Temp sender location - The 1947 - Present Chevrolet & GMC Truck Message Board Network

lovnthe70 · 06-19-2010, 11:26 AM

Hey guys, where do you perfer to have your temp sender?? In your block or your thermostat housing?? I currently have mine in my block and a mechanic i was talking to said i need to move it to my t-stat housing?. Thats where i used to have it, but it seemed to me i would want to know the temp inside my block. Also how much of a temp difference is there between the 2??

and sorry if the poll dosent work, ive never done one and thought i would try!!

Shyguy · 06-19-2010, 11:37 AM

I think it works, I just voted and it showed up in the poll.

I figure if GM thought it should be in the block that is where I put it. I know some newer cars and trucks also had it in the water neck, but usually that was part of the smog equipment.

I guess it would not hurt to run one in each place if a person wants to know what the temperature is in both places.

Danny

**Classic Heartbeat** · 06-19-2010, 11:56 AM

My thoughts are in the block. Like you I tend to wonder about the effectiveness of it in the thermostat housing. The thermostat remains closed to the water in the engine untill it heats up enough to flush the hot water out of the engine. Then the water pump replace the hot water with the cooler water from the radiator via the bottom nipple of the radiator. What closes the thermostat is after the engine fills with the cooled water it starts running back into the top of the radiator, cooling the thermostat, witch then closes it. So it makes sence that the teprature of the water in the thermostat housing doesn't reflect the temprature of the water in the block. WES

A69C10 · 06-19-2010, 11:57 AM

temp diff has been around 10 to 20 degress off as engine is hotter on sbc 355

GASoline71 · 06-19-2010, 12:45 PM

Mine is in the drivers side cylinder head. Stock location.

Gary

lovnthe70 · 06-19-2010, 01:21 PM

so since i have my sender in my block.....and it is approx 10-20 degs hotter there, is a temperature of 210-220 alright? or should i still be around 190-200?

Sinister · 06-19-2010, 01:29 PM

210-220 is a little too warm. Mine runs around 190-195.

raycow · 06-19-2010, 03:26 PM

Intake would be my first choice, since that was the normal location for a long time. Second choice would be the head. I have never seen one in the block.

Ray

Longhorn Man · 06-20-2010, 12:26 AM

the head is the stock location on all V 8 gas motors in these trucks.
I would rather know if the engine was overheating, verses the temp of the coolant on the cool side of a stuck t-stat... but that's just me.

Jacfourteen · 06-20-2010, 03:49 AM

I think the head is a more accurate measure of the internal engine temp, so that is where mine is.

**LockDoc** · 06-20-2010, 11:46 AM

-
I can't verify this as correct but a mechanic friend told me once that the best place is as close to cylinder #8 as possible as this is the warmest area in the engine. Just throwin' this out for discussion.

LockDoc

OJ1988 · 06-20-2010, 12:11 PM

Drivers side head for me. Temp switch for rad fan is next to the thermostat on my truck.
Most gm products I have delt with have had it here, or moreso in the same port on the pass head which then, as previously suggested , right next to the #8 cylinder.
That would make sense as it should be hottest. Also, makes it convenient for wiring as it can join up with starter wires, heater control, coil, and any other accessory wires, you know gm considered that for easy assembly.

GASoline71 · 06-20-2010, 12:46 PM

I have had a '67 Chevy C10, a '71 ElCamino SS, a '79 GMC K25, and now my '72 GMC C1500. All have had the sending unit in the forward hole in the cylinder head between #1 and #3 cylinders in SBC's. Factory wire harnesses went there too...

Even when I ran Autometer gauges in my Elky, I ran the sending unit in the same spot. Just to keep it fairly "original" looking.

Gary

cdowns · 06-20-2010, 01:47 PM

i think the head is best// block i believe can suffer more heat with no damage with the heads suseptible to the damage easier

bigguy69 · 06-20-2010, 05:11 PM

mine is in the head. between the #6 and#8 cylinders. i prefer the head also

View Poll Results: where do you put your temperature sender probe.
probe in T-stat housing	3	10.34%
probe in block	26	89.66%
Voters: 29. You may not vote on this poll

06-19-2010, 11:37 AM	#2
Shyguy Junior Member Join Date: Dec 2006 Location: Southeast Missouri Posts: 2,436	Re: Temp sender location I think it works, I just voted and it showed up in the poll. I figure if GM thought it should be in the block that is where I put it. I know some newer cars and trucks also had it in the water neck, but usually that was part of the smog equipment. I guess it would not hurt to run one in each place if a person wants to know what the temperature is in both places. Danny __________________ '67 Chevy C-20 short stepper - build complete, 454/SM-465. '75 C-30 Single Cab DRW-350 small block/NP-435. '77 GMC-6500 Dump Truck, 427 Tall Deck. '92 GMC K-3500 Duallie, 454/4L80E.

06-19-2010, 11:57 AM	#4
A69C10 Registered User Join Date: Dec 2009 Location: McDonough,GA Posts: 123	Re: Temp sender location temp diff has been around 10 to 20 degress off as engine is hotter on sbc 355

06-19-2010, 01:29 PM	#7
Sinister Between Trucks... Join Date: Mar 2002 Location: Los Angeles, CA. Posts: 3,830	Re: Temp sender location 210-220 is a little too warm. Mine runs around 190-195. __________________ Beat it to fit, Paint it to match...

