Have a 93 Ford Explorer with the 4.0 Litre, have replaced the radiator, all hoses, raditor cap, thermostat, water pump, had a 10 minute pressure test performed and losing coolant. Engine does not miss or backfire no visible signs of where coolant is going. Replacing close to a gallon a week ideas? Do seem to have an abnormal amount of condensation out of exhaust pipe. Think maybe a bad headgasket, cracked head, or intake manifold gasket, just need some confirmation or test I can use to help determine the need to tear into the engine.
mine would seep out the front intake gasket by the thermostate you couldn't see it but you could get a wiff of it then it blew one day we replaced the intake gasket but then the head gasket started to leak
FORDS always look better when pulling a CHEVY
Hmmmmm Whatever it is isn't normal. I'm voting head gasket. Whatever it is keep in mind that your O2 sensors don't like smelling anti-freeze. Check your spark plugs....a really "clean" one can mean that cylinder has been burning water. If coolant hasn't been maintained properly there is also a good chance you could have a freeze plug leaking. The intake manifold is also prone to leak at the gasket and sometimes re-torqueing can solve that.
My '95 was loosing a quart a week with no visible drip anywhere, (frustrating). Checked everything I could think of with no luck. Finally it turned out to be the heater valve on the hoses near the engine firewall. Was dripping on engine and evaporating. No too expensive or hard if you have to replace. Good luck, ROY:-)
Do you smell antifreeze in the interior ?
Chk your heater core ,pass side ,lift the carpet look for wetness.
Look for bubbles in the coolant if you think headgasket.
If your losing that much ,you'll find it!
I have a '93 XLT with 110K on it and started noticing coolant dissapearing a while back. The morning I wanted to leave for Big Bear with my family, it finally decided to reveal where it was leaking. After driving about 3-4 miles and stopping, there was a flood of coolant pouring out around the starter. Turned out to be the gasket failed at the rear passanger side of the intake manifold.