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A collection of helpful articles based on reader submissions
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Below is a collection of Jim Grant's Tech Tips sorted by Vehicle Make. These Tech Tips were answers to questions submitted to Jim by ALLDATAdiy.com users over the course of many years.
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  Jim Grant's Tech Tips

'94 Mazda B4000, Alternator Belt Tensioner

Q: I just had to replace the alternator on my ‘94 Mazda B4000 6 cyl. Pickup. The spring loaded automatic belt tensioner now appears to run at a bad angle. It looks like it is out of alignment. Is this normal? I forgot to look at it before I loosened it and removed the belt. Any help is very much appreciated.

- Ron H.

A: It is not uncommon for an automatic tensioner to have the type of problem you’re describing. The tensioner’s internal bushings wear with age resulting in an alignment problem. The problem is common enough that you should find it in stock at your nearby parts store. The only concern I have is you said that you unbolted it. To service the serpentine belt on an engine equipped with an automatic belt tensioner only requires rotating the tensioner back against the spring tension. If you removed the tensioner you may have mispositioned it. Most automatic belt tensioners have an alignment dowel to reference the tensioner correctly. If the dowel is not in the correct position, you will have an alignment issue.

 
     
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