View Single Post
Old 01-11-2020, 07:39 PM   #4
Hal Beatty
Senior Member
Hal Beatty's Avatar
Join Date: Jul 2012
Location: Bellingham, WA
Posts: 113
Default Re: Rebuilt motor start up

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.
Hal Beatty is offline   Reply With Quote