- About This Product
DescriptionIf the engine oil in your '98.5-'20 Dodge Diesel truck is blowing right past the o-ring onto the valve cover, it's time for a new oil cap O-ring. This OEM part fixes the problem.
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Slowed Oil Leak
Nov 14, 2017 | By Tim Waldo
So not only was I getting oil leaking around the oil cap, but from vacuum pump. The o-ring stopped the leak around the oil cap and slowed down considerably the oil leak from the vacuum pump.