Where on engine is thermostast sensor? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

SEVENTY1 · 03-26-2007, 10:07 AM

Hi everyone, newbie here. Does anyone know where on the engine area I can find the thermostat sensor?. I have a 71 with the 350 V8.

Any help is greatly apreciated.

Thanks

bandit1 · 03-26-2007, 10:12 AM

if you mean the temperature sender, its at the front of the block on the driver side near the number 2 spark plug

stingray72 · 03-26-2007, 10:13 AM

Quote:

Originally Posted by SEVENTY1

Hi everyone, newbie here. Does anyone know where on the engine area I can find the thermostat sensor?. I have a 71 with the 350 V8.

Any help is greatly apreciated.

Thanks

Mine's on the drivers side of the truck down on the block in between the first 2 spark plugs counting from the front of the truck

SEVENTY1 · 03-26-2007, 10:26 AM

Cool thanks.. My drive belt broke off last week, which caused my truck to overheat for a minute or two. After replacing the belt I drove my truck a few miles to make sure everything was fine, and I noticed that my thermo gauge was not working anymore. It was working fine before the belt broke off, so first thing that comes to mind is my sensor went bad or something. Has anyone ever had this problem?

Thanks

68Mike · 03-26-2007, 02:30 PM

If the belt broke, maybe it hit the sensor and knocked the wiring off. Could be something [I]really[I]simple...good luck

SEVENTY1 · 03-26-2007, 02:40 PM

Quote:

Originally Posted by 68Mike

If the belt broke, maybe it hit the sensor and knocked the wiring off. Could be something [I]really[I]simple...good luck

That's what I'm thinking happended, I found one wire around the power steering reservoir, that looks like it's coming from the firewall, but just can't find where it connects to.

blukangoo · 03-26-2007, 03:04 PM

Pictures say more than words.

I circled the temperature sender.

SEVENTY1 · 03-26-2007, 03:18 PM

Quote:

Originally Posted by blukangoo

Pictures say more than words.

I circled the temperature sender.

Thanks, Blukangoo, I'll check it out as soon as I get home this afternoon.

BowTieOgre · 03-26-2007, 03:20 PM

The temp sensor should be sticking out of the drivers side of your engine block and will look like this...

oops...too little too late...took me a few minutes to find a pic on the net. GL

Ole Blue 68 · 03-26-2007, 03:20 PM

Quote:

Originally Posted by SEVENTY1

That's what I'm thinking happended, I found one wire around the power steering reservoir, that looks like it's coming from the firewall, but just can't find where it connects to.

That sounds like it. I had the same problem once. My temp gauge went crazy and I almost had a heart attack till I realized that the wire had come undone and was touching the header.

Tx Firefighter · 03-26-2007, 04:01 PM

The wire should be green.

By the way, it's screwed into the head, not the block.

blukangoo · 03-26-2007, 04:08 PM

Quote:

Originally Posted by BowTieOgre

oops...too little too late...took me a few minutes to find a pic on the net. GL

I have about 1500 pictures of my own right now and it grows every day.
When I get to putting everything back together, my Laptop is going to be my best friend and helper.

BowTieOgre · 03-26-2007, 04:24 PM

Quote:

Originally Posted by Tx Firefighter

The wire should be green.

By the way, it's screwed into the head, not the block.

Too right TX, im a little ill right now and the brain is a bit coudy.

SEVENTY1 · 03-26-2007, 04:30 PM

Wow, thanks for all the help guys. I'll check it out tonight.

rophle1 · 03-26-2007, 04:31 PM

Sorry to threadjack, (hopefully since the original question was answered I won't be beaten), but I just did a rebuild and the guy who put the heads on put them on "backwards" he put the head with the temp sensor on the passenger side. There's a threaded whole on the drivers side for the sender, but we couldn't get the plug out (kept breaking sockets trying) so I decided to just leave it on the passenger side. Will this give me any problems other than looking like crap with the line running behind the engine?

