Causes.... likely some combo of all the above. Was never majorly overheated but had gotten hot. EGR on anything from the 80s was questionable. The outer ring in the balancers had a habit of slipping thus causing incorrect timing when it was adjusted. Throttle shaft wear in the carb causing...
Appreciate it. I don't want to chase a ghost either. But if given the chance I would like to fix it preemptive rather than after a catastrophic event. Tough scenario . Sometimes better not knowing I guess.
It's been great. Had to rebuild it due to cracked rings originally, fairly common problem. The cam certainly shifted the power curve north but it still makes great torque and is plenty fun to drive.
Lugging it around definitely hasn't been an issue since it was rebuilt. Up until 3 years ago was a 3speed C6 w/ 4.10s. It does have 33" tires but even then, a quick jaunt on the interstate felt like a Nascar race. It was all balanced at time of build and never seemed to mind the RPM at all.
Much...
I don't know if it could be done in frame. The oil pan gasket wasn't the easiest. Had to jack the engine up a good bit. My concern with that crank even with help it's a massive chunk of iron and navigating the crossmember would be quite the task. Having to pull the trans anyways at that point I...
No, I didn’t pull cap and check afterwards. Issue was caught quickly due to other issues with transmission swap. And as of late I have started running conventional VR1 10w30.
The oil pressure has been like that really since day one. Put a mechanical gauge on it at the time of rebuild and those pressures have not changed over time. I have run thinner oil in it 5w30 or 5 &10 blended. My thoughts were the thinner oil flowing a bit faster especially on all the cold...
Truthfully didn't think about cam bearings. Always go right to mains & rods. It is an aftermarket Comp 268H. While I do recall not being super impressed with the surface finish it wasn't horrible and the builder was good with it. I did inspect lobes while pan was off and they were mint - nothing...
Definitely seems to be a trend too with fuel additives and the like but I tacky didn't see any conclusive info out there. The sitting and some flash corrosion make sense as well.
Thanks for the feedback. I had thought about "flushing" as you stated with a few oil changes just to see if anything changed. That may be my 1st course of action.
Any UOA (used oil analysis) experts want to review and share their thoughts???
Engine fully rebuilt in 2008. I think about 15-16K miles in those 16 years since. Definitely not a daily driver.
No issues whatsoever. Runs great, good oil pressure - stock style oil pump, 50+ psi above idle, hot...