I have a gm 350 and am running dual fuel, edlebrock carb, performer intake manifold and an impco 425. I run propane most the time but every night i turn it back to gas so it will start easier in the morning, and the carb will be full of gas so the seals don't go bad. I have been having a problem with the gasket between the carb and the intake manifold. it starts leaking every 3 weeks and then it has to be replaced. I figure its from the lp drying it out? The gaskets i've been using are the standard Mr Gasket type. are these not good enough? should I use black permatex? or cork? any ideas?
thanks in advance!
dual fuel carb gasket
I have used Dedicated LPG on 350 with performer manifold for over 20yrs, never had a leak...
1/ Do you torque your carb down? If u dont u risk warping the surfaces
2/Check the surfaces are not warped, if they are resurface them on a sheet of glass, about 100 grit wet dry and kerosene...or get them machined
3/ carb manifolds no not require sealant...applying a very thin film of oil to each surface stops the gaskets sticking when dis assembly
4/ One can use something like locktite gasket sealer....again be very careful how much u use, if it spreads inwards up can have problems
1/ Do you torque your carb down? If u dont u risk warping the surfaces
2/Check the surfaces are not warped, if they are resurface them on a sheet of glass, about 100 grit wet dry and kerosene...or get them machined
3/ carb manifolds no not require sealant...applying a very thin film of oil to each surface stops the gaskets sticking when dis assembly
4/ One can use something like locktite gasket sealer....again be very careful how much u use, if it spreads inwards up can have problems
LPG is inert...it doesnt dry out or attack sealsthe carb will be full of gas so the seals don't go bad.
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