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Help, overheating problem

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by 77k5, Oct 28, 2000.

  1. 77k5

    77k5 Registered Member

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    I have a 350 that is getting hot going up hills, and cools down going down hills, I've replaced all the normal stuff (new radiator, water pump, heater core, and a new therm.) and I have backed off on the timming. I've been told that a trany could cause the engine to run hot, the transmission lines were hot, I couldn't hold them for a second, Is this normal?
     
  2. 4GUNZ4X4Z

    4GUNZ4X4Z 1/2 ton status

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    What kinda fan do you have? Clutch or direct?

    <font color=blue>Professional <font color=red>JEEP EATER</font color=red>, it's a population control thing.</font color=blue>
     
  3. 77k5

    77k5 Registered Member

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    I've had a flex fan with shroud, and a stock clutch fan on it with shroud, and now I have a 16 in. electric fan. It has done the same thing with all three fans.
     
  4. jarheadk5

    jarheadk5 1/2 ton status

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    I'm assuming auto trans...
    With everything you've done so far, I'd say it's time for a real transmission cooler. Get a good-sized one (20,000 lb. GVW) and your trouble should be over.

    [​IMG] Semper Maintenance!
     
  5. JimmyDie6.2

    JimmyDie6.2 1/2 ton status

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    I would definately recommend a tranny cooler. Also what temp. thermostat is in it?? Was it replaced?? try a 195. Also try prestones cooling system flush even though you've replaced a lot of cooling system items. Sometimes you get build-up in the block as well, this will clean it real well.......js
     
  6. 77k5

    77k5 Registered Member

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    I have a 160 therm. in it right now, I've had a 180 in it and a 195 and it really got hot. The engine now has about 2,000 miles on it. I have a trany cooler but I mounted it a little bit down, I thought it would help the air flow through the radiator, but that didn't work, What is being used as a tranny cooler really looks like the coils off of an old ac unit.
     
  7. Cavalry

    Cavalry 1/2 ton status

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    This may be kinda obvious but do you still have the fan shroud?
     
  8. DMK

    DMK 1/2 ton status

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    My das 454 vette was doing this, turns out the radiator was restricted towards the bottom. Radiator was rodded out and no more problems. Hope this helps.
     
  9. DMK

    DMK 1/2 ton status

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    Sorry did'nt see you repalced the radiator. Could it be a rstiction in the block?
     
  10. DMK

    DMK 1/2 ton status

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    Sorry did'nt see you repalced the radiator. Could it be a restriction in the block?
     
  11. WakeBoard&4X4er

    WakeBoard&4X4er 1/2 ton status

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    i was having the sameprob this past summer, but i have not seen it since i have staying out of OD in the hilly areas. Some things that i notices was it would not only get hot when i was going up a hill but if i had a strong head wind. I think that mine was mostly the trany slipping due to the extra power needed to push a barn down the highway. I am plainning to change my rear-end, when i get the money from 3.42 to 4.10 or 4.56, and i am hopping that that will help to. Let me know what you good info you get.

    brettmcox.coloradok5.com
     

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