09-13-2016, 12:28 PM | #26 |
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Location: West Virginia
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Re: Does it matter?
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09-13-2016, 01:37 PM | #27 |
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Join Date: Aug 2009
Location: Bowser
Posts: 13,533
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Re: Does it matter?
Right from the factory!
Correct for a six banger. Thermo housing to the bottom of core. Top of core back to the water pump. |
12-20-2017, 02:38 PM | #28 |
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Join Date: Nov 2017
Location: NC
Posts: 35
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Re: Does it matter?
I know this is an older thread but is correct that the top heater core hose goes to the water pump and the bottom goes to the intake
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12-20-2017, 09:34 PM | #29 |
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Join Date: May 2016
Location: Fort Mohave, AZ
Posts: 366
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Re: Does it matter?
Same here. What size hose fits the heater control valve?
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1970 GMC 2500 700R Trans RideTech 4 link rear suspension - Air Bagged on all four corners 350 SBC 300hp Weiand Supercharger FiTech EFI |
12-20-2017, 09:42 PM | #30 |
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Join Date: Apr 2008
Location: Milton wi. 53563
Posts: 128
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Re: Does it matter?
old school way to remember, bottom hose to top and top hose to bottom. no matter how you looked at it. it always worked. old money
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12-20-2017, 10:27 PM | #31 |
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Join Date: Jan 2002
Location: Liberty, & Garden City S.C. , U.S.
Posts: 19,936
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Re: Does it matter?
Ok here is my take. The inlet of the heater core is the bottom hose this makes sure you get all the air out of the core when filling it. Same as a transmission cooler. This should be the line form the intake.
The water pump is pulling the cool water from the bottom of the radiator and pumping it through the engine so it would also pull from the core as well. The pump is hooked to the top fitting of the heater core. Another note. if your truck has AC and it has heat under the dash when your AC is on your not getting full benefit of your AC. I put a manual valve in the line to insure no hot water comes in the cab when the AC is on. It's worth a good 5 more degree's inside the cab!
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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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