Bearing damage: What do you think?
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From: Alabama - The 'Ham
Bearing damage: What do you think? A friend and I removed the oil pan from his car (98) because the engine was knocking lightly. Pulled three caps and every one of the bearings showed two "wipes" in the exact middle of the bearing (ie. the bottom of the "U" if you were to hold the cap, bearing side up). They were very small (pea-sized) and each bearing had two of them on either side of where the oil hole would ride. You could see on each wipe where it had worn through the surface layer. Normally, I would think it had sustained an impact. However, we had just removed the heads thinking the knock was in the top end. There were no signs of piston/valve contact at all. The only thing I can think of is an oil system failure of some sort. I wish I had a picture to show you guys.
As a little backround, we were playing on the interstate one night, just a 3rd to 4th run. Afterwards, his car was the same as it was before ... no issues. He drove it all the way to his house and parked it. He got up the next morning to go to work and it knocked on start up. He drove it a little bit thinking it was a lifter but it never subsided. He turned around and limped it back to the house. Oil was not low.
So thoughts?
Thanks
As a little backround, we were playing on the interstate one night, just a 3rd to 4th run. Afterwards, his car was the same as it was before ... no issues. He drove it all the way to his house and parked it. He got up the next morning to go to work and it knocked on start up. He drove it a little bit thinking it was a lifter but it never subsided. He turned around and limped it back to the house. Oil was not low.
So thoughts?
Thanks
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From: Alabama - The 'Ham
We pulled rod caps only. We haven't looked at the mains yet since the engine is still in the car. After seeing 3 like that, I figured it was an oil system failure of some sort which would mean going through the entire engine. We just pulled the caps and looked at the bearing in the cap. We didn't rotate the crank to look at the top side.
Check this out
http://www.tec.nsk.com/Troubleshooti.../Smearing.html
Just click on the left hand column untill you find one that matches. Sounds like brinelling or smearing, maybe scoring.
http://www.tec.nsk.com/Troubleshooti.../Smearing.html
Just click on the left hand column untill you find one that matches. Sounds like brinelling or smearing, maybe scoring.
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Thread Starter
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From: Alabama - The 'Ham
He has drained the oil twice on the car since this happened and I wasn't present either time. However, we've had the complete top end and oil pan off the car. I haven't seen any metal shavings.
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