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post #1 of 6 Old 12-17-2007, 01:35 PM Thread Starter
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Ok I have read the forums as I hate to ask repetitive questions and I have found many people have upgraded the heater and defroster in there Jeep BUT they have the 4.0 engine.

I have a 2.5 stock and the heater puts out very little heat and hardly blows. Has anyone upgraded there stock 2.5 and can give me a few options? Much appreciated.


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post #2 of 6 Old 12-17-2007, 01:36 PM
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1990 YJ Wrangler 
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I thought all that stuff was the same no mater what engine you have, am I wrong in thinking this?

1990 YJ, Colorado Red with 'Laredo' markings, 4.2L, TF999, NP231, Valvoline Syn fluids, Weber 32/36, Nutter Bypass, Dana 30/35, 16" Electric Fan, Optima Yellow Top, 140amp alt., K&N Air Filter, Cherry Bomb muffler, SRC Front Bumper, CH&F Shackles, KC 100w Daylighters, Homemade Lightbar, Rear Aux lights, Cobra CB/PA/WX, 102" Whip Ant., 400 watt power inverter, 2 fire extinguishers, Mobile Internet & WiFi equipped.
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post #3 of 6 Old 12-17-2007, 01:48 PM
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1989 YJ Wrangler 
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Flush or replace the heater core, check or replace the thermostat, make sure the actuator cables are hooked up. One of those will make you sweat!
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post #4 of 6 Old 12-18-2007, 12:35 PM
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2000 XJ Cherokee 
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i have a 2.5l and the blazer heater motor works great. I just upgraded it about a week ago. what a difference. just go get part number pm102 at AutoZone and switch it out. if you search "heater upgrades" you will find step by step on how to do it.
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post #5 of 6 Old 12-18-2007, 01:46 PM
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1985 CJ7 
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I have to turn the blower down to the half setting after the water temp hits 180 because it gets too hot

As far as I know, mine's stock.

Cowl vent clogged? I pulled a ton of leaves out of mine before winter.

Also, thought this was somewhat relevant here, might build them:

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post #6 of 6 Old 12-18-2007, 02:04 PM
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1961 CJ5 
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My Jeeps like a nice and toasty until I get on the highway.
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