Water pump outlet to heather - The 1947 - Present Chevrolet & GMC Truck Message Board Network

mlevario99 · 09-09-2013, 06:05 PM

On the water pump for a 5.3 vortec, which of the two is the outlet for the heather, how is the water moving??

Thanks

**truckdude239** · 09-09-2013, 09:56 PM

botgh of the 2 outlets are for the heater core i had 2 different size hoses on my heater core so they would only fit one way

mlevario99 · 09-09-2013, 11:37 PM

Thanks truckdude, but one has to be the supply and the other the return, this engine is in a 66 truck with the 5.3 and a vintage air conditioning
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**truckdude239** · 09-10-2013, 12:26 AM

Okay I put mine into my 71 so one port on my heater core was larger and matched the port on the pump and same for the other one I haven't run it yet
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Robznob11 · 09-10-2013, 02:49 PM

Quote:

Originally Posted by mlevario99

Thanks truckdude, but one has to be the supply and the other the return, this engine is in a 66 truck with the 5.3 and a vintage air conditioning
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Some one may correct me if im wrong but the smaller 5/8 line is on the back side of the t stat wich tells me it is the pressure side ( also the fact that its smaller usually indicates higher press) the 3/4 is on the front side of t stat wich because of size and location tells me its a return. I also think this because you would have no flow to heater core till the t stat opened if it were the other way around. But again this is just a guess on my part lol
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Special-Ed · 09-10-2013, 02:56 PM

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Sorry but my engine compartment is dirty from Georgia clay and Florida sand.

Obviously one is feed. One is return.

big one = return
little one = feed
2005 suburban z71 with 5.3
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Robznob11 · 09-10-2013, 03:02 PM

Quote:

Originally Posted by Special-Ed

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Sorry but my engine compartment is dirty from Georgia clay and Florida sand.

Obviously one is feed. One is return.
2005 suburban z71 with 5.3
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Now that im looking at you pic im thinking they both may be on the back side of t stat but i still think the 5/8 is feed. Ill see if i cant dig up the lsx water flow diagram on the net caus i used it to figure out how to plum my overflow bottle into the heater lines, this is why i keep thinking the 5/8 is feed caus it seems like that how i remember it. Im sure a guru will chime in soon
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Robznob11 · 09-10-2013, 03:11 PM

Of chorse my phone wont let me post the image but if you google ls engine flow (images) the second one is a diagram and the back or smaller port is feed.
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mlevario99 · 09-10-2013, 03:18 PM

Thank you all
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Special-Ed · 09-10-2013, 03:23 PM

im not sure... i have a replacement water pump and i think my casting is bad. i have little to no heat in the truck.... not a big issue when im in florida... but i froze my azz off when i went to chicago for the holidays to hang out with my kids... its pissing me off as well... i eat about 1/2 gallon every 6 months of anti freeze... i find no leaks,(die black light) holds pressure, no exhaust fumes bubbling in coolant, no signs on plugs... but every once in a while i smell steaming coolant... thinking it may be a dodgy pressure cap.

or it could be seeping into the intake somehow and leaning out the fuel mixture but still being burned... i dont know enough about my engine to know off the top of my head every coolant port inside the motor and where they may leak.

i was the guy at the factory that dealt with quad 4's and the 3.4 twin dual ohd motors... and other assorted items for PMD...

the return seems like it needs to be ported to the other side of the tstat for flow to actually happen...

Robznob11 · 09-10-2013, 09:44 PM

http://i17.photobucket.com/albums/b8...oolingflow.jpg

Special-Ed · 09-10-2013, 09:55 PM

Quote:

Originally Posted by Robznob11

http://i17.photobucket.com/albums/b8...oolingflow.jpg

that picture is a wee bit off...

the return from the heater core goes directly back to the tstat housing/water pump...

it does not go back to the over flow pressure tank...

storm9c1 · 09-11-2013, 01:06 PM

Quote:

Originally Posted by Special-Ed

that picture is a wee bit off...

the return from the heater core goes directly back to the tstat housing/water pump...

it does not go back to the over flow pressure tank...

Might be interpretive, but perhaps that diagram just indicats a tee in the heater line where the pressure tank connects. I don't interpret this as meaning the heater hose goes straight to the tank.

Robznob11 · 09-11-2013, 05:25 PM

Quote:

Originally Posted by storm9c1

Might be interpretive, but perhaps that diagram just indicats a tee in the heater line where the pressure tank connects. I don't interpret this as meaning the heater hose goes straight to the tank.

