Quote:
Originally Posted by Russell James
If you want to be proactive.... Use great oil. Something like an Amsoil. And be careful with the break in.
A lot of valve to valve guide wear occurs during break in. Especially if that clearance is a hair on the tight side when green new. The seals are new, the parts are tight... there won't be much oil lube in there, and lots of heat. Recipe for galling if pushed hard when green.
So many people talk about driving brand new engines like they stole them. Trouble is, if there is a valve stem a bit snug it will gall like crazy.. and that starts the premature wear. Break it in easy and let the valve stems and guides get to know each other gives it a much better chance at maintaining proper clearances. Not super easy, just normal driving, moderate varying loads.
Info is from a neighbor who works in powertrain dyno testing for one of the big three. Tells me all the time about what happens when a green engine is thrashed wide open. Most survive... but if one has a tight valve or a tight piston... bad things happen. That same engine with parts a hair too tight, if broken in easy will be just fine.
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Great info! I have always followed the break in procedure on other cars. What is it on a new Camaro? 1000 miles varying rpms and never over 5k?