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Originally Posted by TAZTECH
if it does it when it is idling, then use a stethoscope(similar to a doctor's) and chase down the noise.
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The mechanic at our dealership who changed the front crank seal today said he placed a screwdriver between his ear and the idler pulley, as well as the alternator and AC and he said the loudest noise was coming from the idler pulley.
I am upset because I went to a lot of effort to carefully press out the old bearing in this pulley last week and now I am being told (and I believe him) that the new bearing sounds just like the old one.
Could it be that many 6301 type bearing can be compatible, but manufactured in a way that some are noisier than others. Clearly, the original 8 year old bearing was quiet up until last month, following a 20 hour non-stop trip. For the noise to suddenly appear after all this time means to me that the original bearing may have degraded during the trip, so changing it was a wise move on my part.
But for the new bearing to make that same noise may not be a sign that it is also defective or worn. It may just be the way the SKF version of this bearing sounds.
I am waiting for SKF's answer and I will post any news.