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B20b cam change 140-160 1969

posted by  Volvo From Heck on  Mon Aug 26 12:56 CST 2013
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last visit: Mon Oct 13 20:56 CST 2014
[RELATED]

I've seen some "steel" gearsets that actually used an aluminum gear for the cam--I'd imagine those will quiet down - but all steel will probably remain noisy as Dakar09 suggested.
I'm pretty sure that the spec for the 1975 B20F - which supposedly had the K cam (although I've taken plenty of them apart and have only found D cams) - was .022" clearance. I've had a K cam in my '69 B20B and have run .016" for the 200k total miles the cam has been in (first in a B18D). I used aftermarket lifters (which I've learned through the BB were Chevy SB lifters) and tubular pushrods. When I switched the cam/lifters/pushrods out to the B20 they looked perfect and I've never found any real wear when rechecking clearance. -- Dave






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