Help! Coolant problem. | Ford Explorer Forums

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Help! Coolant problem.

Fhantazm

Well-Known Member
Joined
January 31, 2003
Messages
863
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City, State
Bristol, Tn
Year, Model & Trim Level
91 Navajo LX 4X4
Ok,
Before i start I have done a search, about 4 pages deep, and havent found too much on my problem. Im hoping you can help!

Ok, I just took a 600mile road trip through the VA Mountains, and had a problem on the way back. The truck did perfect on the way there, but on the way back I noticed the temp guage at about 3/4 to the right. It has NEVER been this hot, so I pull over. When I pop the hood, I am greeted with a billow of smoke, and a loud hissing from the passenger side of the engine. I look under the truck, and see a small stream of coolant leaking down onto the axle. It wasnt pouring out, but I could tell it leaked. I also noticed a little spray on top of the engine. The truck was too hot to dig into it, and see where it was coming from, but i did notice it was at the front-passengar side of the engine. I filled it up with water/coolant, and went on my way(didnt have a choice). The truck did great all the way home, never got to the halfway point on the temp guage. Well I get home, and in my driveway, and the temp shoots up to about 3/4 I see smoke, and hear the hiss again. I crwal up under the truck, and see coolant falling. This time it appears to be falling at a faster rate. Now its currently storming out, and dark, so i cant tear into it, but im hoping someone could tell from the location I gave, something about this leak. Remember the truck runs perfect(temp did NOT go into the red zone), no white smoke, nothing, except the leak. Once again, it appears to be coming from the front, passengar side of the engine, about halfway down. The radiator hose does not appear to be leaking. Any insite into this would be great. I know I havent given you much info to work with, so thanks in advance for your buest-guesses. :)
 



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Could be the heater core. It has a drain on the passenger side. However, the location of the leak could be a faulty heater hose (s). A simple test of the heater core is to by pass the heater core (connect the inlet and out let hoses together and see if the leak continues.

Since you have an early 90's version, the replacement of the heater core is very easy.
 






Front passenger side is also where the upper radiator hose comes off the engine and goes into the radiator.
 






Are you sure its not coming from underneath the water pump? It could be coming out of the weep hole which is on the bottom side of the water pump. My Ranger water pump failed this way.

If true, it means you need another water pump because the pump seal has failed.
 






look at heater control valve located in yhat area
 






Ok Ill check those out. Thanks!
-Alex
 






Could be your headgasket, thats what happend to my 91...:(
 






But theres no sign of it being a headgasket. No smoke, engine purrs like its new.
 






Mine did the same thing. Ran perfect, would overheat ocasionally, with the white smoke and everything. A leaky head gasket wont nessisarily make the engine run any different. I havnt replaced it yet, but its on my list of things to do.
 






Originally posted by towdriverb
look at heater control valve located in yhat area

I'm pretty sure early Explorers didn't have a heater control valve.
 






Lower intake manifold Gasket. I'll put a 100 bux on it.

Ryan
 






Problem fixed! Heater hose blew. :)

So uhh, Ryan, when can you send me a check?? :D :p
 






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