Question about Ford Cars & Trucks
The timing chain on the front of the engine slipped 2 links and I am trying to find out if the engine is an interference or non-interference engine.
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Posted on Jan 02, 2017
The rear timing chain (or "cassette" as it's called in Ford lingo) is the chain that drives bank #1 (passenger side) cam. The front timing chain drives bank #2 (driver side) cam. There is a also a primary "jackshaft" chain that is driven by the crankshaft in order to enable both banks to be driven through a common shaft. The reason for this peculiar layout is because this engine is a "derivative" of the 4.0L OHV V6 engine it replaces. Ford simply installed a dummy shaft in place of where the camshaft used to reside on the original OHV engines. But above all else, the job you describe SHOULD NOT be carried out by anyone unfamiliar with this particular engine. There are NO timing marks on any of the drive sprockets, nor are they key to their corresponding shafts. To time this particular engine requires use of FIVE dedicated Ford/Rotunda tools that hold all relevant parts in proper position. Failing to carry this procedure out correctly, will result in the bending of ALL valves with 100% certainty!!! Therefore, it is best left to a Ford dealer technician to carry out. If you would like more information regarding diagrams, TSBs, and procedures with detailed illustrations, please e-mail me directly with your FULL Yahoo e-mail address so I can attach PDF files. Hope this helps.
Posted on May 18, 2008
Yes, that model is an interference motor. Most of the pontiac grang am's and grand prix's are. Sorry, I'm sure that was the answer you didn't want to hear.
Posted on May 25, 2009
Hello mawbea: My name is Roger I will answer your question. You did not say which engine is in your car. So if you have a 2.0 SOHC engine. If the belt broke you should be Ok. If you have the 2.0 DOHC engine. The likely hood of bending the valves are just about a guarantee. How ever with any engine using a timing belt it is possible to bend a valve.Should you need more help please just ask.
Please rate the quality of your answer as this way we know you received helpful information.Thank You for using Fix Ya, Roger
Posted on Jul 08, 2009
all Zetec engines (2.0 DOHC) are NOT interference engines. There are deep reliefs cut into the top of the piston to clear the valves when they are fully extended. There will be no valve damage if the timing belt breaks on a Zetec engine.
Posted on Oct 29, 2009
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