Quote:
Originally Posted by cleszkie
Jaros44sr - The Dorman ramhorns come with studs, washers, lock washers, pinch nuts, and manifold donut gaskets. I used one washer, one lock washer, and a pinch nut on each of the studs with a dab of anti-seize. What is the benefit of using brass nuts? Do they resist corrosion better?
The instructions that came with the manifolds suggested that they be installed without gaskets between the manifold and head for optimum sealing. However, I was not certain that my heads were perfectly flat to mate to the manifolds, so I used the Felpro semi-metal gaskets for a stock application (part #MS 9275 B).
BTW, the Dorman part numbers are 674-504 and 674-503 for the right and left manifolds.
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The brass won't oxidize, so it will allow you to unscrew the nut by hand once you break it loose, anti-sieze is a must, higher temp one preferred. If you have long studs this can be an advantage, hard to get a wrench in there. Racket wrench may work. Gaskets, no gaskets is an ongoing debate, I just use a copper shield spray on...if there is no gasket there it can't blow out, but as you state, surfaces have to be flat
JMO but lock washers are useless, since when they get hot, they lose their tension, locking tabs are better cause they maintain proper torque, and I'm sure that this is why you will blow a gasket in the first place. Hot and cold cycles back out the bolt
Simple check is to put a strait edge on the heads, look for light, use a flashlite