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2000 GM: interference engine?

4 messages,  Last post on Sep 08, 2010 at 6:13 AM

You are in the Ford Crown Victoria/Mercury Grand Marquis Forum.

What is this discussion about? Mercury Grand Marquis, Sedan

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#1 of 4 2000 GM: interference engine? by dgilbertson

Jan 24, 2007 (10:05 pm)

Can someone tell me if my 2000 Grand Marquis has an "interference engine"? Also, when should the timing belt be replaced? I cannot find that information in the booklets that came with the car.

#2 of 4 Interference Engines by tharper

Jan 25, 2007 (5:40 am)

When you are researching for your next car is there a way to find out if the manufacture's engines are "interference" or "non-interference engines". I would hate to call all the dealerships and ask.

#3 of 4 Re: 2000 GM: interference engine? [dgilbertson] by ronslakie1

Jan 25, 2007 (6:52 am)

Replying to: dgilbertson (Jan 24, 2007 10:05 pm)
Your GM does not have a timing belt like many of the imports, it has a timing chain and it does not have a regular replacement cycle. It could conceivably go several hundred thousand miles without replacement. Chances are that if it does go it will become noisy (sound a little like a diesel) which will give you a clue that a replacement is necessary.

#4 of 4 Re: 2000 GM: interference engine? [ronslakie1] by snorkelbobby

Sep 08, 2010 (6:13 am)

Replying to: ronslakie1 (Jan 25, 2007 6:52 am)
generally timing chain engines (like yours) are interference engines where the valves qwill hit the pistons if the timing chain fails (remote chance).
 
Generally timing belt engines are freewheeling , meaning the valves will never contact the psitons if the belt fails. However, many import cars do have interference engines with timing belts and they must be repalced at 100,000 miles to be safe.

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