Recently bought a set of Pro Comp 3002 aluminum heads the guy i got them from could not tell me what valve spring was on them ,they either come with a hydraulic roller valve spring or a flat tappet valve sprig how can i tell what is on them ,

buy new springs for the cam you will be running, then you will know.

Generally a flat tablet cam will have a single spring, hydraulic rollers will have a single with damper or dual. Of course there are exceptions to this rule but for 90% of the generic heads this will usually be the case.

A quick spring rate check will also highlight which one you have.

You should be able to have your machinist pull a couple and test them.
If they were assembled from ProComp and not a local, I wouldn't trust 'em regardless of the readings.
Hate to agree with Ed, but why take a chance? Buy quality springs with the pressures and rate recommended by the cam manufacturers. Valvetrain will be worth a lot more than the head castings, but who's counting?

cant find any info on these heads as to what size spring they take, there use to be page that had all this info .

quote:

Originally posted by JCDRAGS:
Recently bought a set of Pro Comp 3002 aluminum heads the guy i got them from could not tell me what valve spring was on them ,they either come with a hydraulic roller valve spring or a flat tappet valve sprig how can i tell what is on them ,

It's a crap shoot.
I wouldn't do anything until the heads are inspected and checked for installed height, and correct retainers / keepers, etc.
Hydraulic roller and solid flat tappet are going to be very similar in spring requirement.
Race only solid flat tappet with stainless valves I like to keep seat pressure 130-135-ish and over the nose pressure under 400, about 350-370-ish, considering my use is 98% under 6600 rpm's.