DaveL485
Staff member
Everyone has their own version of startup routines.
Personally I build the engine up and fill it with the oil ill use when running normally, 5w50 synthetic for a 21, same or 10w60 for a C1J. Crank until the oil lights go out, then fire up and let it run for a few secs before shutting off to listen for knocks or taps or nasty noises.
Once the cooling system is built up then it gets a full heat cycle, to fan temp with fast idle to start gradually increasing up to maybe 4000rpm. Full cooldown and retorque head bolts, set valve clearances, fullly assemble and ready for road test.
Then its just driving it, and gradually increasing load and revs, probably over the next 50 miles or so.
Bear in mind the heat cycle and 50 miles will see your engine do about half a million revolutions if its not bedded in after that then something is wrong. Oil and filter change around 500 to 1000 miles, then every 6k after that.
I dont subscribe to the "run in with mineral oil" stuff - synthetic only for me. Why would you put shit oil in a brand new engine build?
Personally I build the engine up and fill it with the oil ill use when running normally, 5w50 synthetic for a 21, same or 10w60 for a C1J. Crank until the oil lights go out, then fire up and let it run for a few secs before shutting off to listen for knocks or taps or nasty noises.
Once the cooling system is built up then it gets a full heat cycle, to fan temp with fast idle to start gradually increasing up to maybe 4000rpm. Full cooldown and retorque head bolts, set valve clearances, fullly assemble and ready for road test.
Then its just driving it, and gradually increasing load and revs, probably over the next 50 miles or so.
Bear in mind the heat cycle and 50 miles will see your engine do about half a million revolutions if its not bedded in after that then something is wrong. Oil and filter change around 500 to 1000 miles, then every 6k after that.
I dont subscribe to the "run in with mineral oil" stuff - synthetic only for me. Why would you put shit oil in a brand new engine build?