Coolant flow ---<<<--- direction --->>>---
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Elder User
Joined: Aug 2011
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From: Sweet home Alabama
Coolant flow ---<<<--- direction --->>>---
Im in process of putting in my Vintage Air system and need to know which way the coolant flows,Im assuming it come from the water pump nipple->- to the heater core ->- back into the engine at the side nipple,Dont want to start it to find out and have it puking my antifreeze all over.
Clueless spectator!
Joined: Aug 2010
Posts: 1,587
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From: Denver, CO
Good that you asked!
FordF250 and I were trying to figure this out, and we found out through various means that the coolant definitely flows from the head port through the heater core then back to the water pump. Here is your proof.
7.3 IDI Diesel coolant filter. - YouTube
7.3 IDI Diesel coolant filter. - YouTube
Clueless spectator!
Joined: Aug 2010
Posts: 1,587
Likes: 6
From: Denver, CO
It wasn't all the way warm, but it ran for way too long for it to be just residual run off. Plus Ford found a coolant system diagram that confirmed it. It is all in a thread on here somewhere. I'll see if I can find it.
Clueless spectator!
Joined: Aug 2010
Posts: 1,587
Likes: 6
From: Denver, CO
Clueless spectator!
Joined: Aug 2010
Posts: 1,587
Likes: 6
From: Denver, CO
Glad to help, I thought the same thing, then realized it could flow either way. It does make sense that the water would be coming directly to the heater core from the cylinder head where it is the hottest when you think about it though.
Good luck,
Mac.
Good luck,
Mac.
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i ain't rite
Joined: Mar 2005
Posts: 65,447
Likes: 5,517
From: Marlboro Mental Hospital.
you also want the coolant flowing into the lower nipple of the heater core, and returning to the engine from the upper nipple. this ensures the core is full of coolant.
hooking it up the other way could result in a waterfall sound coming out of the heater box.
hooking it up the other way could result in a waterfall sound coming out of the heater box.
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