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Unread 02-19-2013, 06:26 PM   #46
97_4popper
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1990 MJ Comanche 
 
Join Date: Jan 2005
Location: Guston, KY
Posts: 463
If heater core is bad, it would probably be leaking.
Check your thermostat. that may be why it doesn't blow warm.

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90 MJ 4.0 4X4 5sp LB Pioneer Big Ton.
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Unread 02-20-2013, 07:20 AM   #47
Mishimoto
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Join Date: Apr 2012
Location: Wilmington, Delaware
Posts: 409
Quote:
Originally Posted by 97_4popper View Post
If heater core is bad, it would probably be leaking.
Check your thermostat. that may be why it doesn't blow warm.
+1, unless the core is clogged and restricting coolant flow.
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Unread 02-21-2013, 08:35 AM   #48
donutman07
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1987 MJ Comanche 
 
Join Date: Sep 2012
Location: lainsing, michigan
Posts: 27
my friend and i somewhat cleaned out the heater core by flushing out a bunch of what looked to be rust and gunk, we flushed it out with water, and when he drove it over to my house he said that there was a little bit of heat comming out of it now.
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Unread 02-21-2013, 04:58 PM   #49
donutman07
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1987 MJ Comanche 
 
Join Date: Sep 2012
Location: lainsing, michigan
Posts: 27
i took irt fora little drive out back behind the house and had to use the 4wd and now the 4wd light is staying on does anybody have any ideas on what i should check? any help would be much appreciated
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Unread 02-22-2013, 10:48 PM   #50
carnuck
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1984 J-Series Truck 
 
Join Date: Nov 2004
Posts: 3,212
Probably bad hose or the switch on the trans is stuck.
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