & MORE! Then its crate engine time, and Ill have a good quality, double roller timing chain to put on it! The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". The Ford 4.0 V6 engine is a popular choice for many Ford vehicles. Non-Interference 2.3L 4 Cyl. Welcome to the forum.the Ford 302 in a truck app. Can I just replace my timing chain or is there potential valve damage? Its also a powerful engine that provides good performance, and it gets good gas mileage. Technicians also have service manuals to check if the vehicle model features an interference or a non-interference engine. You can have several timing belt components replaced too. These are typically found without variable valve timing (VTec) or variable cam timing (VTec-e). Unlike the previous years where there were two versions of the 302, there was now only one iteration of 5.0 with the addition of SEFI. S80 Interference However, the Zetec ACTS as a freewheeling engine, given that Ford put recessed pistons in the engine to give the valves clearance to be fully extended and the crank can turn without the cams without damage to the pistons or valves. The 3.2L and 3.0L DOHC (1989 - 1995) engines have a timing belt and are non-interference. This cookie is set by GDPR Cookie Consent plugin. This engine provides plenty of power for most applications, but it also gets good gas mileage. The 4.0 SOHC engine was introduced in the Ford Explorer in 1996, and it quickly became one of the most popular engines in the Ford lineup. 2.4L SOHC Interference Owners of Ford vehicles equipped with interference engines and timing belts rather than timing chains should follow the automakers recommendations for changing timing belts. Jun 15, 2012. Is a 302 Ford an interference engine? All Honda engines are Interference except 3.0L & 3.2 which are Non-Interference. Mar 1, 2004. $542.02. The Ford 302 has been used in quite a few Ford, Lincoln and Mercury models over the year including vans, pickup trucks and of course the popular Mustang. The 5.0L became available in the AWD Ford Explorer in 1997. Interference engines have tighter tolerances between the moving parts, which results in less vibration and wear. My #8 intake valve makes a ticking/tapping noise. If you start hearing clanking noise when the engine is on, the timing chain is due for change. where a "sealed" engine is necessitated PUSHROD CRATE ENGINES // 302. Per the OEM Manuals, the 4.6L is an interference engine. Probably cheaper to stick another engine in than repair. What happens when timing belt breaks on non interference engine? 1.9L Non-Interference Part Number . The Ford 4.0 L V6 is a popular engine choice for many Ford vehicles. There is no definitive answer to this question as it depends on a number of factors, including the make and model of the engine, driving conditions, and personal preferences. This 302 ran fine until this little boggle. It uses forged rods and a forged crankshaft, as well as traditional fuel injection. The cookie is used to store the user consent for the cookies in the category "Other. Performance cookies are used to understand and analyze the key performance indexes of the website which helps in delivering a better user experience for the visitors. im not to keen on that use of the term "may live" haha, Small Block V8 (221, 260, 289, 5.0/302, 5.8/351W), Do Not Sell or Share My Personal Information, 2023 Super Duty Order Tracking / No Off Topic Please, 73 F100 302 with Mustang 5.0 stock headers. 1.6L DOHC (Nova) Non-Interference The following list will provide you the information on whether your car engine is an interference engine or a non-interference engine. This engine was rated at 140 horsepower and 250 lb-ft of torque with an 8.4:1 compression ratio. Free shipping for many products! The cookie is used to store the user consent for the cookies in the category "Performance". The engine block and cylinder heads were cast iron. With Ford, generally anything with a chain is gonna be interference. Answer (1 of 2): That depends on the manufacturer (there are several that make 3.5L engines). V8 engine 2.0L DOHC (626, MX-6 & Protege) Non- Interference A Ford interference engine is an engine where one or more of the valves protrude into an area through which the piston may travel meaning that if something goes wrong with the timing belt or chain, serious engine damage could occur as a result of a collision between valve and piston. This is a high-performance SFI-rated harmonic dampener from Ford Racing. They make sure that the valves are all closed when the piston is near the top dead center. As we said it was lighter, more powerful, and more fuel efficient. If they are interference type engines, Id pay close attention to the belt change intervals! 1.6L Non-Interference The "C8OE-6015-A" indicates a 302 block. How Do You Know If Your Engine is Interference? For 1994 and 1995, Ford rated the high-output 302 at 215 horsepower and 285 lb-ft of torque. 1.8L DOHC (Storm) Interference, All Honda engines are interference except 3.0L & 3.2 which are Non-interference, 1.5L Interference His high quality car buying tutorials offer help to the car buying public. What characteristics allow plants to survive in the desert? I just want to know if the chain snaps if it will destroy the engine or not.. 2.4L DOHC Non-Interference (Valves may hit if camshafts turn out of time) 2.6L Interference For example, the 2019 Ford Taurus 3.5L option has a timing chain while the 1995 Ford Taurus 3.0L DOHC option has a timing belt. Interference Engines - Complete List 2.8L Non-Interference When to change the timing chain on a non interference engine? Just clear tips and lifehacks for every day. 3.0L SOHC 24 Valve Engine Interference In 1968 Ford began to produce what would become one of the longest-running production engines ever. 2 Is my motor interference or non interference? SHE MAIN . Until next time, for all things 1979 to present Mustang and SVT Lightning; keep it right here with the real enthusiasts, LMR.com! By clicking Accept All, you consent to the use of ALL the cookies. Eautorepair.net redraws factory wiring diagrams in color and includes the component, splice and ground locations right in their diagrams. And if you bring your vehicle to a car care shop, the mechanic will use a borescope camera to assess your vehicle. 2003 Ford Focus Timing Belt Or Chain All the North American 2003 Ford Focus models have timing chains or timing belts and are interference or non-interference depending on the engine. The engine has seen some revisions since then, the most recent being in 2018. 1.6L DOHC Interference If a timing belt breaks in an interference engine while the engine is running, the pistons and valves may collide, because they do not have enough clearance between them if the cam stops . Posted 5 months ago in San Antonio, TX. Remember that the timing chains have self-adjusting hydraulic tensioners, so there isnt a lot of slack when the get worn.