72 68 andmore · 03-26-2007, 04:36 PM

Quote:

Originally Posted by rophle1

Sorry to threadjack, (hopefully since the original question was answered I won't be beaten), but I just did a rebuild and the guy who put the heads on put them on "backwards" he put the head with the temp sensor on the passenger side. There's a threaded whole on the drivers side for the sender, but we couldn't get the plug out (kept breaking sockets trying) so I decided to just leave it on the passenger side. Will this give me any problems other than looking like crap with the line running behind the engine?

I hope not cuz that is the same issue I had, you can put either head on either side....I goofed and left the empty hole for the send at the back hole on the passenger side.........seems to work okay. I remember my 79 chevy van was like that so I guess I should be okay

Longhorn Man · 03-26-2007, 04:46 PM

It'll be fine

SEVENTY1 · 03-27-2007, 09:03 AM

I found the sensor last night, and there is nothing hooked up to it. The only green wire that I found has an flat end connection that looks like it wont fit. It started raining last night so I did'nt have time to mess with it. Does anyone know what the green wire end connection looks like?

Tx Firefighter · 03-27-2007, 09:54 AM

That's the wire. It doesn't plug straight on, it slides on from the side. It's a real funny connector. Notice the temp sender has a tit on it that looks like the head of anail rather than a spade like you might expect.

SEVENTY1 · 03-27-2007, 10:40 AM

I'll try that during my lunch break Thanks.

blukangoo · 03-27-2007, 10:45 AM

just went through my couple of pics again and found this one.
Not too good because I had to zoom in.
Just like Tx said, it slides on to the side of the tip.

SEVENTY1 · 03-27-2007, 11:07 AM

Thanks for all the help and pics guys

. I tried it and now my gauge is working.

SEVENTY1

dwaite72lnghrn · 03-27-2007, 09:02 PM

rophle1, You could always buy another sender and and put in the correct location. That way your wiring harness would still match up.
I have a BBC and have the OEM in the passenger side like factory and an aftermarket in the driverside head.

stsalvage · 03-28-2007, 01:12 AM

All i say is go buy the edalbrock intake and have it on the Intake the one on the side of the engine is nice but GM dose not like them there they like them where the inlet is on the intake cus the wire dose not get as hot or it dose not get full of oil or greese just look its a better set up and better off getting the engine wire harness cost you 139.00 but its well worth the truble just look how nice it stays out of the way and look where the ram hon it its just too close and to much heat

edmonton72 · 03-28-2007, 01:32 AM

When I bought my truck the original engine was gone and replac with an later engine.(It had a long nose water pump and the dip stick was on the right side). Well I believe the temp. sender was on the intake manifold close to the carb, I dont think I had one on the side of the head. I put an edelbrock intake on the motor so I'm going to do what stsalvage did and put it on the intake.

03-26-2007, 10:07 AM	#1
SEVENTY1 Registered User Join Date: Mar 2007 Location: Houston TX Posts: 50	Where on engine is thermostast sensor? Hi everyone, newbie here. Does anyone know where on the engine area I can find the thermostat sensor?. I have a 71 with the 350 V8. Any help is greatly apreciated. Thanks

03-26-2007, 10:12 AM	#2
bandit1 Registered User Join Date: Jan 2007 Location: Victoria B.C Posts: 35	Re: Where on engine is thermostast sensor? if you mean the temperature sender, its at the front of the block on the driver side near the number 2 spark plug __________________ 1969 GMC 910 1970 GMC 1500 custom 1972 yamaha 175 "Money is just like trucks you can never have enough" Last edited by bandit1; 03-26-2007 at 10:12 AM.

