Quote:
Originally Posted by burgermeister
Yeah, oil analysis might be good - but there was a cooler full of oil with a high concentration of valve guide material in it from the prior set of worn out valve guides, so the results might be skewed. I'll think about it. I did make sure to purge the oil cooler this time around. Used the lawn sprinkler method. Effective, but remarkably messy - I was too lazy to get some hose that fit over the cooler line, so once the air found its way around the remaining oil I got an oil volcano in my wheelhouse ...
Yep, 1000 miles on SAE30 break in oil. It was tough keeping the engine below 4000 RPM that long, but I managed. Seems to run cooler with the SAE30 than with the 20W50 by about 10 degF - odd.
I like the assembly lube + oil idea! Gonna give that a shot tomorrow evening - no time tonight unfortunately. I'll post back with results.
Thanks!
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No offence, but why did you do that? I ask, because that is not the proper wear-in procedure as recommended by top level engine builders (including aviation). I'm not suggesting that has anything to do with what you are seeing in the oil, but just curious as to why you kept the engine below 4K RPM.