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Old 10-21-2009, 10:50 AM   #1
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Need hotter air

how do i get my heater blowing real hot... eez not so good

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Old 10-21-2009, 10:52 AM   #2
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My heater is very hot after only 1/2 mile.
Perhaps your heater is dirty? I would try a coolant addition that cleans the coolant lines.

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Old 10-21-2009, 10:59 AM   #3
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i havent done a coolant flush since ive had it, would nice new coolant help alot!
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Old 10-21-2009, 11:01 AM   #4
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check to make sure your vacuum line to the engine is connected
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Old 10-21-2009, 11:04 AM   #5
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^ good start, i'll do that. It just takes so long for my air to heat up to where it doesn't feel cool on my hand coming out of the vents, and never really gets to warm
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Old 10-21-2009, 11:05 AM   #6
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Heater cores often get clogged, flush it with a hose in both directions until it flows well in both directions. Flushing the cooling system won't usually help.
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Old 10-21-2009, 11:07 AM   #7
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I had that problem last winter where the Jeep was warmed up and the air coming out was luke warm almost cool. Turned out the vacuum line kept coming off the barb on the engine block (driver side rear)

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Old 10-21-2009, 11:11 AM   #8
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^ and ^^ very good info. I will check for that hose being cracked or pulled off. and it may be a good idea for me to do a good flush any how.

Jerry is there a good thread or printout that shows this flush procedure?

Shankyou
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Old 10-22-2009, 08:12 AM   #9
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do i flush the heater core at the fire wall? disconnect both hoses on the motor and pump through one and collect from the other? what do i pump through it? and how do i fill it back up after
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Old 10-22-2009, 09:36 AM   #10
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The cooling system is a closed system. You can start anywhere. Just make sure you flush both ways a couple of times. Also makes sure you catch the coolant. I thinks its illegal to dump it.

Filling it up can be done a couple differant ways. I usually just fill up the radiator then turn the jeep on. As the air bubbles, circulate the level in the radiator will drop. I just keep filling it up till it doesn't drop anymore. Then fill the overflow bottle and keep an eye on the level for a couple days of driving.
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Old 10-22-2009, 09:38 AM   #11
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how are you guys flushing it, with water from a hose?
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Old 10-23-2009, 07:22 AM   #12
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Couldn't it be a thermostat problem? Whitch is better 180 or 210 in cold weather below 32f?
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Old 10-23-2009, 09:48 AM   #13
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Couldn't it be a thermostat problem? Whitch is better 180 or 210 in cold weather below 32f?
A 195 degree model thermostat is what the TJ requires, I've never seen a 210 degree thermostat.
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Old 10-23-2009, 09:56 AM   #14
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A friends heater didnīt work good in his ZJ. After using a coolant system cleaner and refilling the coolant system it worked good again.

ER Cooling System Cleaner and Rust Remover
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Old 10-23-2009, 05:31 PM   #15
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Could it be a air damper problem letting in a mix of cool outside air/heated air? I have seen problems with this before when vac. hoses get unplugged or cracked and the pneumatics don't work properly.
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Old 10-23-2009, 05:39 PM   #16
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Alright, so i flushed just my heater core and i got some nasty pea colored rust colored nastyness. I flushed one way then the other, until all that i was getting was a solid stream of clear water.

I then realized i should flush the rest of the system since the coolant was shot. I did so and filled her back up with some bright green goodness.

Heat is hot hot hot and really quick!

Thanks for all the help with suggestions
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Old 10-23-2009, 05:46 PM   #17
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Originally Posted by mudslinger150 View Post
^ good start, i'll do that. It just takes so long for my air to heat up to where it doesn't feel cool on my hand coming out of the vents, and never really gets to warm
that points directly at a stuck open thermostat if you ask me. i dont think the thermostat is any more than like 5 bucks and should be really simple to install unless jeep does something weird with it. iv never done my jeep but the normal place for a thermostat is where the top radiator hose connects to the engine, and its normally just 2 bolts.

edit: looks like you fixed it, nice going.
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Old 10-23-2009, 05:51 PM   #18
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Quote:
Originally Posted by mudslinger150 View Post
Alright, so i flushed just my heater core and i got some nasty pea colored rust colored nastyness. I flushed one way then the other, until all that i was getting was a solid stream of clear water.

I then realized i should flush the rest of the system since the coolant was shot. I did so and filled her back up with some bright green goodness

pics or it didnīt happen.


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