Rebuilt Heads break-in Tips

[mr.ee's]

I've found threads discussing break-in proceedures for new and rebuilt engines.

take it easy for 1st 500 miles then change oil.
no synthetic oil during break-in.
also, if cruising at steady speed to vary rpm's
etc.

Does this hold true for engine top rebuilds also?
i'm currently having my heads rebuilt.

302 w/ rv cam
4bbl holley
edelbrock manifold
headers
electronic ignition

currently, i'm running synthetic oil.
do i need to change to regular oil?
i've heard not to change back to regular oil.

what about light towing?

thanks for any tips

 

[NoJoe]

Just bolt them on and don't race anyone over 5000 rpm.;D

 

[ctowery]

No breakin required for heads.

Cary

 

[JWMcCrary]

No breakin required for heads.

Cary

What he said....breakin only required for rotating assembly.

 

[76Broncofromhell]

The oil thing is to allow the rings to set and a flat tappet cam to break in.

As said above, top-end requires no break-in.

 

[mr.ee's]

thanks tons