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I'm going insane. Overheating again.

Discussion in 'Stock 1995 - 2001 Explorers' started by NickRT, August 16, 2018.

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    1. bigewalksalone

      bigewalksalone New Member

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      No have not changed radiator cap,good idea I'll try that next..
       
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    3. imp

      imp Well-Known Member

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      @koda2000
      Know this is old, but, please keep in mind 160 psi cylinder pressure is DURING cranking. Running, combustion pressures run many hundreds of psi, often as high as 1000psi, and, those are HOT gases, not cold. In the big diesels, injectors (within combustion chamber, unlike our car engines) must "push" fuel in at way over 1500+ psi (instead of 40-60), sometimes over 2000, because cranking pressures are 800psi+ and combustion pressures may approach 2000. imp
       
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    4. koda2000

      koda2000 Explorer Addict

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      Good point IMP.
       
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    5. bigewalksalone

      bigewalksalone New Member

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      Yea I know it's not good . Hey I noticed today while filling the resorvior,I could smell
      gas in the resv. ??? what you think?
       
    6. RandomNerd2000

      RandomNerd2000 Well-Known Member

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      Gas in the resv? That's not good, head gasket or cracked head is my bet. Any time you have that or coolant in your oil, that's nothing good.
       
    7. koda2000

      koda2000 Explorer Addict

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      Head gasket, or cracked head.
       
    8. imp

      imp Well-Known Member

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      Bad news, sad to say..... imp
       
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    9. fast_dave

      fast_dave Active Member

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      Advice for NickRT, the OP of this thread:

      Here's the pre-snoflake, old school, fan clutch test procedure ;-)

      Obtain a length of water pump hose and fold it over once.

      When the truck is warmed up and idling, CAREFULLY insert and jam the folded over end of the hose into the spinning fan.

      If the fan stops spinning - your fan clutch is bad.

      If the fan is able to overcome the resistance offered by the rubber hose and continue spinning, the fan clutch is good.

      Hope that helps -
       
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    10. koda2000

      koda2000 Explorer Addict

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      LOL... I suggested doing something like this several years ago and everyone thought I was insane.

      Shade Tree Forever!
       
    11. donalds

      donalds Elite Explorer

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      I use a news paper the Sunday paper yeeyee
       
    12. RandomNerd2000

      RandomNerd2000 Well-Known Member

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      Sunday Paper is $3 here, the hose is cheaper and free if you maintain your truck.
       
    13. 974X4BLACKSPORT

      974X4BLACKSPORT Active Member

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      I just use my hand, if it come back bloody that means the fan is working good, if no blood then fan is not working properly.
       
    14. fast_dave

      fast_dave Active Member

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      Even better - of all places - I learned that method of diagnosis in High School Auto Shop, and it works.
       
    15. donalds

      donalds Elite Explorer

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      Lol I have a bin of old papers for a variety of reasons one of witch is my kids school projects
      I don't have a garden hose to cut up and I don't keep old radiator hoses bc of my dogs kids etc...
      my truck is very well maintained to the point I get picked on by my friends
       
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    16. NickRT

      NickRT New Member

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      A month later, I got a new cap and it seemed to help for a minute. Temperature fluctuated. Once it got to Op Temp I parked it in front of my house. Checked hoses and Reservoir. The coolant seem to rise a little but I also ran the AC and heat. I put the truck into drive, drove about 20 feet and it started to rise. My father was with me at the time and he insisted that I keep driving so I did and never ran so hot to the point where it went to the red but we turned around back to the house made it back without breaking it. I parked it and let it idle and the needle set in an unusual spot a little bit above normal operating temperature but this was a month ago and my motivation is back to fixing it. There is no milky oil, there is no smoke. And my father says that drilling holes in the thermostat would help I'm not doubting that but overall I think there's either head gasket problem or a massive air pocket somehow someway. May I remind everybody that this all happened after a coolant flush and also ran water throughout the system to get all the stuff out. When I took it on a test drive I had some car come out of nowhere and I pulled out in front of it to avoid the accident I floored it. this is an old car with 200,000 miles on it but I doubt that would break anything or cause it to overheat shortly after that little incident I was just outside my neighborhood and felt the floorboards get hotter the normal. I didn't think anything of it (nor did it overheat) I just wanted to go home and relax. When I took off the water pump I did find white particles and that seemed to be powdery when I scratch them off. I don't know if this was old sealant that the previous owner put in, and I flushed it out. Did I get scammed on this explorer?
       
    17. fast_dave

      fast_dave Active Member

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      Keep it simple.

      Your 2nd hand Ex has 200,000 miles on it - did you ever test your fan clutch as suggested?

      Just doing a visual inspection of the fan spinning is no indication of the fan clutch operating efficiency
       

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