Ford - Explorer :: Leak Fluid Out Of The Thermostat Housing
Dec 26, 2012
My explorer with 4.0 sohc is starting to leak fluid out of the thermostat housing. How hard is this to do and what can I expect in cost to do it myself. I dont drive this explorer but about 2 miles each way to work as I live on a military post. I have been putting it off ( just keep adding coolant and water) every couple of days. I have noticed that the engine temp doesnt not get up to half way like it use too. Maybe 1/4 of the way on the gauge now. I have always flushed coolant system very two years. It is starting to get some rush in the overflow bottle now too. Other then that she runs good and no other engine issues. She does have a 136k on her.
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I set out to do a coolant flush but ran into an increasing number of problems. When I went to replace the thermostat I discovered one of the three bolts would not come out due to the inside thread on the thermostat housing being stripped. I purchased a brand new housing and O-ring.
When I reinstalled the thermostat (also Motorcraft brand) with the above O-ring and attached all the hoses I had a severe leak between the thermostat housing and the intake hose connecter. I diagnosed the problem as the O-ring slipping off of the lip or ledge inside the thermostat housing and not sealing all the way around.
The Motorcraft O-ring seemed like the diameter was too big for the interior lip of the thermostat housing because the ring would pop up on one side whenever I tried to fully seat it on the interior lip. I went to AutoZone and purchased an orange Duralast O-ring, and while it seemed to be a little smaller diameter than the Motorcraft it too slipped off when I tightened down the housing.
I have tried everything, and every time I tightened down the housing I did it very slowly and carefully doing an 1/4 turn at a time with the three bolts but still the O-ring would slip off.
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So I noticed when I check the oil, there is a very small amount of water at the end of the dipstick and also water mixing with oil around the oil cap. It is not much water at all, but my first thought was head gasket. I was loosing very small amounts of coolant, but found a small leak at the thermostat housing....The truck runs fine, idles fine, no bubbles coming from the radiator at startup, no moisture from exhaust. It seems to be using more oil than normal, but I drive it 100 miles a day still and no major issues other than the perplexing bit of water and oil mixing. Could it be a tiny head gasket leak? What else would cause the water and oil to come together.
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I'm trying to figure where the coolant leak is. Appears to originate on the driver's side front, right near the thermostat housing. Since the engine tilts back the entire drivers side is wet. The thermostat gasket appears to be OK, but it does have a lot of miles on it.
If it's not the thermostat then can coolant leak from the cross over tube. And is the cross over removable without taking off the intake. There appears to be a bolt coming up from underneath on the passenger side.
Also, does coolant flow through this plastic intake. If it does, then the leak could be some where else, if not, then it's probably the thermostat.
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I have a coolant leak coming from I am assuming the thermostat housing or thermostat. My question is, is there a gasket behind this that I am assuming is bad or is the thermostat bad.
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I have a 95 skylark 4 cylinder, i have what appears to be a coolant leak from the thermostat housing and i also have coolant mixing with my oil. Can the leak from the housing cause the coolant to mix with the oil? If not what else could be the issue?
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Finally got around to replacing my Thermostat because the DIY here made it look so much easier than removing the alternator and such. Did everything exactly as described and after assembling everything with the new t-stat and O-ring I am getting a constant leak from the housing. I tried removing everything and reassembling...all the bolts are tight. Plastic housing isn't cracked and seems to be in great shape. Everything lines up properly but coolant is just running out of the bottom of the housing. Am I missing some magical trick here?
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My serp belt started squealing so I pulled the thermostat housing to inspect the rubber gasket. It looked OK, but I cleaned up both surfaces and replaced with a new gasket, and put it back together. The housing was replaced just a couple months ago along with new hoses. It was not corroded and OK to reuse.
Started the truck up and saw a slowish/steady drip of red Cat ELC dripping on the driveway. Opened the hood up again and carefully inspected around the thermostat housing - no coolant is leaking there.
I did notice the same slow/steady drip coming from just behind and beneath the thermostat housing. See in pic, this is where it is dripping. One other question, what is this plug for on the side of the water pump?
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I just recently had to replace the extension housing on my truck. Well after doing so I went to start it up and top off the tranny fluid and it started to leak out on the left rear side of the transmission near the extension housing. Ive looked and looked and found that the fluid is coming from the top right in front of the extension housing but when i clean it off there seams to be no holes or cracks. It isn't the housing seal, cause it pools in front of that. What could be the issue? My truck is a 01 F250 4X4 5.4L.
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'06 powerstroke, 215k stock
Doing a coolant flush, took the thermostat out but cannot figure out how to get it out of the housing.
