Coolant loss
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Elder User
Joined: Aug 2000
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From: home
Coolant loss
92 F 150 5.0 ext cab. After replacing all the hoses, water pump, thermostat gasket, & checking freeze plugs & radiator I am loseing 6 ounces of coolant in 40 miles.Also new rad cap. Pulled all the plugs & they looked like new since I put them in 4K miles. Ran a compression check & all the same. give or take 5 lbs. Stuck a clean white swab in to each cylinder, no mositure. Is the intake manifold leaking?A little white smoke on a cool humid day, not thick. No milky sludge or brown crap in oil. Any ideas how to identify heads , head gasket or intake manifold is the problem. 
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Joined: Dec 2002
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From: Princeton, MN
Coolant loss
If you don't refill it will it continue to lose another six ounces every 40 miles? I had an engine once that insisted on running low on coolant all of the time. none in the reservoir and about 2 inches low in the radiator. If I didn't fill it back up it would quit losing coolant and run at normal temp at that level forever until I couldn't stand it anymore and filled it back up just to have it run itself back down to where it wanted to be.
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Elder User
Joined: Aug 2000
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From: home
Coolant loss
It keeps using coolant. Early today ran the engine till hot & pulled 4 hot plugs out.No steam Or mositure at plug hole or on plug. Ran the truck again & pulled second bank & no mositure.Still get some sweet smoke at exhaust. Is this what you would expect from a leaking intake manifold? On my Bronco II I even got steam out of the add oil hole. None here but the Brono II had badly cracked heads.
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Elder User
Joined: Aug 2000
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From: home
Coolant loss
Could not fix the problem with out tearing the engine apart. My 93 Ford Aerostar started doing the same thing. So traded them both in. I have factory shop manuals, a new Ford 4.0 water pump & thermostat with gaskets for sale just incase anyone needs them. Also two boxes of Ford 5.0 thermostat gaskets sent to me by mistake. Ten in one box & 9 in the other.The Aerotar manuals are for a 95, except the EVTM which is for a 93.
