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untchable502 03-01-2008 02:42 PM

proper cam break in and rocker adjustment
i'm sure this has been covered on a thread somewhere , but what is the proper break in for a cam, proper oil to use for break in, and when i set my heads in what is the proper adjustment for the rockers (stock) and will i have to do it again after start up???? any help and suggestion are greatly appericiated, also does anyone have a link for a rebuild kit for a q-jet, i have a holley 650 vac secs but i like the q-jets deep sound all this is going on a chevy 350 with a fresh rebuild.... once again thanks in advance

super_silent 03-01-2008 11:39 PM

I use Shell Rotella (diesel motor oil) and a bottle of GM engine oil supplement. As for adjusting your valves, the link below is really good and very detailed:


va4cqd 03-02-2008 12:07 PM

Shell Rotella no longer has the good stuff in it

batstar70 03-02-2008 12:29 PM

I've heard that NAPA house brand oil is just as good as Shell Rotella,for break-ins. Anybody use anything different?

NEW INTERIORS 03-02-2008 12:35 PM

Comp cam said to use the Shell Rotella. :thumbup:

va4cqd 03-02-2008 05:41 PM

from comp cams website:

7. I have heard stories about people having issues with flat tappet break in. What does COMP CamsŪ offer to help reduce the chances of flat tappet failure?

Due to federal legislation, motor oils no longer contain certain anti-scuffing agents that played a critical role in flat tappet camshaft break in. While incorrect valve spring pressure and not following proper break-in procedure are often the culprits, the changes in oil formulation have brought about a need for additional steps to be added to the break-in process.

COMP CamsŪ has two ways to ensure proper break-in of flat tappet cams. COMP CamsŪ Engine Break-In Additive (part #159) ensures that the camshaft will have the lubricants that it needs to seat the camshaft journals and lobe/lifter surfaces. This lubricant is poured into the engine crankcase after the camshaft and lifters have been coated with the initial break-in lubricant supplied with the camshaft.

Another option for increasing flat tappet cam longevity is nitriding. Recently COMP CamsŪ invested in a nitriding machine, the first of its kind owned by a major U.S. aftermarket camshaft manufacturer. Nitriding actually hardens the surface of the camshaft and tappet face by injecting nitrogen “needles” into the metal. The result is an ultra-hard surface on the face of the camshaft lobes and lifter face, which greatly improves the performance and break-in process for flat tappet cams. This process is an additional charge for COMP CamsŪ camshafts, but for many extreme duty applications, it virtually ensures proper break-in and increased durability.

NEW INTERIORS 03-02-2008 05:48 PM

I had a problem with a cam on my big block Chevy,They gave me another one and said to break it in with the Shell Rotella ,And to make sure I broke it in with single springs.that's what I did ,Well second time around no trouble. :thumbup:

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