Can only a dealer do a leakdown test with special equipment? Also, if you put (I'm guessing compressed air) into the cylinders, couldn't that theoretically make a little problem worse by exerting all that pressure on let's say the rings or whatnot? I have no idea...that's why I'm asking!

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'86 420SE Euro
904 Midnight Blue, Gray Velour
Dad bought it new, now I own it.

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