Heater hose flow control fitting
Thread Starter
Drifting
Joined: Jan 2001
Posts: 1,408
Likes: 13
From: Dayton, Ohio
Heater hose flow control fitting
I’m hoping for some help guys,
my project is an ‘89 with a 383 small block. It’s been a looong time coming for this project and when I got it on the dyno it blew out the heater core. I recognize age could have been the issue, but before I go too far I need advice. The engine was out when I got the car so I have no reference on it.
Where does the heater flow control valve go, on the intake manifold or in the side of the water pump? I’ve got a valve on the way, but I need to know where it goes.
thanks for any help/advice you can share!
my project is an ‘89 with a 383 small block. It’s been a looong time coming for this project and when I got it on the dyno it blew out the heater core. I recognize age could have been the issue, but before I go too far I need advice. The engine was out when I got the car so I have no reference on it.
Where does the heater flow control valve go, on the intake manifold or in the side of the water pump? I’ve got a valve on the way, but I need to know where it goes.
thanks for any help/advice you can share!
Race Director
Joined: Jun 2004
Posts: 13,961
Likes: 707
From: WI
From memory it was around the passenger exhaust manifold but I remove those valves usually. With water flowing through the core full time it's less likely to have corrosion issues from my experiences.
Thread Starter
Drifting
Joined: Jan 2001
Posts: 1,408
Likes: 13
From: Dayton, Ohio
I’m not sure where on the exhaust manifold you’re describing, but the one I’m using looks like a regular hose fitting that screws in the intake manifold or water pump. The valve part of it is a one-way valve inside the fitting.
Race Director
Joined: Jun 2004
Posts: 13,961
Likes: 707
From: WI
The thermostat?
The water valve to stop anti freeze going to the heater core in summer can be anywhere, I remember it being around the exhaust manifold area. Put it anywhere there is room or put stock hoses on and it should be obvious then. I usually buy my own heater hose and cut to fit so I don't know if stock is available.
The water valve to stop anti freeze going to the heater core in summer can be anywhere, I remember it being around the exhaust manifold area. Put it anywhere there is room or put stock hoses on and it should be obvious then. I usually buy my own heater hose and cut to fit so I don't know if stock is available.
Thread Starter
Drifting
Joined: Jan 2001
Posts: 1,408
Likes: 13
From: Dayton, Ohio
The thermostat?
The water valve to stop anti freeze going to the heater core in summer can be anywhere, I remember it being around the exhaust manifold area. Put it anywhere there is room or put stock hoses on and it should be obvious then. I usually buy my own heater hose and cut to fit so I don't know if stock is available.
The water valve to stop anti freeze going to the heater core in summer can be anywhere, I remember it being around the exhaust manifold area. Put it anywhere there is room or put stock hoses on and it should be obvious then. I usually buy my own heater hose and cut to fit so I don't know if stock is available.
Stock hoses aren’t really available. Some places have hoses that are plumbed with plastic T-fittings, but the OEM was all molded. Either way, my car was a big model kit when i got it and now I’m trying to figure out what’s what.
Thread Starter
Drifting
Joined: Jan 2001
Posts: 1,408
Likes: 13
From: Dayton, Ohio
Race Director
Joined: Jun 2004
Posts: 13,961
Likes: 707
From: WI
I think this is the part you want https://www.rockauto.com/en/moreinfo...t=6860&jsn=791
I thought you were talking about the valve that is on the heater hose.
I thought you were talking about the valve that is on the heater hose.
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Thread Starter
Drifting
Joined: Jan 2001
Posts: 1,408
Likes: 13
From: Dayton, Ohio
I think this is the part you want https://www.rockauto.com/en/moreinfo...t=6860&jsn=791
I thought you were talking about the valve that is on the heater hose.
I thought you were talking about the valve that is on the heater hose.
Now I’ll need to find a day to swap out the heater core.
Thanks again!
Last edited by Yguy; Jul 20, 2025 at 11:38 PM. Reason: Clarification