temp gauge not working - The 1947 - Present Chevrolet & GMC Truck Message Board Network

aharper33 · 04-06-2016, 04:12 PM

I have an'86 4x4 with a 350. Since it is kinda getting nice out a few days here and there I have been doing a few cheap fixes on my truck. I was having a problem with my truck over heating and narrowed it down to the thermostat not working properly. I got a new one and installed it over the weekend. Now my temp gauge doesnt work and it seems like I have no heat. Everything worked perfectly fine before. Is there something that I messed up or is it some fluke with the gauge?

**TKCR** · 04-06-2016, 04:28 PM

There's been other threads on this subject before. So you changed out the temp sensor on the engine block, correct? From the other threads I have read up before in the past, it's because of the sensor itself. You have to make sure you get the right one to work with the original temp gauge in your dash. I'll see if I can find those threads and post the links.

aharper33 · 04-06-2016, 04:30 PM

Actually all I changed was the thermostat.

aharper33 · 04-06-2016, 04:37 PM

I had a 180 in there to begin with and it worked great. But in the Wyoming winter I was thinking if I put a 190 or 195 it would work better warming up faster and to a bit higher temp. But I think the one I put in was faulty and the temp would get up to 240 or so in like a 3 mile drive. So I put the 180 back in there this weekend and went for a drive and noticed that the gauge never got off 0 degrees and I didnt have any heat either which I had before.

**TKCR** · 04-06-2016, 04:40 PM

Quote:

Originally Posted by aharper33

Actually all I changed was the thermostat.

The temp sensor on the engine block is what sends the temp to the gauge on your dash. I had an aftermarket sensor and i went back to the original (new) sensor so my temp guage on my dash starting working again.

Its on the left side of the engine between the plugs. There should be a single green wire attached to the tip of the sensor.

aharper33 · 04-06-2016, 04:43 PM

I will have to take a look at that when I get home

**TKCR** · 04-06-2016, 04:44 PM

here's is one of those threads. You can always do a search for temp sensor or temp gauge, and you'll get multiple threads on the subject.

http://67-72chevytrucks.com/vboard/s...ht=temp+sensor

04-06-2016, 04:12 PM	#1
aharper33 Registered User Join Date: Jan 2016 Location: Laramie, WY Posts: 46	temp gauge not working I have an'86 4x4 with a 350. Since it is kinda getting nice out a few days here and there I have been doing a few cheap fixes on my truck. I was having a problem with my truck over heating and narrowed it down to the thermostat not working properly. I got a new one and installed it over the weekend. Now my temp gauge doesnt work and it seems like I have no heat. Everything worked perfectly fine before. Is there something that I messed up or is it some fluke with the gauge?

04-06-2016, 04:28 PM	#2
TKCR Senior Member Join Date: Oct 2014 Location: Ohio Posts: 6,980	Re: temp gauge not working There's been other threads on this subject before. So you changed out the temp sensor on the engine block, correct? From the other threads I have read up before in the past, it's because of the sensor itself. You have to make sure you get the right one to work with the original temp gauge in your dash. I'll see if I can find those threads and post the links.

04-06-2016, 04:30 PM	#3
aharper33 Registered User Join Date: Jan 2016 Location: Laramie, WY Posts: 46	Re: temp gauge not working Actually all I changed was the thermostat.

04-06-2016, 04:37 PM	#4
aharper33 Registered User Join Date: Jan 2016 Location: Laramie, WY Posts: 46	Re: temp gauge not working I had a 180 in there to begin with and it worked great. But in the Wyoming winter I was thinking if I put a 190 or 195 it would work better warming up faster and to a bit higher temp. But I think the one I put in was faulty and the temp would get up to 240 or so in like a 3 mile drive. So I put the 180 back in there this weekend and went for a drive and noticed that the gauge never got off 0 degrees and I didnt have any heat either which I had before.

04-06-2016, 04:43 PM	#6
aharper33 Registered User Join Date: Jan 2016 Location: Laramie, WY Posts: 46	Re: temp gauge not working I will have to take a look at that when I get home

04-06-2016, 04:44 PM	#7
TKCR Senior Member Join Date: Oct 2014 Location: Ohio Posts: 6,980	Re: temp gauge not working here's is one of those threads. You can always do a search for temp sensor or temp gauge, and you'll get multiple threads on the subject. http://67-72chevytrucks.com/vboard/s...ht=temp+sensor



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