292 Heater Hose Routing ? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

54blackhornet · 02-11-2014, 06:57 PM

Hooking up a heater in my 68 GMC with a 292, any one have a picture of the hose routing ? Thanks

**LockDoc** · 02-11-2014, 10:18 PM

-
This maybe? #1

Or this? #2

I'm not sure it makes a difference on the six but maybe someone that is sharper than me on them will chime in....

LockDoc

**'68OrangeSunshine** · 02-11-2014, 10:24 PM

I might have a shot...

pritch · 02-11-2014, 10:42 PM

The question is, I think, is should the water pump up through the core or down through the core. I'm sure there is a correct way, but I doubt if it makes much difference overall.

SS Tim · 02-11-2014, 11:48 PM

The correct flow is from the t-stat housing to the lower heater core nipple (the inlet). Then it runs from the upper heater core nipple (the outlet) to the water pump. While I am not positive, IIRC the HD cooling, automatic or A/C trucks returned to the radiator as did V-8s.
The reason it flows this way (bottom up) is to purge trapped air (pockets) from the heater core which would cause it to be cool.

54blackhornet · 02-12-2014, 12:11 PM

Thank you to all for the information ! Another question about the core position in its housing ? Is the 3/4 connection the inlet or the outlet ? My wife is yelling about the heater parts all over the kitchen table !.......

Wrenchbender Ret · 02-12-2014, 12:15 PM

The 3/4 " tube is the outlet.

Asshat · 11-13-2020, 07:05 PM

Is this correct?

1.to small inlet of core
2.to large outlet of core
3. to radiator

**CarolinaHD** · 11-13-2020, 07:10 PM

Quote:

Originally Posted by Asshat

Is this correct?

1.to small inlet of core
2.to large outlet of core
3. to radiator

Correct, here is my 67 c50 for reference.

Asshat · 11-13-2020, 07:21 PM

Quote:

Originally Posted by CarolinaHD

Correct, here is my 67 c50 for reference.

Ok. Thanks.
The only difference, mine has only one threaded port on the passenger side of the thermostat.

**CarolinaHD** · 11-13-2020, 09:25 PM

Here are the differences over the years in thermostat housings and water pumps. The pics are not mine*

02-11-2014, 10:24 PM	#3
'68OrangeSunshine Senior Member Join Date: Feb 2002 Location: Tucson, AZ USA Posts: 7,517	Re: 292 Heater Hose Routing ? I might have a shot... Attached Images __________________ Every 25 years I like to rebuild that 292, whether it needs it or not.

02-11-2014, 10:42 PM	#4
pritch Registered User Join Date: Mar 2004 Location: Hoytsville, Utah Posts: 3,365	Re: 292 Heater Hose Routing ? The question is, I think, is should the water pump up through the core or down through the core. I'm sure there is a correct way, but I doubt if it makes much difference overall. __________________ '68 Panel Project Boogie Chillin' '68 C-10 Ol' Green

02-11-2014, 11:48 PM	#5
SS Tim Registered User Join Date: Aug 2010 Location: Edwards, CA Posts: 7,503	Re: 292 Heater Hose Routing ? The correct flow is from the t-stat housing to the lower heater core nipple (the inlet). Then it runs from the upper heater core nipple (the outlet) to the water pump. While I am not positive, IIRC the HD cooling, automatic or A/C trucks returned to the radiator as did V-8s. The reason it flows this way (bottom up) is to purge trapped air (pockets) from the heater core which would cause it to be cool. Attached Images __________________ Thanks, Tim * VIN/Model Decoders * Power Team Charts (engine/transmission/gear ratio) * Post Your Pickup SPID Blazer SPID Suburban/Panel SPID * RTFM ... Read The Factory Manuals... download 'em here Highlanders Do you have a 1972 Plaid Pickup? Plaid Blazer ** Plaid Suburban

02-12-2014, 12:11 PM	#6
54blackhornet Registered User Join Date: Jul 2008 Location: Eastern Oregon Posts: 2,393	Re: 292 Heater Hose Routing ? Thank you to all for the information ! Another question about the core position in its housing ? Is the 3/4 connection the inlet or the outlet ? My wife is yelling about the heater parts all over the kitchen table !....... __________________ 71 C-20 07 Magnum RT AWD

02-12-2014, 12:15 PM	#7
Wrenchbender Ret Registered User Join Date: Oct 2005 Location: Overland Park, Ks. Posts: 5,229	Re: 292 Heater Hose Routing ? The 3/4 " tube is the outlet.

02-11-2014, 06:57 PM	#1
54blackhornet Registered User Join Date: Jul 2008 Location: Eastern Oregon Posts: 2,393	292 Heater Hose Routing ? Hooking up a heater in my 68 GMC with a 292, any one have a picture of the hose routing ? Thanks __________________ 71 C-20 07 Magnum RT AWD

02-11-2014, 10:18 PM	#2
LockDoc The Older Generation Join Date: Aug 2006 Location: Montezuma, Iowa Posts: 25,818	Re: 292 Heater Hose Routing ? - This maybe? #1 Or this? #2 I'm not sure it makes a difference on the six but maybe someone that is sharper than me on them will chime in.... LockDoc Attached Images __________________ Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 - Last edited by LockDoc; 02-11-2014 at 10:39 PM.

11-13-2020, 07:05 PM	#8
Asshat Registered User Join Date: Jul 2015 Location: South Orange County CA Posts: 1,265	Re: 292 Heater Hose Routing ? Is this correct? 1.to small inlet of core 2.to large outlet of core 3. to radiator Attached Images __________________ 1963 C20, small window, long bed 292, 4-speed

11-13-2020, 09:25 PM	#11
CarolinaHD Moderator Join Date: Aug 2017 Location: Cabarrus Posts: 418	Re: 292 Heater Hose Routing ? Here are the differences over the years in thermostat housings and water pumps. The pics are not mine* Attached Images __________________ Alex 1967 C50 292ci Lumber truck 1967 C50 292ci Dump truck 1967 C60 366ci Fire truck



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