First Generation Firebird-L Mailing List ......................................................................... I learned a long time ago that standard valve covers and aftermarket valve covers need respect. Heres how it works if you have leaking steel valve covers. Every bolt hole on the valve cover needs to be inspected to see if they are dimpled downward from previous over tightening of the bolts. You need to knock those dimpled areas back to the original flat surface. Keeping in mind that you are rebuilding a level playing field. You then place your gasket (cork or rubber) on your cylinder head. I place a slight amount of motor oil with my finger, on the head surface area, and the same on the valve cover. Where the gaskets will meet. I then set the gaskets on the heads using 4" long dowels in each gasket bolt hole as guides. This keeps the gasket in place when you go to set the valve covers on. One by one pull out your setting dowels and put in you bolt after each dowel removal. NOW TIGHTEN YOUR BOLT TO 3 LBS PSI, DO NOT EXCEED THIS TIGHTENING PROCEDURE, IF YOU DO YOU WILL REDIMPLE YOUR VALVE COVER BOLT HOLES AND THEY WILL LEAK. Silicone is the same procedure except I do not put the oil on the head contact area. I use it as my set up base for my silicone to dry a little (10 minutes on a good bead is sufficient ). Remember, removing the dimples first, the dowels, and 3# psi are your best friends for resealing your oil leak from the valve covers. Bob P
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