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Cake day: July 1st, 2023

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  • Not all cars have oil separators, but a blocked PCV valve can cause the same symptoms of oil being sucked up from the crankcase into the air box/intake/throttle body, and thus rapid oil consumption. This happens especially on cars that are neglected in terms of oil change intervals and hence sludge up.

    The PVC valve is one of the items that need periodic replacing or at least cleaning (and if cleaning subsequent thorough drying before reinstalling). Also, check the associated lines aren’t clogged too, a weed wacker line is a good tool to poke through the lines to check. The PCV valve is almost never mentioned in service booklets as routine service item, it borders malice by the manufacturers and grinds my gears.

    The amount of people I talk to about a PCV valve being the cause of their oil consumption and who never heard about, or know what it is, is too damn high.

    Before you pay a mechanic thousands for open engine surgery replacing stem seals or oil control rings, check your PCV valve, gents.