Due to the fact the water pump in the diagram exits the wrong side i would say you are correct. But just to squash any misconseptions. I currently have no heater core in the hot rod. I did not want a short loop so i did run a tee right at the overflow and my feed runs up to it and back down. It works fine does not suck the tank dry or pump it full stays the same level. I originally had the tank plumed into the lower rad hose and for what ever reason was getting air pockets and over heating . The new pluming stays about 199* just ideling.
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ls1nova71 · 09-11-2013, 10:20 PM

The heater shut off goes in the small hose, the rear fitting on the engine, if that's what you're asking.

mlevario99 · 09-12-2013, 08:26 AM

Yes, that is what I was looking for, i did a search like Robznob11 suggested and found a diagram.

Thanks
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cdowns · 09-12-2013, 08:40 AM

i have a nurse called heather she is hot but i've never seen her outlets

mlevario99 · 09-12-2013, 10:46 AM

Here is the picture I found

Andy4639 · 09-20-2013, 12:50 PM

Are u guys all using the pressure tank (surge tank) in the swaps on 67-72 trucks that is posted above.?

mlevario99 · 09-20-2013, 01:09 PM

I'm not using it
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BR3W CITY · 09-20-2013, 01:50 PM

That is designed for sealed radiators that use a remote surge tank (kinda like using the ps pumps that have a remote resevoir). If your radiator has a cap with a pressure rating, then your don't need that. The idea is that it keeps some extra fluid and give the fluid a place to go under. It also helps keep a full radiator since it hold extra fluid that can drain into the rad if it gets low.

Most of us have a regular capped radiator. You fill the rad, and run an overflow so it has a safe place to dump if it overheats. We would have to manually add coolant or water if the rad got low, but you also don't have to place and plumb an extra tank underhood.

Andy4639 · 09-20-2013, 03:46 PM

OK then I'm good to go I have a over flow tank already!

09-09-2013, 06:05 PM	#1
mlevario99 Registered User Join Date: Apr 2010 Location: El Paso, TX Posts: 160	Water pump outlet to heather On the water pump for a 5.3 vortec, which of the two is the outlet for the heather, how is the water moving?? Thanks

09-09-2013, 09:56 PM	#2
truckdude239 Senior Member Join Date: Sep 2005 Location: Lewisville, Nc Posts: 10,217	Re: Water pump outlet to heather botgh of the 2 outlets are for the heater core i had 2 different size hoses on my heater core so they would only fit one way __________________ David fuller Ase Certified Mechanic Click here to help support our board!! 1971 Chevy c-10 under going a 4.8l LSx swap Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305 2007 Honda Accord my daily 145kmiles 2002 Honda Accord 4 door With 330k(sisters car) 2005 toyota Avalon 228k( brothers car) 2002 Sububran 5.3 245k 2000 Tahoe 5.3l 378 General manager for Marco's Carwash & lube

09-09-2013, 11:37 PM	#3
mlevario99 Registered User Join Date: Apr 2010 Location: El Paso, TX Posts: 160	Re: Water pump outlet to heather Thanks truckdude, but one has to be the supply and the other the return, this engine is in a 66 truck with the 5.3 and a vintage air conditioning Posted via Mobile Device

09-10-2013, 12:26 AM	#4
truckdude239 Senior Member Join Date: Sep 2005 Location: Lewisville, Nc Posts: 10,217	Re: Water pump outlet to heather Okay I put mine into my 71 so one port on my heater core was larger and matched the port on the pump and same for the other one I haven't run it yet Posted via Mobile Device __________________ David fuller Ase Certified Mechanic Click here to help support our board!! 1971 Chevy c-10 under going a 4.8l LSx swap Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305 2007 Honda Accord my daily 145kmiles 2002 Honda Accord 4 door With 330k(sisters car) 2005 toyota Avalon 228k( brothers car) 2002 Sububran 5.3 245k 2000 Tahoe 5.3l 378 General manager for Marco's Carwash & lube

09-10-2013, 02:56 PM	#6
Special-Ed Registered User Join Date: Jul 2013 Location: Floriduh Posts: 386	Re: Water pump outlet to heather Posted via Mobile Device Sorry but my engine compartment is dirty from Georgia clay and Florida sand. Obviously one is feed. One is return. big one = return little one = feed 2005 suburban z71 with 5.3 Posted via Mobile Device Attached Images __________________ Ed will be known as the Tiger Woods of the integration business Last edited by Special-Ed; 09-10-2013 at 03:03 PM.