03-26-2007, 10:26 AM	#4
SEVENTY1 Registered User Join Date: Mar 2007 Location: Houston TX Posts: 50	Re: Where on engine is thermostast sensor? Cool thanks.. My drive belt broke off last week, which caused my truck to overheat for a minute or two. After replacing the belt I drove my truck a few miles to make sure everything was fine, and I noticed that my thermo gauge was not working anymore. It was working fine before the belt broke off, so first thing that comes to mind is my sensor went bad or something. Has anyone ever had this problem? Thanks

03-26-2007, 02:30 PM	#5
68Mike Registered User Join Date: Jan 2007 Location: Salinas,Ca 93906 Posts: 502	Re: Where on engine is thermostast sensor? If the belt broke, maybe it hit the sensor and knocked the wiring off. Could be something [I]really[I]simple...good luck __________________ Mike Currents: '74 Cheyenne Super C30 Camper Special 3+3 aka "Sucia30" Past: '79 C10 BIG 10 (Sold) 69 CST LWB - Always a "Work in progress" true work truck (stolen) 05 GSXR 750 it has a pretty paint job _wrecked 72 SWB full frame restoration -sold! 71 CST K5 Blazer 4x4 (soon to be 2wd)-project - sold! C10 Club 2012 Brothers Show Video http://youtu.be/pUeV2vP7Wpo

03-26-2007, 03:04 PM	#7
blukangoo Neighborhood Pickle Slinger Join Date: Jan 2007 Location: Cadolzburg, Bavaria, Germany Posts: 2,224	Re: Where on engine is thermostast sensor? Pictures say more than words. I circled the temperature sender. Attached Images __________________ -------------------------------------------------- My C10 Diary Our cars: 1966 Chevrolet Chevelle 396 - TH350 1968 Chevrolet C10/CST 327 TH400/375 1969 Corvette Stingray 350 - Muncie Manual Trans 1969 Chevrolet ElCamino 350 - TH400 1970 Cutlass Supreme Convertible - 350 Rocket - TH350 1973 Camaro LT - New Engine Done - TH350 1973 Corvette Convertible 454 - TH400

03-26-2007, 03:20 PM	#9
BowTieOgre Registered User Join Date: Mar 2006 Location: Pensacola, FL Posts: 1,461	Re: Where on engine is thermostast sensor? The temp sensor should be sticking out of the drivers side of your engine block and will look like this... oops...too little too late...took me a few minutes to find a pic on the net. GL Attached Images __________________ 1986 C10 - LWB, 305/700r4, posi, vortec heads Last edited by BowTieOgre; 03-26-2007 at 03:21 PM.

03-26-2007, 04:01 PM	#11
Tx Firefighter Watch out for your cornhole ! Join Date: Jun 2003 Location: Azle, Texas Posts: 14,162	Re: Where on engine is thermostast sensor? The wire should be green. By the way, it's screwed into the head, not the block. __________________ I'm on the Instagram- @Gearhead_Kevin

03-26-2007, 04:30 PM	#14
SEVENTY1 Registered User Join Date: Mar 2007 Location: Houston TX Posts: 50	Re: Where on engine is thermostast sensor? Wow, thanks for all the help guys. I'll check it out tonight.

03-26-2007, 04:31 PM	#15
rophle1 Registered User Join Date: Jan 2007 Location: Athens, GA Posts: 112	Re: Where on engine is thermostast sensor? Sorry to threadjack, (hopefully since the original question was answered I won't be beaten), but I just did a rebuild and the guy who put the heads on put them on "backwards" he put the head with the temp sensor on the passenger side. There's a threaded whole on the drivers side for the sender, but we couldn't get the plug out (kept breaking sockets trying) so I decided to just leave it on the passenger side. Will this give me any problems other than looking like crap with the line running behind the engine? __________________ 1968 C10 Stepside 396 bored .030 TH400

03-26-2007, 04:46 PM	#17
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Re: Where on engine is thermostast sensor? It'll be fine

03-27-2007, 09:03 AM	#18
SEVENTY1 Registered User Join Date: Mar 2007 Location: Houston TX Posts: 50	Re: Where on engine is thermostast sensor? I found the sensor last night, and there is nothing hooked up to it. The only green wire that I found has an flat end connection that looks like it wont fit. It started raining last night so I did'nt have time to mess with it. Does anyone know what the green wire end connection looks like?

