Rebuild Break In

[GregWeld]

Originally Posted by Sieg

I just had my 355 Gen 1 motor freshened rings, cam, bearings. I was going to do the 20 min 2K rpm break in with open headers.

1) I've had a couple people say no way because if there is something wrong with the motor you won't be able to hear it.

2) With brand new ceramic coat Doug's headers I was thinking they may not discolor as bad with less back-pressure.

Opinions please.

Hooking the exhaust up could cause a week set-back in the schedule.

Complete nonsense.... fire it off and bring it up to to speed... double check the timing and set as required... If there's something not right - you'll hear it in how the motor is performing. And if there's something wrong with it - not hearing it isn't going to fix what's "wrong". It's a do over if you start hearing stuff.

Don't just set it at 2000 rpms though - vary the rpms - your neighbors are going to love you!


Go into any dyno room - you'll see the operators wearing headgear... and they're noisy as hell - you can still hear a lifter ticking if ones gone bad and you can hear the off note.