06-20-2010, 12:26 AM	#9
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	Re: Temp sender location the head is the stock location on all V 8 gas motors in these trucks. I would rather know if the engine was overheating, verses the temp of the coolant on the cool side of a stuck t-stat... but that's just me.

06-19-2010, 11:26 AM	#1
lovnthe70 Registered User Join Date: Nov 2008 Location: Tempe, AZ Posts: 181	Temp sender location Hey guys, where do you perfer to have your temp sender?? In your block or your thermostat housing?? I currently have mine in my block and a mechanic i was talking to said i need to move it to my t-stat housing?. Thats where i used to have it, but it seemed to me i would want to know the temp inside my block. Also how much of a temp difference is there between the 2?? and sorry if the poll dosent work, ive never done one and thought i would try!! __________________ 1970 GMC- 454 DONT GIVE ME NO JIBBA JABBA!!!

06-19-2010, 11:56 AM	#3
Classic Heartbeat Project Junkie! Fishing Poor!! Join Date: Dec 1999 Location: Olympia,Wa. 98512 Posts: 10,766	Re: Temp sender location My thoughts are in the block. Like you I tend to wonder about the effectiveness of it in the thermostat housing. The thermostat remains closed to the water in the engine untill it heats up enough to flush the hot water out of the engine. Then the water pump replace the hot water with the cooler water from the radiator via the bottom nipple of the radiator. What closes the thermostat is after the engine fills with the cooled water it starts running back into the top of the radiator, cooling the thermostat, witch then closes it. So it makes sence that the teprature of the water in the thermostat housing doesn't reflect the temprature of the water in the block. WES __________________ On-line catolog Classic Heartbeat Pickup Parts WEHEPP@comcast.net Call us Toll Free (888) 338-2502 Like Us on Facebook No appointment necessary. 72 BB Chevy Custom Deluxe / Custom Camper 67 I-6 (Soon to be 5.7 LS1) Panel 68 BB Chevy Short Bed 72 6.0 LQ9 Short Bed Chevy 4X4 Olympia's fastest growing truck parts supplier. Olympia's home for Wayward Chevys

06-19-2010, 01:21 PM	#6
lovnthe70 Registered User Join Date: Nov 2008 Location: Tempe, AZ Posts: 181	Re: Temp sender location so since i have my sender in my block.....and it is approx 10-20 degs hotter there, is a temperature of 210-220 alright? or should i still be around 190-200? __________________ 1970 GMC- 454 DONT GIVE ME NO JIBBA JABBA!!!

06-19-2010, 03:26 PM	#8
raycow Registered User Join Date: Mar 2003 Location: San Francisco, CA USA Posts: 2,454	Re: Temp sender location Intake would be my first choice, since that was the normal location for a long time. Second choice would be the head. I have never seen one in the block. Ray

06-20-2010, 03:49 AM	#10
Jacfourteen Big Red - Now its a SWB! Join Date: Jun 2009 Location: Oroville, Ca Posts: 1,624	Re: Temp sender location I think the head is a more accurate measure of the internal engine temp, so that is where mine is. __________________ 68 3/4 ton (Project)-350 Small Block, .030 over, 10:1 comp, 3998993 heads, C3BX edelbrock intake, comp cams XE268, Holley 670 SA, long tube headers, dual flow 40's, E-fan, Alum rad, currently under the knife getting shortened and bagged build thread 41 3/4 ton (wife's)-flatbed, fully restored to original 01 Tahoe LT 4WD (my daily driver)-Magnaflow Muffler, Rollin on 22's 02 Ford Mustang Convertable (Wife's Car)-Flowmaster 50, Clear corners, Intake, sittin on 18's

06-20-2010, 11:46 AM	#11
LockDoc The Older Generation Join Date: Aug 2006 Location: Montezuma, Iowa Posts: 25,818	Re: Temp sender location - I can't verify this as correct but a mechanic friend told me once that the best place is as close to cylinder #8 as possible as this is the warmest area in the engine. Just throwin' this out for discussion. LockDoc __________________ Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 -

06-20-2010, 12:11 PM	#12
OJ1988 Just a car guy Join Date: Feb 2006 Location: New Washington, IN Posts: 991	Re: Temp sender location Drivers side head for me. Temp switch for rad fan is next to the thermostat on my truck. Most gm products I have delt with have had it here, or moreso in the same port on the pass head which then, as previously suggested , right next to the #8 cylinder. That would make sense as it should be hottest. Also, makes it convenient for wiring as it can join up with starter wires, heater control, coil, and any other accessory wires, you know gm considered that for easy assembly. __________________ 1955 belair Blown Pro Street cruiser 1971 Camaro Pro Touring 1973 Vega Drag Car 1970 C20 tow rig

06-20-2010, 01:47 PM	#14
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	Re: Temp sender location i think the head is best// block i believe can suffer more heat with no damage with the heads suseptible to the damage easier __________________ 71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY

06-20-2010, 05:11 PM	#15
bigguy69 dazed and confused Join Date: Jul 2008 Location: marion nc Posts: 1,649	Re: Temp sender location mine is in the head. between the #6 and#8 cylinders. i prefer the head also __________________ members met: redbaron69, billsbowtie,nc67



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