Valve Springs

huskerMember

I'm having some 2V heads built and the mechanic recommended that on initial installation, I leave the inner valve springs off and reassemble the engine. After running it for about 30 minutes @ 3000 rpm, then put the inner springs in. He says this will ease the wear on the new valve train (using the old cam, new everything else: lifters, push rods, roller rockers, valves). Anyone heard of this recommendation before?

8/29/036:15 PM

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Original Post

bosswrenchMember

Sure. Its commonly done in building drag race or pro circle-track engines, These motors use locomotive-strength valve springs and such units on new cams and lifters will overload the lubrication system during engine break-in, possibly damaging both parts. But on a street-type engine with a mild cam & the recommended valve springs, its kind of overkill but does no harm except to your wallet (shops generally charge $60-70/hr). Incidently, the 3000 rpms is critical too, because lower revs don't sling enough oil up onto the cam to lube the lobes- its only source of oil.

9/21/0310:39 PM

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