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Heating & Cooling 2nd Gen Dodge Ram Heating & Cooling Problems and Questions.


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  #1  
Old 01-14-2010, 07:10 PM
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Default 1997 318 thermostat

ok..I too like alot of others is having a lack of heat problem. No heat unless the rpms are up or its in recirculate mode. I have recently also had another issue come up. This truck has always run at mid range temp (200) since Ive had it. No play in temp gauge at all period, unless pulling a hill towing or taxing the engine. Recently I've noticed the temp gauge creeping up to about 220 (about2/3 way towards the limit) but once it hits about 220 it drops right back down to mid range where it normally operates. It doesn't stay there at all..hits about 220 and drops right away. Just does it once in awhile. I changed the water pump a few months ago, My coolant level is good. I understand that my next 2 choices are thermostat (I know I'm an idiot for not changing that when I did the water pump), and the heater core. So I guess I'm going to start with thermostat. My question is this...where exactly is the thermostat? I hope its not in the line that goes in right above water pump..the difficult one. AND- what would cause my new issue of temp going up and down? thermostat? AND tell me the thermostat can be changed with out taking fan or water pump or anything back off.. thanks in advance for any insight..
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Old 01-14-2010, 07:17 PM
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Follow the upper hose to the motor and there it is . Under the a/c compressor area .
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Old 01-14-2010, 07:24 PM
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thank you was hoping it was that one...I'm assuming once you get house off it will be possible to change or do you have to take anything else off...looking at it...it looks damn tight.
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Old 01-14-2010, 07:25 PM
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I meant "hose" in the last post not house
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Old 01-14-2010, 08:43 PM
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I had some sort of the same trouble, turned out to be the fan clutch.
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Old 01-14-2010, 08:43 PM
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It can be done without taking anything else off but it's difficult to clean off the old gasket if you dont have a roloc or wire cup brush with a long reach. The alternator or a/c comperssor aren't hard to take off to gain access.
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