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Old 02-01-2005, 09:32 AM
darom darom is offline
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bad or good: engine break-in

Hi guys! Just wanted to ask your opinion before I start tearing things apart. I put together a 383 and did a break-in. The cam was lubed with Comp's red liquid, the lifters' bottom surface with STP. The whole thing was primed with a drill and modified distributor shaft to run the oil pump.

The engine ran at over 2k rpms for 15 minutes due to overheating later (small radiator on the engine test stand). I shut it off when the temp was at 240-250F. The oil pressure was over 80 psi, unfortunately. My 2-piece rear main seal started to slowly leak.

Here is the sad part: when I drained oil, it was dark amber color with graphite looking powder. The same was at the bottom of the oil pan when it was removed. I did not have a magnet, but the substance was very fine, black color. A few questions:
1. Did my cam's lobes are gone? (there was no lifter noise when the engine ran, however)
2. Did the crappy Comp's break-in lube get disintegrated into this graphite crap residue?
3. Is it somehow related to the new Vortec heads assembly lube they used at the factory? (when I installed the heads, they were clean)

I cleaned the block myself and made sure all oil passages were clean. The block was hot tanked, pressure washed, hand soaped etc. Where did I mess up? That's my first build, so please bear with me.

'67 Camaro RS
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