The rebuild of my engine is done and we're putting the engine back into the car.

It should be ready tonight or tomorrow.

My car is a daily driver and I'll drive it this winter.

I was wondering if the fact that it's -19C make a difference for the break in?

Should I wait for the temperature to be warmer or it doesnt matter?

Might sound like a stupid question but I dont want to take any chance. This build up wasnt exactly cheap.

Maxime,

 

as long as u allow the engine to reach full temperature before beating on it, u shall be good

 

I would honestly wait to break in the motor.......do it on a dyno or something.

But anyway, I wouldn't take my new motor out on the road with it being -3* F. Someone else could hit a patch of ice and t-bone you or something. Its just too risky. Thats why I have my car parked right now.

 

I started my fresh engine a few nights ago.

It's not really that cold here though, it's a little below freezing. Plus, I started it in my garage where it was warm and let it warm up completely before taking it out to break it in.

I don't see any problem breaking an engine in while it's cold as long as you let it warm up completely. On the other hand, I don't think I'd be outside trying to start it up in that cold of weather.

I say, if you have it in a garage, then go for it. If it's sitting out in the freezing cold weather, wait till it warms up a bit.

This is just my opinion though, and I have absolutely no evidence to support my opinion either way.