best valve stem seals for PRC dual valve springs?
03-16-2012, 01:52 PM
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best valve stem seals for PRC dual valve springs? I just recently installed a heads/cam/FAST90 set up on my 05 GTO. Today it started a bit of greyish/blue oil smoke under WOT. Im pretty sure its a valve stem seal (or multiple) that has come unseated. What is the proper part number to use with the PRC .650 duals? Is there a fel-pro or GM that will work that I can pick up at the auto parts/dealer this weekend? These are 243 heads. I had new seals installed when I rebuilt the heads but I don't think they used the correct seals. Thanks for the help guys.
06-05-2012, 04:12 PM
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I noticed that, I've had to do my seals 3 times with these springs. I used GM deals previously. I just swapped rockers and springs over the weekend, and an alarming amount of my seals had come unseated. I just put the PRC .675 springs on with the blue fel pro seals, hoping these will work better.
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06-07-2012, 12:22 AM
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I have PRC 5.3 heads on my 382, and TSP assembled them originally. After 5-6K miles it was using a TON of oil and smoking, and the spark plugs were covered. I pulled the springs and half the seals were off. I changed the seals and the problem went away for two or three years. I just did this the other day, and half the seals were out of place. So the ones TSP put on failed or came off, as did the ones I put on. I think its a problem with the design.
