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I pulled the engine out after a bad oil analysis. I pulled it apart and
found this with only 400 miles on the engine. Every bearing has some sort of mark on it but this was the worse one. Crank is fine luckily. What would cause this with so low of miles. Thinking of taking it back to the builder and telling him to fix it but I want to see people's opinions on what could cause this. Thank you
Thanks for the reply, I changed the oil with 150 miles on it and sent the oil sample in at 400 miles. The oil sample came back high in copper, lead and dirt basically. So I guess I just have to eat it then. I'm just glad the crank is ok and only needs bearings.
Last edited by 02turboss; Sep 8, 2024 at 04:38 PM.
Reason: Spelling
If a builder assembled the engine, he might not have properly cleaned the block, heads, and other parts prior to assembly.
Whoever the builder is better enjoy eating this one.
I'm not happy about it at all. Im going to call the shop today and see what they will do about it. If they don't take care of it I will post there information
I'm not happy about it at all. Im going to call the shop today and see what they will do about it. If they don't take care of it I will post there information
Used Lucas break in oil 20w50. No pass on engine one street hit on only 8 lbs. Bearings clearance was fourth thousands on main and thirty thousand on rods
Used Lucas break in oil 20w50. No pass on engine one street hit on only 8 lbs. Bearings clearance was fourth thousands on main and thirty thousand on rods
Could you clarify those measurements? 0.004" on mains and 0.003" on rods? Kinda looks to me like that crank had some dirt in its oil passages that it passed along to the rod bearings.
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Update on 400 Mile engine 
