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As a heavy equipment diesel mechanic for over 35 years I can tell you there is a big difference between a Jeep 4 cyl. gas engine and a diesel Hercules with a 22:1 compression engine. How this problem is described, using any stop leak is like "pissing in the wind". It will only get you wet...

My father had an old IHC tractor that had a couple of cracks in the head. It ran great ! Especially after it got good and hot. The downside was it would use coolant like crazy. You always had to have 2 or more gallons with you at all times . After running it for years like that, my father took...

You need to run the engine until it is hot, then put the coolant pressure tester on. The heat will expand the metal and any cracks in it. It could be the heads leaking if your lucky. They don't always cause a "Hydro-Lock" condition when leaking. If it is the block, well then it's time to get...

If the engine is not building up enough heat a hotter thermostat will not help. The standard thermostat for our engines is 180 degree's . I have never even heard of a different one. The thermostat can be stuck open. If that's the case then a new thermostat is in order. If that is not the issue...

Any engine will get that creamy oily crap if you only run it short distances, especially in winter. The engine acts like a giant condenser attracting moisture, and if not properly warmed up will build up this crap. Drain the oil and run it hard ! Then afterwards only take it out when you know...