[lt1tyrell]

I bought a new zz4 and it literally came with nothing in the crate. A couple small pieces of paper and a return card for a core. Nothing with specs, valve adjustment, recommended oil, break in procedure or anything! Did anybody else get more information than me?

[DoubleVision]

Roller cam engines don`t require a cam break in. I would run it on conventional oil for the first 500 miles, change it, and run it the normal 3000 miles. Afterwards you can switch to synthetic oil if you wish.

[ericnova72]

DV is correct.

A good tip for ring break-in is once you are out on the road is to lock the trans in low gear, then proceed to do a 10-cycle acceleration/coast down. Accelerate stoutly(3/4 throttle+) from a very slow roll up to 4500-5000 rpm, then off the gas and let the engine do the braking back down the rpm scale. 10 repetitions, this loads the rings against the cylinder walls to properly seat them.

[302 Z28]

This is a copy of the page in the booklet that came with my Fastburn engine.
I had to post the larger image so you could read it. I also know that the current logic about break in of roller cammed engines does not follow this procedure to the letter, but it's better to be safe than sorry as far as Pace Performance is concerned.

Vince

[lt1tyrell]

Thank you very much this is just what I was looking for.

[302 Z28]

Your welcome, good luck with your engine.

Vince

[Deuce]

Originally Posted by lt1tyrell

I bought a new zz4 and it literally came with nothing in the crate. A couple small pieces of paper and a return card for a core.

I have bought 5 Chevrolet crate engines in the past few years ... ( a couple for myself and a few I installed fin customer cars ) and I have N E V E R had a request for a core ... when buying a ZZ4

[302 Z28]

Me neither Randy, I completely missed that one.

Vince