Quote:
Originally Posted by OwnGTP/WantRTTT
Interesting thread but I can’t believe some of the responses.
If an engine goes 5k miles and then spins a bearing, I can almost guarantee that it has nothing to do with the build itself. If the bearings were screwed when installed, they’d be screwed when you first cranked and it and would’ve knocked right away. In this case, I think it’s obvious that tuning and potentially oil contamination were your culprits.
As far as bearings go, give King bearings a try. I’ve had mine in for two years now, about 8k miles and my oil pressure is 18-25 warm idle, 50+ cruise, 90+ WOT. My crank was turned during the rebuild (not due to a spun bearing, just due to it being on the far end of spec) and polished, these bearings are .025 oversize.
I don’t trust Clevite bearings as far as I can throw them. ACL bearings are top notch, my DSM buddies love them. These Kings are proving to work very well and I highly recommend them, I only wish more people would try them out so we can get more feedback on them.
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I disagree with your argument that bad rebuilds go bad from the start. I think its subjective to what alterations have been done and the previous strain that has been put on the motor. Im not saying that oil isn't a factor, but i think its only one piece of the big puzzle.
I would love to see some research in the oil contamination theory. every once in a while i see some info on it, but i haven't gotten the answers i was looking for. it would be very interesting to see what percentage of peoples builds actually fail and to what causes.
Its just weird to see so may failures to our motors with roughly 5k miles on them that have been rebuilt by different pro shops. Ive rebuilt motors myself and none of them have spun bearings. why do 3s's then? To is sounds like a flaw in design, or the majority of those who work on them. Blaming oil just seems like the easy way out...
Either way negligence destroys everything.
....on a different note...Does anyone here have a REBUILT 3s motor with over 100k?