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I just pulled the flywheel off my 1921 Peugeot 161 engine and discovered that it has no rear seal for the crankshaft. Instead, it is a "close fit" with a screw thread cut into the end of the shaft which (I hope) draws the oil back into the engine. Is this a common feature on cars of this vintage?

Phil

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I have seen this on crank and transmission shafts,,on both cars and motorcycle,,Vincent used this on crankshaft to keep engine oil separated from chaincase,, I'd have to think on the cars,,but I have seen it and they seem to work as long as the bearing is not worn out,,OR,,too much backpressure in crankcase,,Hope this helps,,,Ben

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