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  #16 (permalink)  
Old 07-20-2012, 09:00 PM
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Originally Posted by 23 tbucket View Post
after further inspection I found a broken valve spring on the intake vavle cylinder 6, now because I dont know actual cam specs how can I find out what valve springs I need?
As long as you know that it's a hydraulic flat tappet cam (or you know it's a roller, etc.) you can get a good idea by measuring the lift of an intake valve. The cam makers all have to keep the lift vs. duration within a safe range so the lift can be used as a guide.

For example if you have a flat tappet cam w/0.480" lift, you'd have a pretty good idea the cam is not going to be much less than 224 degrees @ 0.050" lift- that would be considered to be a "fast" lobe, like seen on the XE Comp cam series. Comp recommends their valve spring p/n 986 for a wide range of their cams (including a cam like I made up above), including the XE street hydraulic flat tappet cams.

Comp also sells a good (but more expensive) beehive spring for the Vortec heads. It takes a different retainer than stock, though. There are two springs part numbers for different lifts.

If you do a search you can look for info on using OEM GM beehive springs on these heads as well.

Here is a list of valve train points to check.

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Old 07-21-2012, 02:39 PM
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the dry side was on the passenger side, and the spring was busted on the passenger side not sure if they were related, but I replaced the spring with one off a 96 pickup truck with vortech heads the same as mine and it seem so be running good again!! Thanks for all the help
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