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Old 01-11-2020, 10:55 PM   #8
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Join Date: Jan 2012
Location: New Jersey
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Default Re: Rebuilt motor start up

Originally Posted by Hal Beatty View Post
New cam and lifters? If so, you'll need to run it at 2,000-2,500 rpm for 20 minutes to break them in... even though flatheads don't run the valve spring pressures that overheads do I'd want to do a good break-in on these parts.
Yessir, new cam and lifters. New everything!
Can this break in be done after the motor is pre-tested and back in the car?
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