Temp sending unit location ? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

teamharvey · 02-12-2005, 01:24 AM

On a 72 blazer, where is the temp. sending unit located ? The PO built the motor up and possibly left it off. I have heard the drivers side head as well as up near the thermostat. I have a performer intake if that helps. Sorry, but I am pretty green when it comes to electrical.

Thanks,
Bret

Robert1970C20rstbukt · 02-12-2005, 01:32 AM

I've got the one in my truck mounted in the water neck. It reads right in the middle of the gauge while driving it around town and it will read cooler when I'm driving on the highway. So I guess either the water neck or the head will work. I think they were originally mounted in the drivers side head though.

Huck · 02-12-2005, 09:31 AM

The stock location is on the head, drivers side near #2 cylinder. Your temp reading will be higher if on the intake or on the thermostat housing---the higher the location--the higher the reading---usually! It is also much more noticable when you stop as the water pump slows down and the circulation allows the hotter coolant to rise to the top of the block.

teamharvey · 02-12-2005, 12:44 PM

Thanks guys !

02-12-2005, 01:24 AM	#1
teamharvey Registered User Join Date: Jul 2004 Location: Turlock, Ca Posts: 579	Temp sending unit location ? On a 72 blazer, where is the temp. sending unit located ? The PO built the motor up and possibly left it off. I have heard the drivers side head as well as up near the thermostat. I have a performer intake if that helps. Sorry, but I am pretty green when it comes to electrical. Thanks, Bret __________________ 71 Custom 20 Deluxe..soon to be SWB 1/2 ton 1 incredible wife 2 great kids

02-12-2005, 12:44 PM	#4
teamharvey Registered User Join Date: Jul 2004 Location: Turlock, Ca Posts: 579	Thanks guys ! __________________ 71 Custom 20 Deluxe..soon to be SWB 1/2 ton 1 incredible wife 2 great kids

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02-12-2005, 01:32 AM	#2
Robert1970C20rstbukt Registered User Join Date: Jun 2004 Location: Beeville, Texas Posts: 1,943	I've got the one in my truck mounted in the water neck. It reads right in the middle of the gauge while driving it around town and it will read cooler when I'm driving on the highway. So I guess either the water neck or the head will work. I think they were originally mounted in the drivers side head though. __________________ RJD 1984 Chevrolet C30 welding truck 454/SM465 1977 GMC C15 pickup 350/TH350 1970 Chevrolet C20 pickup 350/TH400 1970 Chevrolet K20 Suburban 454/TH350 1969 GMC 8500 478M V6/5 spd winch truck

02-12-2005, 09:31 AM	#3
Huck Senior Member Join Date: Jun 2001 Location: Shelbyville, KY Posts: 3,269	The stock location is on the head, drivers side near #2 cylinder. Your temp reading will be higher if on the intake or on the thermostat housing---the higher the location--the higher the reading---usually! It is also much more noticable when you stop as the water pump slows down and the circulation allows the hotter coolant to rise to the top of the block.



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