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Author Topic:   cam breakin
robskins75
Member
posted March 03, 2004 04:04 PM
how do you guys break in a new cam?Was told to put 12 to 14 quarts in motor and run it at 2000 rpm for 15 min. drain to 7 quarts and run for 20 min.Said crank will throw oil up to cam.


BrianW
Member
posted March 03, 2004 04:42 PM
Roller or flat tappet?

For a flat tappet - Assemble with a generous amount of ssembly lube on the cam lobes and journals, coat the lifter face and sides. Add the "regular" amount of dino oil (i.e. 7 qts in a 7 qt pan), pre-lube the system, then stab distributor and fire up, pull RPM's up to 1800 and if it's holding good oil pressure and sounds OK run for 15 minutes with no-load while varying RPM's between 1800-2200. Shut down and let cool, then run it with a load to break in the rings, then change the oil while still warm...

That's the way I've always done my street and race engines and haven't had one come apart yet (knock on wood) - the only one that failed was an expensive machine shop built one that I bought with the car and found out that it was cobbled together...

Okie11m
Member
posted March 07, 2004 11:19 AM
If you put 14 qts in it the city will hire you for their mosquito fogger!!!!! Just use plenty of lube hold it at about 1700 for 10-15 mins.


Sidebite252
Member
posted March 07, 2004 12:05 PM
12 to 14 quarts of oil. WOW! We do as Brian suggest but we are the idiots that go as far as to remove the inner springs for the initial break in and then re-install the inner springs. David Visar and others recommend the 2000+rpm to keep oil on the cam since it receives it's lubrication from what's slung off of the crank shaft. I do recommend the generous coat of cam lube and a moly coat lube is really good - sticks to the cam a little better than the red or blue lubes but we use them too. If you do decide to use the 14 quart method please let us know how that works out. Good luck!


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