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parrish
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-- 11-12-2009 @ 7:52 PM
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I'm getting the engine to run after 49 years of storage and radiator and hoses are off from earlier testing. She now starts up, but I noticed what appears to be exhaust coming out of the head water inlet. Does this indicate a leaking head gasket? No sense putting the radiator back on if it does...
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supereal
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-- 11-13-2009 @ 8:12 AM
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It is either exhaust, in which case either the head gasket is leaking, or a block crack between the combustion chamber and the water jacket has developed. Or, hopefully, it is just water vapor generated from engine heat. As you have the hoses off, I'd fill the water jacket to the top of the head outlets and run the engine to see if bubbles appear. If so, pulling the head on that side will be necessary.
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parrish
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-- 11-13-2009 @ 9:01 AM
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hmmm...do I block the water pumps and remove the fan belt to check for bubbles? Also, how difficult is it to remove the heads? Would I heat each bolt? Would I loosen each bolt just a tad and use the compression stroke to pop the head?
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supereal
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-- 11-13-2009 @ 11:36 AM
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You don't have to block the water pumps, just remove the belt. If you have to remove the head, take off all the fasteners and insert a thin bladed putty knife at several points around the head and pry a bit. If it requires a bit of persuasion, using a rubber or soft faced mallet, tap the sides of the head and the putty knife while you pry. Most iron heads will pop loose. Aluminum heads are another story.
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parrish
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-- 11-13-2009 @ 7:38 PM
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thanks. I was looking for a reason to remove the heads anyway...I dumped MMO in and would turn the motor manually a half dozen times each day for a couple days and then did the same with oil. After that I tested compression and was low on 4 (60) and really low on the other 4 (25) so I figured probably valves. I cranked it with no coil to listen for trouble and didn't hear anything really nasty so I added the spark and boom...big dark clouds of exhaust! Excellent! I added a new fuel pump and hoped to run off external tank for some tuning when I noticed the cloudy stuff coming out of the head...Now, of course, the devil is in the details! As always, thanks for your advice.
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