5.3 Thermostat Housing with Temp Ports - The 1947 - Present Chevrolet & GMC Truck Message Board Network

dme922 · 11-02-2016, 08:46 PM

Im running a 5.3 out of a 04 silverado and i am trying to find a thermostat housing with temp ports fo my fan sender. If anyone knows where to get one or part # it would be much appreciated

**mongocanfly** · 11-02-2016, 09:14 PM

Not sure about the housing your looking (I've not seen one) for but you could use the sending unit hole that would be in the passenger side head ...opposite of the one in the drivers side head...its gonna be metric though..you may have to drill and tap it out..

dme922 · 11-02-2016, 09:31 PM

I used that port for my dakota digital sender but it it ok to just drill and tap the factory thermostat housing?

**mongocanfly** · 11-02-2016, 10:21 PM

Your ecm will need a temp reading to...on mine the way I have it set up is..ecm reads from drivers side head sending unit..my temp gauge reads from passenger side head..the ecm controls my fans..do you have this running or are you in the install stage?

dme922 · 11-02-2016, 10:26 PM

I have it running. I am using a painless wiring harness and it has two wires marked fan 1 and fan two but thee fans will not come on with them ran to these wires

**LEEVON** · 11-02-2016, 10:32 PM

Top of the water pump is easier...I have one there and in the head. I have never seen an LS t-stat housing with temp sending units or bungs/ports.

**mongocanfly** · 11-03-2016, 01:07 AM

You may have a problem with your ecm program..some ecms are only setup to run one fan...mine was that way and it wouldn't work either..I had to get it reprogrammed to run 2 fans and now its fine..I used a psi harness and fan 1 and fan 2 wires go to a set of psi relays..each relay goes to a fan..how did you have yours setup? those water pump housings are very thin...I ran my steam port that way..the original pump was thicker..I had to replace my leaking pump and the new one was only about half as thick as the factory one was.

dme922 · 11-03-2016, 01:17 AM

I have two relays for my fans and i was running the sender wire from each to the fan 1 and fan 2 or the harness

ls1nova71 · 11-03-2016, 11:24 AM

How did you have them wired? The PCM sends a ground signal to the relay to turn them on, was that how you had it?

dme922 · 11-03-2016, 09:07 PM

I had the fan relays gray wire ran to fan 1 and fan 2. The guy that programmed my computer said it was set for the fans to come on at 205 and off at 190.

11-02-2016, 08:46 PM	#1
dme922 Registered User Join Date: Mar 2012 Location: Gallipolis, Ohio Posts: 296	5.3 Thermostat Housing with Temp Ports Im running a 5.3 out of a 04 silverado and i am trying to find a thermostat housing with temp ports fo my fan sender. If anyone knows where to get one or part # it would be much appreciated

11-02-2016, 09:14 PM	#2
mongocanfly Post Whore Join Date: May 2015 Location: Alabama Posts: 14,671	Re: 5.3 Thermostat Housing with Temp Ports Not sure about the housing your looking (I've not seen one) for but you could use the sending unit hole that would be in the passenger side head ...opposite of the one in the drivers side head...its gonna be metric though..you may have to drill and tap it out..

11-02-2016, 09:31 PM	#3
dme922 Registered User Join Date: Mar 2012 Location: Gallipolis, Ohio Posts: 296	Re: 5.3 Thermostat Housing with Temp Ports I used that port for my dakota digital sender but it it ok to just drill and tap the factory thermostat housing?

11-02-2016, 10:21 PM	#4
mongocanfly Post Whore Join Date: May 2015 Location: Alabama Posts: 14,671	Re: 5.3 Thermostat Housing with Temp Ports Your ecm will need a temp reading to...on mine the way I have it set up is..ecm reads from drivers side head sending unit..my temp gauge reads from passenger side head..the ecm controls my fans..do you have this running or are you in the install stage?

11-02-2016, 10:26 PM	#5
dme922 Registered User Join Date: Mar 2012 Location: Gallipolis, Ohio Posts: 296	Re: 5.3 Thermostat Housing with Temp Ports I have it running. I am using a painless wiring harness and it has two wires marked fan 1 and fan two but thee fans will not come on with them ran to these wires

11-02-2016, 10:32 PM	#6
LEEVON Moderator Join Date: Jul 2006 Location: Ozark, MO Posts: 4,888	Re: 5.3 Thermostat Housing with Temp Ports Top of the water pump is easier...I have one there and in the head. I have never seen an LS t-stat housing with temp sending units or bungs/ports. __________________ '20 Silverado Trail Boss ~ '17 Tahoe ~ '79 K15 Sierra Grande ~ '76 Blazer 2wd ~ '71 Cheyenne swb ~ '55 Pontiac Safari ~'50 3100 bagged ~ '80 Wife ~ Late model kids

11-03-2016, 01:07 AM	#7
mongocanfly Post Whore Join Date: May 2015 Location: Alabama Posts: 14,671	Re: 5.3 Thermostat Housing with Temp Ports You may have a problem with your ecm program..some ecms are only setup to run one fan...mine was that way and it wouldn't work either..I had to get it reprogrammed to run 2 fans and now its fine..I used a psi harness and fan 1 and fan 2 wires go to a set of psi relays..each relay goes to a fan..how did you have yours setup? those water pump housings are very thin...I ran my steam port that way..the original pump was thicker..I had to replace my leaking pump and the new one was only about half as thick as the factory one was.

11-03-2016, 01:17 AM	#8
dme922 Registered User Join Date: Mar 2012 Location: Gallipolis, Ohio Posts: 296	Re: 5.3 Thermostat Housing with Temp Ports I have two relays for my fans and i was running the sender wire from each to the fan 1 and fan 2 or the harness

11-03-2016, 11:24 AM	#9
ls1nova71 Registered User Join Date: Dec 2009 Location: Independence Mo Posts: 4,119	Re: 5.3 Thermostat Housing with Temp Ports How did you have them wired? The PCM sends a ground signal to the relay to turn them on, was that how you had it? __________________ My '72 short bed build. http://www.ls1tech.com/forums/conver...6-0-4l80e.html 5.3 swap into my RUSTY '71 C10 http://ls1tech.com/forums/conversion...71-c-10-a.html

11-03-2016, 09:07 PM	#10
dme922 Registered User Join Date: Mar 2012 Location: Gallipolis, Ohio Posts: 296	Re: 5.3 Thermostat Housing with Temp Ports I had the fan relays gray wire ran to fan 1 and fan 2. The guy that programmed my computer said it was set for the fans to come on at 205 and off at 190.

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