Originally Posted by frankOne
I am getting ready to breakin a pontiac 400 engine in a 71 firebird with an auto trans. I was told that to minimize the load on the engine I should not connect the torque converter to the flexplate for the first start up and 20+ minute breakin process. Is this reasonable and is it a safety issue with the flexplate turning 2500 rpm so close to the stationary torque converter. Thanks for any comments.
Connecting the TC will not be an issue. Bolt it up and proceed w/the break in.
• Info on cam break in
• First start up
Cam break in requires no load on engine. That's later on when you're breaking in the rings, etc. the rest of the way.
DO NOT break in the cam w/the wheels turning while up on stands.
Put the trans in Park, choke the wheels. A large fan in front of the radiator can help, be sure the timing isn't too retarded.