Head gaskets usually don't leak fuel.
Gasser or Diesel.
Quick head gasket test is.
Cold engine.
Remove the cap off the expansion tank.
Tie a latex glove over the opening of the Expansion tank tightly.
Start the engine, and from under the hood rev the engine to 3000 rpm for about 45 seconds, if the glove inflates and give you the finger, Bad Head gasket.
after 50-60 seconds the glove will inflate because of the warming a/f.
Another sign is Ballooning hoses after a warmed engine as they will swell and be hard to compress.
I can think of bad freeze plugs especially on a diesel with a block heater, the heaters do go bad and start to leak.
Valve cover gaskets can leak, especially if you are missing the windage tray over the cam, it was a 82.5-83 add on, that the 81's were missing.
Gasser or Diesel.
Quick head gasket test is.
Cold engine.
Remove the cap off the expansion tank.
Tie a latex glove over the opening of the Expansion tank tightly.
Start the engine, and from under the hood rev the engine to 3000 rpm for about 45 seconds, if the glove inflates and give you the finger, Bad Head gasket.
after 50-60 seconds the glove will inflate because of the warming a/f.
Another sign is Ballooning hoses after a warmed engine as they will swell and be hard to compress.
I can think of bad freeze plugs especially on a diesel with a block heater, the heaters do go bad and start to leak.
Valve cover gaskets can leak, especially if you are missing the windage tray over the cam, it was a 82.5-83 add on, that the 81's were missing.
