Complex overheating/overcooling problem...need knowledgeable help...I'VE HAD IT
Posting Guru
Joined: Dec 2006
Posts: 1,639
Likes: 2
i would replace the heater core or run a nipple between your heater hoses to bypass the heater core and see how it works then, i think that's your problem it's really tough to get all the crap out of it if there is crap in it
and i know this might not pertain to you but i worked on a mustang witha 347 stroker motor and yates (sp?) heads that would suck the bottom radiator hose shut at around 8,000 rpms and it even had a spring in it we replaced it with exhaust pipe that we cut and welded to the right dimentions no problem since as far as i know, the car would overheat after running the 1/4 and overheat bad
and i know this might not pertain to you but i worked on a mustang witha 347 stroker motor and yates (sp?) heads that would suck the bottom radiator hose shut at around 8,000 rpms and it even had a spring in it we replaced it with exhaust pipe that we cut and welded to the right dimentions no problem since as far as i know, the car would overheat after running the 1/4 and overheat bad
Fleet Owner
Joined: Jan 2008
Posts: 26,898
Likes: 3
From: southern md
i would replace the heater core or run a nipple between your heater hoses to bypass the heater core and see how it works then, i think that's your problem it's really tough to get all the crap out of it if there is crap in it
and i know this might not pertain to you but i worked on a mustang witha 347 stroker motor and yates (sp?) heads that would suck the bottom radiator hose shut at around 8,000 rpms and it even had a spring in it we replaced it with exhaust pipe that we cut and welded to the right dimentions no problem since as far as i know, the car would overheat after running the 1/4 and overheat bad
and i know this might not pertain to you but i worked on a mustang witha 347 stroker motor and yates (sp?) heads that would suck the bottom radiator hose shut at around 8,000 rpms and it even had a spring in it we replaced it with exhaust pipe that we cut and welded to the right dimentions no problem since as far as i know, the car would overheat after running the 1/4 and overheat bad
Lead Driver
Joined: Nov 2002
Posts: 9,557
Likes: 44
From: Concord, NC
Since the cooling system is a closed loop, is it possible for the lower radiator hose be sucked closed without either a leak in the system on the outlet side of the pump, or a severely clogged radiator?
Fleet Owner
Joined: Aug 2005
Posts: 23,667
Likes: 301
From: Easton,Ks
I do not see why not at high RPM coming home empty like he was.
Fleet Owner
Joined: Aug 2005
Posts: 23,667
Likes: 301
From: Easton,Ks
The water pump takes suction on the bottom and as long as there is any water in the radiator there is resistance to the flow of the water going down through the radiator. It would not make any difference if the cap is on or off closed system or not. At higher RPM the bottom hose can block this flow if there is not a spring inside the hose or a spring made into the Hose. Maybe not a new hose but when it gets hot and flexible (older) it will.
The big three auto Co. have been putting these springs in the bottom hose starting in at least the 1940s.
Postmaster
Joined: Oct 2008
Posts: 3,026
Likes: 0
From: Renton, WA
I do not understand what a leak would have to do with it.
The water pump takes suction on the bottom and as long as there is any water in the radiator there is resistance to the flow of the water going down through the radiator. It would not make any difference if the cap is on or off closed system or not. At higher RPM the bottom hose can block this flow if there is not a spring inside the hose or a spring made into the Hose. Maybe not a new hose but when it gets hot and flexible (older) it will.
The big three auto Co. have been putting these springs in the bottom hose starting in at least the 1940s.
The water pump takes suction on the bottom and as long as there is any water in the radiator there is resistance to the flow of the water going down through the radiator. It would not make any difference if the cap is on or off closed system or not. At higher RPM the bottom hose can block this flow if there is not a spring inside the hose or a spring made into the Hose. Maybe not a new hose but when it gets hot and flexible (older) it will.
The big three auto Co. have been putting these springs in the bottom hose starting in at least the 1940s.
Fleet Owner
Joined: Aug 2005
Posts: 23,667
Likes: 301
From: Easton,Ks
The key word here is HELP but that is not enough sometimes if the radiator resistance is high enough.
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