I recently got my oil pan gasket replaced since it was leaking a lot. Ever since the repair was done, I am hearing squeal from the idler pulley/serpentine belt area. I had replaced the serpentine belt, idler and tensioner assembly a year ago. The repair shop says that the oil pan gasket has nothing to do with the squeal I am hearing now. Has anyone seen this and curious if there is a connection..since it is odd that I am hearing this back after the oil pan gasket repair job.
Use a water spray bottle method to test and possibly isolate the belt. That’s what I would do first. If it stops squeeling then replace the belt. If not then take it back to the shop and ask them to recheck their work before making accusations.
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