Alternator Rear Bearing Failing
#1
Alternator Rear Bearing Failing
For those of you who are experiencing the Drive Belt/Alt squeal even after the replacement of a new belt. the Rear Bearing of the Altenator is what's failing - this is premature for mine is at 75K miles. but I went ahead and replaced the Drive Belt to see what that would do and it still squealed like a banshee, so here is some pics that I took of the work I did.
the front (sealed) bearing was in great shape as also was the alt bushings and main shaft. the rear (failed seal) bearing proved somewhat worn but impossible to remove - but instead of replacing the unit for now i wanted to see if I could make it last a while longer. I used a can of white lithium grease with a straw nozzle and sprayed at the rear base of the bearing while free spinning. after 2 applications of the lithium grease spray it proved to spin more firm and with more revolutions. so I cleaned the leftover grease with MAF cleaner and cleaned the rest of the unit with a high pressure air nozzle. put it all back together close to the original torque specs. I free spinned the main shaft and continued to tighten 1/4 turn on the 4 main casing bolts until I was satisfied with the results.
I put everything back together and cranked it up (after I prayed over my car) and the issue of the squealing is gone albeit the rear bearing will still continue to breakdown but hopefully this will slow the proccess down. I have driven the car everyday since and so far all is well. but as soon as it gives me issues I will be sure and post when and the mileage.
the front (sealed) bearing was in great shape as also was the alt bushings and main shaft. the rear (failed seal) bearing proved somewhat worn but impossible to remove - but instead of replacing the unit for now i wanted to see if I could make it last a while longer. I used a can of white lithium grease with a straw nozzle and sprayed at the rear base of the bearing while free spinning. after 2 applications of the lithium grease spray it proved to spin more firm and with more revolutions. so I cleaned the leftover grease with MAF cleaner and cleaned the rest of the unit with a high pressure air nozzle. put it all back together close to the original torque specs. I free spinned the main shaft and continued to tighten 1/4 turn on the 4 main casing bolts until I was satisfied with the results.
I put everything back together and cranked it up (after I prayed over my car) and the issue of the squealing is gone albeit the rear bearing will still continue to breakdown but hopefully this will slow the proccess down. I have driven the car everyday since and so far all is well. but as soon as it gives me issues I will be sure and post when and the mileage.
#3
appreciate that. I could have replaced it out of pocket but I try to find the cause of these kind of issues in case it becomes more of a common issue. if it gives me another 15k-20k miles Im a happy camper.
#4
I would have had parts left over. It would have never run again. I would have hurled tools out of the garage. It's cheaper for me to drive the car to the dealer rather than having it towed there with a box of broken parts in the trunk. It's not as humorous for the dealer, though.
#5
I would have had parts left over. It would have never run again. I would have hurled tools out of the garage. It's cheaper for me to drive the car to the dealer rather than having it towed there with a box of broken parts in the trunk. It's not as humorous for the dealer, though.
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JJLanders
ES - 1st to 4th Gen (1990-2006)
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03-02-22 02:40 PM