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47Merc · 05-10-2019, 08:14 AM

I have a 1940 81A engine with a flywheel which is possibly not original as it has only ever been fitted with an 11 inch clutch and pressure plate.

The question is, would it have come from a later truck or similar or did they fit 11 inch clutches in 1940 and also would the flywheel be heavier than a 1940 car flywheel that uses a 9 or 10 inch clutch?

I am considering getting it drilled for a 10" pressure plate as the 11" one cannot be removed without taking the sump off but if it is too heavy for use in a car I'll look for another one or possibly get it machined and if thats the case how much metal would I remove?
Thanks

05-10-2019, 08:14 AM	#1
47Merc Senior Member Join Date: May 2010 Location: Australia Posts: 362	11 inch clutch flywheel question I have a 1940 81A engine with a flywheel which is possibly not original as it has only ever been fitted with an 11 inch clutch and pressure plate. The question is, would it have come from a later truck or similar or did they fit 11 inch clutches in 1940 and also would the flywheel be heavier than a 1940 car flywheel that uses a 9 or 10 inch clutch? I am considering getting it drilled for a 10" pressure plate as the 11" one cannot be removed without taking the sump off but if it is too heavy for use in a car I'll look for another one or possibly get it machined and if thats the case how much metal would I remove? Thanks