I keep seeing the term blow-by, but I've never seen a definition of what exactly it is. Would someone please explain it to me? I tried searching for it, but couldn't find a definition.

Thanks!!

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Michael Roth

1982 300TDT Wagon
1982 240D Euro!, 4spd manual-Parts car now, dead engine
88 Jeep Grand Wagoneer-fixing up for offroading
1989 Ford F150 (rust bucket) For Sale!
1953 Dodge B-4F, 1 1/2 ton Stake Bed (new restoration project)