Okay guys and gals I have an issue that I need help with. I need to figure out what is going on with my Jeep heat. This is the first winter that I have had this jeep and as the temps are dropping I noticed that it is not heating like it should. I have flushed out the heater core and it did not help. The issue I have is that it will not heat. It only gets luke warm. I am leaning toward that it is my thermostat. The reason I say this is because my running temp only gets to 210 if the Jeep is sitting still at an idol. The moment I start driving the temp drops (see pic). Any help would be greatly appreciated.
TJ Heater
- Thread starter lpbosch
- Start date
Thank you. Do you know of anywhere I can find a write-up on how to do that? I haven't changed a thermostat on a jeep in a very long time.
JPNinPA
Active member
2x on the thermostat.
I'll post up a link. It is fairly easy. Some things to consider:
OEM, Stant and NAPA are best.
Do not buy a fail safe type as they will fail
OEM has a bleeder hole above the valve. You could drill a hole in other mfg just be sure to align the hole toward the top to help bleed air out.
Make sure you get a new gasket
Clean all of the old gasket off both engine and housing.
Caution that the thermo sits in a recess and tends to pop out while reassembly. I use a small amount og gasket prep on the gasket to let the gasket hold the thermo in place.
Allow at least a half hour of drying after assembly if you prep the gasket
Do not mix coolant types. Use HOAT or Zerex G05.
Replacing a Thermostat - Quadratec Jeep Forum
I'll post up a link. It is fairly easy. Some things to consider:
OEM, Stant and NAPA are best.
Do not buy a fail safe type as they will fail
OEM has a bleeder hole above the valve. You could drill a hole in other mfg just be sure to align the hole toward the top to help bleed air out.
Make sure you get a new gasket
Clean all of the old gasket off both engine and housing.
Caution that the thermo sits in a recess and tends to pop out while reassembly. I use a small amount og gasket prep on the gasket to let the gasket hold the thermo in place.
Allow at least a half hour of drying after assembly if you prep the gasket
Do not mix coolant types. Use HOAT or Zerex G05.
Replacing a Thermostat - Quadratec Jeep Forum
Last edited by a moderator:
I've never heard of an air bleed hole in the thermostat, but it makes perfect sense though.
About that video - I feel like we should chip in and buy that guy some new gloves.
About that video - I feel like we should chip in and buy that guy some new gloves.
JPNinPA
Active member
OEM thermo above. Also 49 sec in video.
Home drilled below (good enough) though the lower thermo has a smaller valve. Bigger is better as well as wider opening.
Wasn't the top video but basic and not 20 min long. I think my tips and the other link are sufficient.
Gloves and a camera stand.
Last edited:
SteelHeadz
Super Moderator
Another term used on this thermostat bleeder is a poppet valve.
Sent from my iPad using Jeepz
Sent from my iPad using Jeepz
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