Fuel petcock hard to turn

R

ROBERT JAM

Member
My petcock has gotten hard to turn. It was new a couple years ago. Any suggestions on freeing it up?
 
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Back off a little bit on the packing nut and see if that helps. loosening the packing nut a small amount has worked for me .
 
Pour about 1/2 litre of engine oil into the tank.it will settle on the valve and lube it up.
Lawrie
 
30 Closed Cab PU said:
I've read that use of Marvel Mystery Oil added to gas helps prevent this. An opinion of others, do not know if true.
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MMO helps, and I also use it. Also turn the valve ON and Off at least once a week, even if you don't drive the car. This modern gas evaporates quickly and leaves deposits behind that help stick the valve. I restored my valve over 20 years ago, and it turned very easily until I let the car set parked in my garage for a year.
 
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