Calgary Jeep Association

4x4 Related Groups => Tech Talk => Topic started by: new2jeepguy on November 10, 2011, 10:10:39 AM

Title: no heat
Post by: new2jeepguy 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!

Title: Re: no heat
Post by: esi on November 10, 2011, 10:15:38 AM

Airlock in the system

Title: Re: no heat
Post by: TL-Iguana 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 :)

Title: Re: no heat
Post by: new2jeepguy on November 19, 2011, 05:27:22 PM

thanks i,ll try the air lock thing

Title: Re: no heat
Post by: SkatersTj 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

Title: Re: no heat
Post by: new2jeepguy 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?