09-10-2013, 03:11 PM	#8
Robznob11 Registered User Join Date: Feb 2004 Location: brownfield texas (west texas) Posts: 1,936	Re: Water pump outlet to heather Of chorse my phone wont let me post the image but if you google ls engine flow (images) the second one is a diagram and the back or smaller port is feed. Posted via Mobile Device __________________ The Ghost 67 short wide full custom. 550 hp LSX, 4l80E, narrowed 9". Body dropped w/air ride! ........................ ___ .........________//__{\_____ ,,,,,,,/__(⊙)___//___/__(O)_/ @disciple2.rc 💪instagram💪 LED TAILS

09-10-2013, 03:18 PM	#9
mlevario99 Registered User Join Date: Apr 2010 Location: El Paso, TX Posts: 160	Re: Water pump outlet to heather Thank you all Posted via Mobile Device

09-10-2013, 03:23 PM	#10
Special-Ed Registered User Join Date: Jul 2013 Location: Floriduh Posts: 386	Re: Water pump outlet to heather im not sure... i have a replacement water pump and i think my casting is bad. i have little to no heat in the truck.... not a big issue when im in florida... but i froze my azz off when i went to chicago for the holidays to hang out with my kids... its pissing me off as well... i eat about 1/2 gallon every 6 months of anti freeze... i find no leaks,(die black light) holds pressure, no exhaust fumes bubbling in coolant, no signs on plugs... but every once in a while i smell steaming coolant... thinking it may be a dodgy pressure cap. or it could be seeping into the intake somehow and leaning out the fuel mixture but still being burned... i dont know enough about my engine to know off the top of my head every coolant port inside the motor and where they may leak. i was the guy at the factory that dealt with quad 4's and the 3.4 twin dual ohd motors... and other assorted items for PMD... the return seems like it needs to be ported to the other side of the tstat for flow to actually happen... __________________ Ed will be known as the Tiger Woods of the integration business Last edited by Special-Ed; 09-10-2013 at 03:33 PM.

09-10-2013, 09:44 PM	#11
Robznob11 Registered User Join Date: Feb 2004 Location: brownfield texas (west texas) Posts: 1,936	Re: Water pump outlet to heather http://i17.photobucket.com/albums/b8...oolingflow.jpg __________________ The Ghost 67 short wide full custom. 550 hp LSX, 4l80E, narrowed 9". Body dropped w/air ride! ........................ ___ .........________//__{\_____ ,,,,,,,/__(⊙)___//___/__(O)_/ @disciple2.rc 💪instagram💪 LED TAILS

09-11-2013, 10:20 PM	#15
ls1nova71 Registered User Join Date: Dec 2009 Location: Independence Mo Posts: 4,118	Re: Water pump outlet to heather The heater shut off goes in the small hose, the rear fitting on the engine, if that's what you're asking. __________________ 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

09-12-2013, 08:26 AM	#16
mlevario99 Registered User Join Date: Apr 2010 Location: El Paso, TX Posts: 160	Re: Water pump outlet to heather Yes, that is what I was looking for, i did a search like Robznob11 suggested and found a diagram. Thanks Posted via Mobile Device

09-12-2013, 08:40 AM	#17
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	Re: Water pump outlet to heather i have a nurse called heather she is hot but i've never seen her outlets __________________ 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

09-12-2013, 10:46 AM	#18
mlevario99 Registered User Join Date: Apr 2010 Location: El Paso, TX Posts: 160	Re: Water pump outlet to heather Here is the picture I found

09-20-2013, 12:50 PM	#19
Andy4639 Old member Join Date: Jan 2002 Location: Liberty, & Garden City S.C. , U.S. Posts: 19,936	Re: Water pump outlet to heather Are u guys all using the pressure tank (surge tank) in the swaps on 67-72 trucks that is posted above.? __________________ 1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.

09-20-2013, 01:09 PM	#20
mlevario99 Registered User Join Date: Apr 2010 Location: El Paso, TX Posts: 160	Re: Water pump outlet to heather I'm not using it Posted via Mobile Device



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09-20-2013, 01:50 PM	#21
BR3W CITY meowMEOWmeowMEOW Join Date: Sep 2009 Location: MKE WI Posts: 7,128	Re: Water pump outlet to heather That is designed for sealed radiators that use a remote surge tank (kinda like using the ps pumps that have a remote resevoir). If your radiator has a cap with a pressure rating, then your don't need that. The idea is that it keeps some extra fluid and give the fluid a place to go under. It also helps keep a full radiator since it hold extra fluid that can drain into the rad if it gets low. Most of us have a regular capped radiator. You fill the rad, and run an overflow so it has a safe place to dump if it overheats. We would have to manually add coolant or water if the rad got low, but you also don't have to place and plumb an extra tank underhood. __________________ *'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING* MY BUILD THE H8RDCPTR //\\ MY YOUTUBE CHANNEL REV J HD

09-20-2013, 03:46 PM	#22
Andy4639 Old member Join Date: Jan 2002 Location: Liberty, & Garden City S.C. , U.S. Posts: 19,936	Re: Water pump outlet to heather OK then I'm good to go I have a over flow tank already! __________________ 1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.

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