Hey everyone, I thought that I would document every aspect of my rod and main bearing replacement to help all of us in the future. First off, my car is a 2000 with 97k miles on it. She is babied until the oil temps are proper (not just until the yellow warning lights go out, but a full 150 degrees at least). Build date 05/00...
After getting the car fully warmed up, I noticed a slight knocking sound when listening under the car right behind the front wheels. It was not noticeable when listening to the top of the motor. After reading many posts on this great forum, decided to take her in and get the bearing swapped. I almost cried today when I saw how many pieces the beast was in. They had a custom build support fabricated so the motor could be suspended, pretty cool (ill have some more pictures tomorrow).
After pulling the rod and main bearings, we found that the rod bearings were subjected to significant lateral loading. As you can see in the pictures below, the top bearing shell has worn through the top polished aluminum layer (the top is subjected to most of the wear). Luckily, the copper isn't exposed, saving the crank from any scoring. Please see the photo below.
When the mains were pulled, the bottom shells looked pretty good with no significant signs of wear. They will be replaced anyways because the whole freakin motor is apart. I'm going to the shop again tomorrow for further pictures and analysis. We're going to boroscope the cylinder walls again to see if we can match up the minor scoring with the severely worn bearings. Hopefully, there will be a correlation there and not a significant ring issue.
- Randall House
After getting the car fully warmed up, I noticed a slight knocking sound when listening under the car right behind the front wheels. It was not noticeable when listening to the top of the motor. After reading many posts on this great forum, decided to take her in and get the bearing swapped. I almost cried today when I saw how many pieces the beast was in. They had a custom build support fabricated so the motor could be suspended, pretty cool (ill have some more pictures tomorrow).
After pulling the rod and main bearings, we found that the rod bearings were subjected to significant lateral loading. As you can see in the pictures below, the top bearing shell has worn through the top polished aluminum layer (the top is subjected to most of the wear). Luckily, the copper isn't exposed, saving the crank from any scoring. Please see the photo below.
When the mains were pulled, the bottom shells looked pretty good with no significant signs of wear. They will be replaced anyways because the whole freakin motor is apart. I'm going to the shop again tomorrow for further pictures and analysis. We're going to boroscope the cylinder walls again to see if we can match up the minor scoring with the severely worn bearings. Hopefully, there will be a correlation there and not a significant ring issue.
- Randall House
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