Water temp sensor
Thread Starter
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Posting Guru
Joined: Dec 2009
Posts: 2,322
Likes: 2
From: Dairy, OR
Water temp sensor
92 7.3 IDI.. My temp gauge has not been working.. today I noticed there is what looks like a water temp sending unit on the front drivers side of the engine that is unhooked. Is that it? If so what color is the wire that should be hooked to it?
Postmaster
Joined: Apr 2009
Posts: 4,086
Likes: 1
From: Malahat/Cowichan Valley
aaahhh i have the same issue, i just found that it is the one that has the pull off connector like the GP's. Not as big and looks threaded. I am almost positive that it is the one next to the IP on top of the block. The stock model looks like this. http://cgi.ebay.com/ebaymotors/ws/eB...m=390064867491
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Posting Guru
Joined: Dec 2009
Posts: 2,322
Likes: 2
From: Dairy, OR
woohoo nice pic wreckinball, that explains it! The temp light switch is the one I found unhooked, will hook it back up today and check the gauge sending unit while I am in there.
Senior User
Joined: Sep 2009
Posts: 110
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From: Cartersville Georgia
Is there some type of test that I can use to see it my temp gauge sending unit is working at all? Mine has never worked, but I'm just finally getting around to trying to fix it. Also I'm almost certain that my thermostat is stuck open also, so I've never been worried to much about it overheating. But with the recent cold snap, its been killing my MPG. Trying to fix both problems this weekend!
Post Fiend
Joined: Oct 2007
Posts: 10,501
Likes: 5
From: Faibanks Ak.
Diesels need to run around 200 to be effeciant.
You can ground the wire on he temm sensor and your guage should go to hot, if it does it is usually your sensor, if the guage doesn'tmove it is gauge or wiring related.
You can ground the wire on he temm sensor and your guage should go to hot, if it does it is usually your sensor, if the guage doesn'tmove it is gauge or wiring related.
Cargo Master
Joined: Oct 2008
Posts: 3,330
Likes: 13
From: Eaton, CO
Good luck getting one at a parts store. They couldn't find the right temp sensor with a post on top of it and kept telling me I needed the one that had a locking clip on it. So they had to look up an earlier year to find it. I installed it and the temp sensor is either reading wrong, something's wrong with my gauge or thermostat, or something's wrong with my radiator. My stepdad just bought a sensor made by the same mfg from a parts hut for his Chevy, it wouldn't run until he uninstalled it and reinstalled the original sensor. I'm not big on the sensor brands most parts stores carry. It seems like more and more parts stores are carrying junk parts and their computers are wrong. I wish I bought my sensor from the dealership.
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Postmaster
Joined: Apr 2009
Posts: 4,086
Likes: 1
From: Malahat/Cowichan Valley
I would go with aftermarket so you can see what is really going on. Normal means Jack Shi! I need to see a temp so I know when I am pulling!
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Senior User
Joined: Sep 2009
Posts: 110
Likes: 0
From: Cartersville Georgia
I appreciate the help. The gauge is good, apparently the bullet connector slipped of the end of the sensor. I'll find out if the sensor is good when I leave work this evening! After that, tackling the stuck thermostat!
Senior User
Joined: Apr 2008
Posts: 249
Likes: 0
From: above ground
so...............
what do these motors do when,
thermostat is bad?
water pump is bad?
head gasket is bad?
mine used to run at the beginning of the normal bar, now moves all over from there to the N at normal. it goes back and forth and back and forth. i need to get a mechanical gauge.
what do these motors do when,
thermostat is bad?
water pump is bad?
head gasket is bad?
mine used to run at the beginning of the normal bar, now moves all over from there to the N at normal. it goes back and forth and back and forth. i need to get a mechanical gauge.
Senior User
Joined: Sep 2009
Posts: 110
Likes: 0
From: Cartersville Georgia
so...............
what do these motors do when,
thermostat is bad?
water pump is bad?
head gasket is bad?
mine used to run at the beginning of the normal bar, now moves all over from there to the N at normal. it goes back and forth and back and forth. i need to get a mechanical gauge.
what do these motors do when,
thermostat is bad?
water pump is bad?
head gasket is bad?
mine used to run at the beginning of the normal bar, now moves all over from there to the N at normal. it goes back and forth and back and forth. i need to get a mechanical gauge.
Rather it be stuck open than stock closed though, but I was freezing my ***** off a couple weeks ago and its guzzling diesel (not that it was all that great on it before
) My local dealership getting a replacement in today!