Heating the passengers

[billschroeder5842]

Hey All!

Now that the seasons have turned, my A/C is on hold and my heaters is more important to me.

Because of the Texas heat (over 100 for months at a time) I run a 165 thermostats and have never had any cooling issues.

However, the motor and collant does not heat up enough to warm the passenger compartment adequately. And when I do get some heat, it seems to come and go as the thermostats opens and closes. My radiator, hoses are core are newish.

Short of changing the thermostats to a 195 or higher, is there anything I can do to warm the passengers?

Thanks!

[XS29L9Bxxxxxx]

Blankets? Thermal underwear? 

I had a similar issue w. a low-temp thermostat. 160* was too low and heater was ineffective

[Benji]

Sounds to me like you have some trapped air in the heater core which prevents the coolant from completely warming the entire coil.  I would remove the hose that goes to the top of it from the cold engine and pour some coolant into the hose while holding it up high.  Take the radiator cap off and when it begins to overflow stop pouring, pinch the hose and reattach it.

Ben

[b5blue]

Check the valve that controls the flow of coolant or remove it, back flush the core also just to be sure it flows well as some crap could have found its way in there. I was in Tex. for a few years and it can get darn cold, you may just need a higher T stat like you mentioned. ( I got a TON of crap out of my core in my Jeep, but only when it was back flushed, I rigged a garden hose direct feeding and let it rip with a drain hose running down on the ground. By pinching the hose and letting pressure build then releasing it it would surge and drag more crap out.) 

[elacruze]

I agree, you probably have air in the core or the water valve isn't opening completely. 165* should be plenty enough to keep you warm if it's filling the core.

[BrianShaughnessy]

How about trying a 180?

[billschroeder5842]

Thanks for the suggestions--I'm going to try the flush and see what happens first.
Just got done driving it on a short errand and with it about 50 degress today, the car never warmed up.

[Brightyellow69rtse]

drill a tiny hole in the t stat i do that with everything i own. since i started doing this i have never had a air bubble give me problems.

[b5blue]

That's a good idea, it's mandatory on early Jeep Cherokees with the "closed cooling system".   

[Charger RT]

if you drill the hole don't go bigger then 1/16 of an inch bigger could effect heat.
Tim