03-27-2007, 09:54 AM	#19
Tx Firefighter Watch out for your cornhole ! Join Date: Jun 2003 Location: Azle, Texas Posts: 14,162	Re: Where on engine is thermostast sensor? That's the wire. It doesn't plug straight on, it slides on from the side. It's a real funny connector. Notice the temp sender has a tit on it that looks like the head of anail rather than a spade like you might expect. __________________ I'm on the Instagram- @Gearhead_Kevin

03-27-2007, 10:40 AM	#20
SEVENTY1 Registered User Join Date: Mar 2007 Location: Houston TX Posts: 50	Re: Where on engine is thermostast sensor? I'll try that during my lunch break Thanks.

03-27-2007, 10:45 AM	#21
blukangoo Neighborhood Pickle Slinger Join Date: Jan 2007 Location: Cadolzburg, Bavaria, Germany Posts: 2,224	Re: Where on engine is thermostast sensor? just went through my couple of pics again and found this one. Not too good because I had to zoom in. Just like Tx said, it slides on to the side of the tip. Attached Images __________________ -------------------------------------------------- My C10 Diary Our cars: 1966 Chevrolet Chevelle 396 - TH350 1968 Chevrolet C10/CST 327 TH400/375 1969 Corvette Stingray 350 - Muncie Manual Trans 1969 Chevrolet ElCamino 350 - TH400 1970 Cutlass Supreme Convertible - 350 Rocket - TH350 1973 Camaro LT - New Engine Done - TH350 1973 Corvette Convertible 454 - TH400

03-27-2007, 11:07 AM	#22
SEVENTY1 Registered User Join Date: Mar 2007 Location: Houston TX Posts: 50	Re: Where on engine is thermostast sensor? Thanks for all the help and pics guys . I tried it and now my gauge is working. SEVENTY1



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03-27-2007, 09:02 PM	#23
dwaite72lnghrn Registered User Join Date: Jun 2002 Location: central pa Posts: 1,525	Re: Where on engine is thermostast sensor? rophle1, You could always buy another sender and and put in the correct location. That way your wiring harness would still match up. I have a BBC and have the OEM in the passenger side like factory and an aftermarket in the driverside head. __________________ 72 longhorn c30 502BB/th400/fact air/4.11rear/ custom camper 72 bug(the better half's) under reconstruction 2009 HHR aqua blue 71 GMC k20 350/sm465 2009 Chevy hd3500 6.6 Victory Red crew cab dually Dave & Jeanne

03-28-2007, 01:12 AM	#24
stsalvage Scrapper 1 Join Date: Jan 2007 Location: Riverside Calif Posts: 1,649	Re: Where on engine is thermostast sensor? All i say is go buy the edalbrock intake and have it on the Intake the one on the side of the engine is nice but GM dose not like them there they like them where the inlet is on the intake cus the wire dose not get as hot or it dose not get full of oil or greese just look its a better set up and better off getting the engine wire harness cost you 139.00 but its well worth the truble just look how nice it stays out of the way and look where the ram hon it its just too close and to much heat Attached Images

03-28-2007, 01:32 AM	#25
edmonton72 Nothings as cool as my 72 Join Date: May 2005 Location: Edmonton, AB, Kanuckastan Posts: 181	Re: Where on engine is thermostast sensor? When I bought my truck the original engine was gone and replac with an later engine.(It had a long nose water pump and the dip stick was on the right side). Well I believe the temp. sender was on the intake manifold close to the carb, I dont think I had one on the side of the head. I put an edelbrock intake on the motor so I'm going to do what stsalvage did and put it on the intake. __________________ 1972 C10 Longbox In the middle of body off restoration Rebuilt 355, turbo 400, 3.42 12-bolt Rolling chassis finally done and cab mounted. Now onto sanding, bondo and more sanding.

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