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timimg belt
11-10-2010, 03:35 PM
Post: #1
timimg belt
i just replaced a torn timing belt on my 1998 mercury mystique. i was running some earns and my cae just stopped running. i looked under the hood and noticed my brand new belt has been SHREADED!!!!! Y?
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11-10-2010, 10:29 PM (This post was last modified: 11-10-2010 10:32 PM by Rupe.)
Post: #2
RE: timimg belt
You didn't mention the engine size / type but I can tell you there's more than one replacement belt for most of those engines. There's square tooth and rounded tooth depending on the style of teeth on the cogs. There are also replacement tensioner assemblies for the (most likely) worn out one that was in the car originally. (guessing this is a 2.5 ltr)

What I would do is tear it down again and carefully examine each of the pullies for wear, smooth turning (without any noise) and proper alignment. (worn pivot point on a spring loaded pulley?) Most likely you will find your problem there.

The only other problem I have ever seen that is not related to the pullies / cogs is lack of oil in the cam area. If the cam locks up while the engine is running it will do the same thing. Perhaps you can get a gander through the oil fill cap to verify a dry condition and back that up with a few turns of the cam cog? If things look oily and the cam turns reasonably well then that part is likely ok.

Edited to add... I take that back as I have seen other issues... usually mice filling up the belt area with nuts and seeds for winter. IOW, you said "just replaced" but if it's been a few weeks that would be enough time for critters to do their deed!

Let us know what you find as it may help someone else.
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