Thermostat?
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Senior User
Joined: Oct 2003
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From: Abingdon, MD
Thermostat?
I've been driving my truck lately and noticed the temperature guage doesnt get as "hot" anymore. It used to sit right on the logo, but now it usually sits between (C) Cold and the logo. Almost as if it's not working correctly. Anyone know why it isnt going up all of the way?
Posting Guru
Joined: Nov 2003
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From: Homer, Alaska
Also you need to replace the anti-freeze. Don't use the old stuff. Before you go to all that trouble, make sure the heater is putting out heat. If it is blowing cold or cool after a few minutes of driving, it probably is the thermostat. If it is hot, the problem is the guage or sending unit.
Mountain Pass
Joined: Nov 2003
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Replace the sending unit, they've got a reputation for failing prematurely. (Mine did) They're about $10 and easy as a spark plug to install. Lots of people on this site will change the coolant, thermostat and sending unit every 2 years as a matter of routine maintenance.
Not sure what truck yours is, my 4.0L has 2 sending units screwed into the thermostat housing. The single wire unit is for the temp gauge, and the multi-wire unit with quick connect plug is for the Computer. Replace the single wire one and you're off to the races.
Ron
Not sure what truck yours is, my 4.0L has 2 sending units screwed into the thermostat housing. The single wire unit is for the temp gauge, and the multi-wire unit with quick connect plug is for the Computer. Replace the single wire one and you're off to the races.
Ron
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Senior User
Joined: Oct 2003
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From: Abingdon, MD
Okay, so i bought a new sending unit at Salvo for only 6 bucks. Now i just need to install it. I could easily get someone else to but i'd like to do it myself. Where under the hood would i need to replace this at?
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From: St. Peter
You should consider buying a haynes repair manual for your year of truck. they help out alot with stuff like this and they usually have pictures. Auto parts stores should have them, probably like 10-15 bucks
