Thread: About to fire up a BBC for break-in, any tips?

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Originally Posted by 69elko

I know about putting it to top dead center and all that. But I recall Denny talking about a method of timing it before you start the engine? Thanks Eric I didn't know you were supposed to prime the engine for that long. Any other good tips?

Yes,if it is a hyd. cam or a solid lift cam dump a can of Comp cam camshaft break in lube a can of GM'S E.O.S. if you can find it.
I would also "prime" the carb to begin with, then say about 20 hail Mary's!!.
I was just kidding about the hail Mary's.

Remove the thermostat fill the block up all the way with coolant with the lower radiator hose installed . Then reinstall the thermostat housing and upper hose . Top off the radiator and run a 10lb cap . This will help to keep your engine from over heating . By filling the block there will be no air pockets . Now you can run your engine 1600rpm for 15 min to break in your cam . When you first start it check good for any leaks . If you had a carb that you know worked good run it for now . This way you sould not have any problems keeping the engine running .

Originally Posted by tango

Remove the thermostat fill the block up all the way with coolant with the lower radiator hose installed . Then reinstall the thermostat housing and upper hose . Top off the radiator and run a 10lb cap . This will help to keep your engine from over heating . By filling the block there will be no air pockets . Now you can run your engine 1600rpm for 15 min to break in your cam . When you first start it check good for any leaks . If you had a carb that you know worked good run it for now . This way you sould not have any problems keeping the engine running .

I.M.O,1600 rpm's is not enough.
I would run at 2,000 rpm,'s or more for cam break-in.