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Ford 9N, 2N and 8N Discussion Board |
Re: Blown Head Gasket or Cracked Block
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Posted by IHank on March 16, 2000 at 15:22:04 from (167.142.25.214):
In Reply to: Blown Head Gasket or Cracked Block posted by Kent on March 14, 2000 at 07:39:13:
Kent- You got a string of good replies to work with here. I suggest you do a cylinder leak test. Sun Electric made 'em and other brands are in the tester equip. market. Pull the plugs, run the piston to TDC compression stroke, block the crank from being able to turn, apply regulated air pressure to the cylinder. Hope for a leak meter reading under 10%! Over that on all cylinders indicates need for overhaul anyway. Then, listen to the carb inlet, the tailpipe, the oil filler, the cylinders on either side, and then look in the radiator. That'll tell you where the leakage is going- valves leaking, rings/piston/cylinder worn, blown head gasket, or possible cracked block or head. Do the procedure for each cylinder. If you got air blowing out of an adjacent cylinder most likely you got a head gasket blown thru between the cylinders. The part about the rapidly yucky oil is a bad sign. Bubbles and hiss/gurgle sound in the raditator can be from either gasket or cracked casting problem. Keep in mind that that Ford engine has a lousy crankcase ventilation design. If you got high blowby because of worn rings and just do short runs and not heat the engine up, it will rapidly accumulate condensation in the oil. Does it have a thermostat and if so is it giving a constant 160 - 180 degree cooling system operation? Plan B- A quick & cheap check is to top up the radiator to the overflow tube, loosen the fan belt and tie the fan so the water pump don't turn, start the engine and let it idle a few moments, then jerk the throttle to wide open. Watch the radiator opening from some distance to the side... If the radiator pukes that confirms a gasket or cracked casting problem. I hope you don't need it, but wish good luck anyway, IHank
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