Question about 1993 Mercury Capri

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After replacing the alternator belt it is ok for a few months then I find it is breaking in half again, I have replaced a few times, the last with the most expensive one I could and it is breaking agian. What makes this do that

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You probably have an aftermarket alternator, Some come with the wrong pulley installed. You cannot swap pulleys because the shaft is different. This is a very common complaint for this car. Find an original equipment alternator off ebay or a junk yard, you'll see the difference on the pulleys...good luck...blueamber... I have owned 6 of these cars

Posted on Nov 13, 2010

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Probably your best bet is to take the Alternator off and have it bench checked. When the Alternator is spun on a test bench, it is easy to see whether the pulley is wobbling. And without the noise of the engine running, you can sometimes hear bad bearings.

If you have a single Serpetine belt operating the entire engine, then look for a part called an Idler pulley. You can ask to see one in the Autoparts store. This pulley keeps tension on all the pulleys if you have only 1 belt on this engine.

Look at all the pulleys with grooves on them. If they run the same belt they need the same amount of grooves. The exceptions are the smooth pulleys.

Pulley alignment is important too! If this is a recent vehicle with no history someone may have put a washer on the wrong end of a bracket, causing the pulley to run off-kelter. A missing washer may do this too. It is really not very technical, and washers only cost pennies.

Sometimes the crankshaft pulley can work loose. Check the bolts for tightness. Would like to know this outcome so I can pass it along.

Posted on Sep 30, 2010

  • CD Chancey Nov 13, 2010

    Capri after-market alternators are notorius for having the wrong pulley installed, You'll need to find an original equipment alternator and install it...it can be used from a junk yard, just have it rebuilt if needed. You cannot just replace the pulley, the shaft on the new alternators is the wrong size,,,This is a very common complaint for that Mazda engine in the Capri...blueamber

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