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Tried to flush it and got as far as draining everything. I can't hook up my T and begin the flushing process because I can't remove the thermostat. I have a buddy who can get the bolt out but I'd have to be able to drive the truck to him. I've tried just about everything to remove it. I did manage to find some replacements for when I do get the last one out though .Is there a way to still flush this thing like maybe just hook up the hose to the t and run the engine with the heat on to open the thermostat?
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How I could take my ford explorer 2002 in to the shop to replace the radiator and come out with transmission fluid leaking. The mechanic said it is some kind of hose but it wasn't leaking before and after I drive I can see it dripping out. I'm just not sure if they messed up something. Unfortunately my husband is overseas and cannot check it.
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The rear differential center section on my wife's 02 Explorer has a slow drip that appears to be coming from the rear cover plate. I have worked on the solid 8.8 and 10.25 axles but never on a independent center section. Does the whole center section have to be lowered to change the seal on the cover? If so, do the axles have to be pulled to do so?
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So I tried to replace my thermostat and housing and the housing bolt snapped off. Ok so I tried to extract that bolt off and the extractor bolt snapped off inside. I am guessing it might just be easiest to replace the water pump now? I am pretty much at the end of my mechanical rope which is short anyhow.
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So I was replacing thermostat in 98 lumina 3.1 and use the wrong bolt for the upper bolt on the housing and it broke where it mounts onto the block. Now the housing won't seal over thermostat and just spread coolant everywhere... Is there an easier and less expensive way of fixing or do I have to get a whole new motor?
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Bought a 04 GLI had the bad engine, had the engine installed sat at the shop for nearly a year. Towed car to my house to finish it and now I am running into their lack of knowledge and fixing their crap. Now the current issue...On the thermostat housing, a nipple that comes off the side has nothing connected and leaking coolant.
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Daughters 94 f150 4.9L 204K miles e40d started leaking transmission fluid from the bell housing, so she parked it for 2 years...Now I have been nominated to fix it... Truck was running good when parked. Got it started (Just charged battery and started it up), and backed it up. Reverse is good and solid. When I tried to move it, it wouldn't move in drive. Starts to engage, then drops out. Pulled into first, and the truck moves, but have to have high rpm.
Replaced tc seal, filter and fluid, (12 quarts). No change... Ran it down the road, had to start off in first, good power up to about 35, shifted to second, it shifted...ran up to 45, then shifted into drive, it shifted, and maintained power. Had to slow so stopped and turned around, tried moving out in drive, and it just kept dropping out. Returned home as I left...read a lot of this forum, and learned some but not enough..
Pulled codes 327,116,536,538. No transmission codes.
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This makes the third Auto Zone thermostat that has failed in less than 75k miles. Who makes a good thermostat? The first was bad out of the box. Who's have you had good luck with?
2000 Explorer XLT 5.0 155k mi
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2000 Explorer: on the drivers side is what looks like a vent hose coming off the axle housing. Is it a vent and why??
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Getting a chirping noise coming from (i think) the bell housing. a few small chirps at start up, then constant after about 1300rpm, eventually gets high enough and drowns out behind the exhaust that i cant hear it.
Possible flywheel issue? I've uploaded a video to try and illustrate the issue. 1996 ford explorer XLT 4.0.
Just replaced starter a few weeks ago, but this problem was happening before. I dont know if it was as prominent and got worse, or if im just now noticing it and focusing on it.
1996 Ford Explorer bell housing chirp. Flywheel? - YouTube
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A little background info...up until about 6 months ago my 01 Ex V10 was a grocery getter for the wife; only got a few thousand miles a year for the most part. Since we moved from Washington state to Texas it has turned into my daily driver (after a 2500 mile drive towing 8k trailer).
A couple of weeks ago we were running errands and after we got home there was smoke coming from under the hood, but I couldn't pin point it. I let it be because I figure it would let me know when something was really wrong. A few days later it did it again but this time I found the problem; transmission fluid was leaking out of the bell housing onto the y-pipe. I did my research and come to find out it is most likely the front pump seal that got soft from overheating. So my buddy and I drop the transmission and replace the seal. Put it all back together and everything seems great.
Another week goes by and we have driven the Ex fairly extensively around town and even took a couple short day trips and everything is great. Then as we are turning onto an on ramp to get on the highway I give it gas to speed up and all of a sudden the RPMs climb like it dropped into neutral. I had enough momentum that I got over onto the shoulder and started to check thing under the hood. Looked like I was low on trans fluid; ok so I added a quart. Put it in "D" and still nothing. Then I try "1", "2", "R" and they all work fine.
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