Weak Heat

[bigbry]

I am asking for a non-FSJ friend.....

He has a 86 Jeep Commanche with weak heat, he has a new radiator, hoses, thermostat and still the heat is pretty weak.....

Not a Full Sized but still a jeep, can anyone give a hand?

thanks in advance

[bigblack'74]

there is a good chance that heater core is internally plugged with rust and crap or more probable is that the fins on the heater core's outside are clogged with a dirt like mix. i have replaced 2 in the past 2 weeks on a car and a van. this time of the year is when you see this the most.

[1nathan]

is the valve that operates the heat working? When the heat lever is moved, does it also move the part in the engine compartment?
Not much, but worth a try.
Nathan

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Nathan Van Meter

'87 Grand Wagoneer,3" spring lift,31"X10.5" Dunlop RV,Front Receiver,Factory Brush Guard,360 V8, NP229 & 727,Edelbrock Intake & carb.

'87 J-10, 3" Body Lift,1.5" Add a Leafs, 35" BFG Mud Terrains, Factory Brush Guard, 360 V8, NP208 & 727, Holley Pro-Jection, Jacobs ignition

'81 GW " parts truck ", 360 V8, NP208 & 727, 130K on odometer

[reddog]

If I remember correctly (don't laugh!!) the Commanche is one of those thoughtfully engineered vehicles where the radiator is lower than the hoses so that the fill is not on the radiator. I believe there is a specific procedure on how to purge the air out of the system but I can not tell you what it is. I recall reading something on this before but I don't know if it was here or elsewhere. Search the archives. Sorry.

I searched the archives and found this -

http://www.ifsja.org/ubb/Forum2/HTML/001653.html

WOW all the way back in November - no wonder I couldn't remember http://www.ifsja.org/ubb/biggrin.gif
Kerry

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87 GW - Stock (but it looks like RiverBeast when I'm sleeping)
TFI upgrade
360,727,NP229

[This message has been edited by reddog (edited February 03, 2001).]

[Slippery]

Kerry,
That only applies to 4.0s. An '86 (1st year of MJ production, btw) would be either a 2.5 or GM 2.8. http://www.ifsja.org/ubb/wink.gif

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Jason K. http://cwm.ragesofsanity.com/s/net4/icon16.gif
"The only vehicle I have that I can haul an engine in, doesn't have an engine in it."