Miss educated post like this. Thank you for the knowledge
Quote:
Originally Posted by CJD Automotive
Dry sumps are sealed systems. Good pumps can pull over 20” of vacuum on the crankcase, literally pulling in gaskets and seals. Most use a vacuum regulator installed on the engine to limit that to 12-15”. If you do have an air leak, you are pulling and mixing the oil with a large quantity of air. That makes foamy aerated oil. The tanks are designed with screens and steps that deareate the oil as it settles from the top to bottom. With an air leak, especially as big as a PCV hole, the amount of air is so excessive the tank simply can’t remove it from the oil. The air expansion in the tank, normally handled by the TANK breather, is being overwhelmed by the excessive air, the oil is not deareating, and gets puked out the breathers. The aerated oil provides little to no bearing film, and consequently bearing scuffs or failures result. The tiny size of the tank and capacity only exaggerated the issue.
They were running this engine at 10/10ths for two lap stints, with less oil capacity than required and massively aerated. Can’t understand how they did this multiple times for multiple days knowing they were causing damage. I simply don’t understand that thought process.
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