Posted by Determined on November 24, 2018 at 10:13:58 from (216.130.212.201):
In Reply to: GM 2.2 forklift engine posted by Jeff nwoh on November 24, 2018 at 08:56:59:
Just a few things to think about.
Forklifts are notorious for having oil that look like a milkshake.
Rarely ever get up to temperature to burn off condensation. Typically sit until a truck shows up, get used for 10 minutes then shut down again.
Would have been better to have done a pressure test before tearing it down but too late now.
Might be quicker/cheaper to throw it back together for the cost of a gasket and see what you get.
Looking at the valves I would say it is not leaking coolant into the cylinders.
If you had a gasket fault between an oil pressure passage and a coolant passage you would be getting oil in the cooling system as the oil pressure would be higher than the cooling system pressure when cold.
I do not think there are any pressure passages going to the cylinder head on your engine.
As a forklift hardly ever runs long enough to build pressure in the cooling system a gasket failure allowing static coolant into the oil should have been fairly obvious to see and would likely have made the oil level on the dipstick show a few inches higher than full.
It does not take very much condensation to give the oil a milky appearance.
If the oil gets badly contaminated with water/coolant it will destroy the bearings in short order.
Holding a teaspoon of the oil over a propane torch will give you a pretty good idea of how much coolant is in based upon how long it sizzles and spits before it clears.
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