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Heater core bypass

Discussion in 'The Garage' started by hi pinion, Jan 8, 2005.

  1. hi pinion

    hi pinion 3/4 ton status

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    Theoreticly, can a guy bypass a heater core, and loop the lines, together, while awating parts for the heater core install? Or would that hurt anything? Someone told me to just loop the lines, until my new heater core parts get in.Thanks guys , jake:)
     
  2. big83chevy4x4

    big83chevy4x4 3/4 ton status

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    yep, do it all the time here in the SUMMER.
     
  3. darkshadow

    darkshadow 1 ton status

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    they are different sizes so that might interfer.

    i had my core wired up under the hood when swaping over to non ac
     
  4. big83chevy4x4

    big83chevy4x4 3/4 ton status

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    oh, i forgot about that.

    seems to me i streched the little hose over the big fitting, then just cut that little bit off once i hooked it back up.
     
  5. hi pinion

    hi pinion 3/4 ton status

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    Thanks guys, i have an array of copper fittings to loop the 2, so that wont be a problem, later jake:)
     
  6. R72K5

    R72K5 Banned

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    yep no big deal, or install water pipe plug fittings in intake and waterpump

    or maybe you have port on radiator tank instead of on water pump

    hmm
     
  7. hi pinion

    hi pinion 3/4 ton status

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    It was just a general question about bypassing the heater core (cough) (furd) cough....:grin:
     
  8. rjfguitar

    rjfguitar 3/4 ton status GMOTM Winner

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    :rotfl: Still working on it huh....

    So now you are doubting my advise? :mad: :p: Napa sells a fitting that can go from one size hose to the other. I have a coupling do bobber mating the 1/2" inlet to the 3/4" outlet on the heater core. For some reason if I plumb in my heater core my engine overheats. :confused:
     
  9. 88sub4x4

    88sub4x4 1/2 ton status

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    Have you checked to make sure the heater core is not plugged/clogged?
     
  10. mikey_d05

    mikey_d05 1 ton status GMOTM Winner

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    Someone correct me if I'm wrong here but a heater core is basically a second, albeit much smaller, radiator that vents into the passenger compartment. If your truck overheats with the heater core plumbed in, it's almost certainly plugged or obstructing flow of coolant somehow.
     
  11. RustBuket

    RustBuket 1/2 ton status

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    That sounds logical to me. And yes you're right about the "mini radiator" theory.
     
  12. Muddytazz

    Muddytazz 1 ton status

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    Yes it is basically a second rad, but you CAN have a plugged heat core and NOT have your engine overheat
     
  13. rjfguitar

    rjfguitar 3/4 ton status GMOTM Winner

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    Nope, it's clear and clean. It is probably not worth discussing because I made numerous threads about it months ago when I was trying to get it to not overheat. No one could figure it out pretty much because actually it doesn't overheat....it screws up the flow of the coolant somehow because the guage will jump up to 260 in about 3 minutes, shut the engine down, start it up 30 seconds later and it reads 170 again. It is like the coolant flow stops for some reason as the pressure builds in the cooling system, but when the engine shuts down it releases the pressure and the coolant can flow freely until the pressure builds back up after a minute or so of the engine running again. I originally thought the air from the heater core was being pushed into the engine as it fills with coolant so I primed the heater core first one time, didn't make one bit of difference. That is the best I have come up with.
     
  14. hi pinion

    hi pinion 3/4 ton status

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    Excuse me Bobby, but, this isnt about you, and YOUR truck overheating, its my thread, and my heater core bypass thread, NOT yours, so butt out.What do you think this is anyway? A public forum? :D j/k , later,:grin: jacob
     
  15. rjfguitar

    rjfguitar 3/4 ton status GMOTM Winner

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    I'll mow over your topic whenever I feel the need, punk. :D SO did you get the lines plumbed together? Pinhead. :D :p:
     
  16. dirtwarrior17

    dirtwarrior17 Banned

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    diggin through the thread graveyard

    If you complety disconect the heater core and block off the intake hose from the radiator it will be fine. Won't overheat.
     
  17. rjfguitar

    rjfguitar 3/4 ton status GMOTM Winner

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    Um, yeah. It's been that way for 2 years. :whistle:
     

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