Asked in Auto Parts and RepairsGM and GMC
How do you fix leaky header gaskets on a 1991 350 gmc pick-up nothing seems to help?
February 20, 2014 11:04PM
best way to fix that is to use 2 gaskets
apparently one is not sealing ,probably because headers are slightly bent
you could also have headers machined
try using the factory style gaskets. Fel Pro is better. and turn them backwards so the metal side is on the head.
The copper or aluminum reusable gaskets also work well.