umm.. 'broken in' motor, engine.. what is that? How does one define properly 'broken in' ?

 

My understanding is that the biggest aspects of an engine being broken in are - the piston rings are properly sealed against the cylinder walls, and bearings (mostly on the crank?) are properly seated.

 

I share Elistan's opinion and would only add that this seems to be indicated in the S2000 with a significant drop in oil consumption (which should be checked very often during the break-in period).

 

thanks for clearing that up

 

Why the ? That to me suggests your comment was sarcasm, which means you think we missed the boat in trying to answer your question...?

 

You asked a simple question, you got some simple answers. You want specific, get specific. Trying to help here.

 

erm..the smiley has no meaning whatsoever, i just like the looks of it. sorry if its offensive..

 

http://www.mototuneusa.com/break_in_secrets.htm

that is all i have to say. dave

 

I have still yet to see any proof that his theories are factual. Sounds like a bunch of marketing to me.

 

Seating the piston rings "is" a major part of an engines break-in period. There's also a general wearing in of all moving parts such as the valves in their guides, the rocker arms on the cam shaft, etc.

As for the main and rod bearings, they really don't "wear in" per say. These are plain bearing that are fed oil under pressure. If everythings working correctly, there is no actual physical contact between the crankshaft and the bearing itself. The crankshaft and connecting rods will be floating on a thin film of oil maintained between these parts and the bearing surface by oil pressure.

FWIW!

Drive Safe,
Steve R.