Check that the valve covers aren't warped or dented on the mating surface. Also the sheetmetal around the bolt holes often gets pulled into a peak around the bottom of the hole. When using cork gaskets I prefer to coat them entirely with rtv in a thin even layer and let it mostly dry before installing which helps them to seal, hold up longer and resist splitting from over torquing the fasteners.
75 Plymouth Voyager build in progress: 5.9 Magnum with Demon 4bbl, built 727, al radiator, custom dash, custom kayak/canoe rack, solar/inverter/deep cycle setup, helper airbags, on board air, forklift-proof rear bumper....toolbox hauler/steath camper/long drawn out project.....
|