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
Well-known 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
Well-known 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
