Coolant leak

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Aug 17, 2020 | 06:47 PM

Samuel Foote

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Coolant leak

ok so first I replaced the water pump and thermostat both were necessary (water pump only had 3 fins on it out of i believe 9 or so and there was no thermostat in it) still losing coolant then I replaced intake gasket and ran a cold compression test all but 3 cylinders were dead up at 150 very front passenger side cylinder was 3-4psi low the third cylinder from the front passenger side was 2-3 psi high and one on drivers side was 2-3 high i am still losing coolant no water in oil no crystallization on spark plugs found where it is dripping on passenger front of exhaust manifold however I couldn't see where its coming from examined around the intake with a light and cannot see any water anywhere around it or in the valley of the block please help also it leaked about 2 ¼ gal in a day given i drove about 130 miles the leak i found doesn't seem to be more than about what ac condensate is normally slow drip

Aug 18, 2020 | 09:14 AM

steve(ill)

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see if it is running out of the bell housing between the motor and the transmission... There are a couple freeze plugs on the backside of the motor and may have a pin hole from corrosion.

Aug 18, 2020 | 09:17 AM

steve(ill)

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see photo in first post below.. You may have a different motor, but similar plugs

https://www.ford-trucks.com/forums/1...-question.html

Aug 20, 2020 | 06:12 PM

z31freakify

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From: Las Cruces New Mexico

Assuming it's a 4.6 or 5.4 these engines are notorious for leaking cross over on the intake manifold and engine valley coolant line to heater core line.