335 Series Engine Forum - Heater Hose Routing

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Heater Hose Routing

Printed From: The Ford Torino Page
Category: Powertrain Specific Forum
Forum Name: 335 Series Engine Forum
Forum Description: 351C, 351M and 400 engines
URL: https://forum.grantorinosport.org/forum_posts.asp?TID=16027
Printed Date: 24-April-2024 at 12:43AM
Software Version: Web Wiz Forums 12.06 - https://www.webwizforums.com

Topic: Heater Hose Routing

Posted By: changinlatitudes
Subject: Heater Hose Routing
Date Posted: 05-March-2017 at 1:45AM

Replaced heater hoses and heater control valve recently. Out of curiosity, I googled pics and also looked at several engine bays on several FB sites. In regards to inlet/outlet routing, it seems there is no logical pattern to running them on 351C motors. Some have them going from the water pump to the left side of the heater core, some have them coming out of the block and into the left side of the heater core, and then there is every combination after that. Seems like there's no hard and fast rule, other then if you want heat faster, have the inlet come out of the water pump? But which is the inlet and which is the outlet on a heater core...or does it matter? How did it come out of the factory?

Raises more questions then answers. Shoulda never looked on the internet to begin with!

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Matt

1969 Mercury Marauder 390
1972 Montego MX
2003 Mercury Marauder 300A
1994 F-150 5.8
2016 Ford Fusion Titanium

Replies:

Posted By: Power Surge
Date Posted: 05-March-2017 at 3:53AM

It doesn't matter which of the tube on the heater core your inlet and outlet go to, it's not flow directional.

However, you should have your heater control valve on the inlet hose going to the heater core.

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Sal Mennella
73 GTS 351 CJ
75 Cougar XR7
73 Ranchero - 5.0 Coyote swap - in progress
Past Torinos - 72 Gran Torino, 75 Gran Torino, 75 Elite

Posted By: californiajohnny
Date Posted: 05-March-2017 at 4:07AM

doesn't matter

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JOHN
74 GRAN TORINO S&H CLONE
74 VETTE CUSTOM
90 S10 BLAZER 4X4 LIFTED
77 CELICA CUSTOM
75 V8 MONZA SUPERCHARGED
79 COURIER VERT. SLAMMED
75 VEGA V6 5 SPD
70 CHEV C10 P/U
68 MUSTANG FB CONVERSION

Posted By: changinlatitudes
Date Posted: 08-March-2017 at 1:40AM

Cool. So the inlet hose should be coming from the water pump....

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Matt

1969 Mercury Marauder 390
1972 Montego MX
2003 Mercury Marauder 300A
1994 F-150 5.8
2016 Ford Fusion Titanium