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Author Topic: no heat  (Read 1062 times)

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Offline new2jeepguy

  • Budget Lift
  • Posts: 143
no heat
« on: November 10, 2011, 10:10:39 AM »
I  put a new rad in,   new thermostat too  as I had a rad leak.  Now I've got heat but it,s not very hot???????  its  the 4litre engine   any ideas?????the thermostat I  put in is a higher temp one  so it should blast out real hot but noooooooooooooooooooooooooooooooo!
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Offline esi

  • That CB Yapper
  • Posts: 633
Re: no heat
« Reply #1 on: November 10, 2011, 10:15:38 AM »
Airlock in the system
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Formerly of Boots & Boost Inc
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Offline TL-Iguana

  • Talks waaay too much!
  • Posts: 1117
  • XJ - The Official TJ Rescue Vehicle
Re: no heat
« Reply #2 on: November 10, 2011, 11:24:42 AM »
Yeah, sounds like you have air in the system. Take the rad cap off with the engine cold, start up and run it till its hot, with the heat on high. Should hopefully circle the coolant through the system and push the air to the top of the rad... Of course if your heater core hoses are higher than your rad cap then the air will go to the highest point.. but this is most likely whats happening. Unless your thermostat went in upside down...  in which case its not flowing any coolant :)
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I did a Google search for "hot trannies" but nothing came up about oil coolers  :o

Worrying too much about mpg with a Jeep is similar to worrying about your sister's virginity. An ok thing to be concerned about but...

'01 XJ on 35s, '11 Jk DD

Offline new2jeepguy

  • Budget Lift
  • Posts: 143
Re: no heat
« Reply #3 on: November 19, 2011, 05:27:22 PM »
thanks i,ll try the air lock thing
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Offline SkatersTj

  • Budget Lift
  • Posts: 123
Re: no heat
« Reply #4 on: November 20, 2011, 11:53:08 AM »
I have the same issue, little heat on low settings but on high it's cold air almost. My friend suggested it's the heater core needing to be replaced? Could that be the issue, -20 sucks driving to work in the morning
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1997 Tj sport 3" lift 31's
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Offline new2jeepguy

  • Budget Lift
  • Posts: 143
Re: no heat
« Reply #5 on: November 20, 2011, 12:04:51 PM »
yup it was suggested that i run      C.L..R.    thru the heater core and c if that helps  if its not an air block  issue   hmmmm   may be both   when i flushed out the system it was full of discolored crap and sediment   I flushed the heater core out both ways and it was better but I guess it could still be crappy and semi plugged inside      any one/ have a heater core?
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