[DeTomaso] Techno Question: The Proper and Correct Waytoconnect the engine heater hoses to the central heater tubes
Tomas Gunnarsson
guson at home.se
Tue Apr 18 03:02:17 EDT 2017
The water pump sucks water from the radiator and heater core and pushes
it through the block if I'm not mistaken. That means that if the heater
core is located between the closed heater valve and pump it's subject to
the lowest pressure existing in the coolant system.
Tomas
<-----Ursprungligt Meddelande----->
From: Guido deTomaso [guido_detomaso at prodigy.net]
Sent: 18/4/2017 2:50:53 AM
To: guson at home.se;julian_kift at hotmail.com
Cc: detomaso at server.detomasolist.com
Subject: Re: [DeTomaso] Techno Question: The Proper and Correct
Waytoconnect the engine heater hoses to the central heater tubes
I've seen a couple heater cores, American cars not Panteras, blow up
simultaneous with high engine RPM. So I conclude the water pump can
deliver some pressure. Any valve blocking the water flow to the heater
core I'd put upstream of the heater core, so the heater core is not
between the water pump and a closed valve.
GD
_____
From: Tomas Gunnarsson <guson at home.se>
To: julian_kift at hotmail.com
Cc: detomaso at server.detomasolist.com
Sent: Monday, April 10, 2017 8:34 AM
Subject: Re: [DeTomaso] Techno Question: The Proper and Correct Way
toconnect the engine heater hoses to the central heater tubes
Julian,
I'd say that the things you mention are marginal. Let me explain: a)
The static pressure in the system is totally dominating over the
pressure difference from block outlet to water pump inlet. Even with
the valve closed static pressure on the low side is almost as high as
the highest pressure in the rest of the system. c) Any air will purge
when the valve is (fully) open anyway due to the small cross section
of
the passages.
What I saw when I opened the valve was that it tends to open with
pressure in one direction and close with pressure in the other. I
think
that's of higher importance to address.
Addition: It seems though that the proper flow direction is in fact
from the heater core, through the valve to the suction side of the
water pump as you wrote.
Tomas
<-----Ursprungligt Meddelande----->
From: Julian Kift [ julian_kift at hotmail.com
<mailto:julian_kift at hotmail.com> ]
Sent: 10/4/2017 5:57:07 AM
To: cengles at cox.net <mailto:cengles at cox.net> ;
detomaso at server.detomasolist.com
<mailto:detomaso at server.detomasolist.com>
Subject: Re: [DeTomaso] Techno Question: The Proper and Correct Way
toconnect the engine heater hoses to the central heater tubes
Chuck,
I believe the hot engine block (feed) should go to the heater control
valve and the cooler return to the water pump. This would make sense
to
me for a number of reasons; a) be able to shut off the hot side prior
to entry to the heater and prevent over pressuring of the heater core
and b) the water pump is a suction pump pulling the return and c) the
heater valve is on the lower side of the heater core thus feed on this
side allows air to be purged up and out with direction of flow.
The heater valve in diagrams is connected to the right hand tube,
however in going to good effort to do all correctly it is worth
verifying that the two short sections of hose under the driver kick
panel are in good order and connected to the correct tube.
Julian
________________________________
From: DeTomaso < detomaso-bounces at server.detomasolist.com
<mailto:detomaso-bounces at server.detomasolist.com> > on behalf of
Charles Engles < cengles at cox.net <mailto:cengles at cox.net> >
Sent: Sunday, April 9, 2017 3:17 PM
To: detomaso at server.detomasolist.com
<mailto:detomaso at server.detomasolist.com>
Subject: [DeTomaso] Techno Question: The Proper and Correct Way to
connect the engine heater hoses to the central heater tubes
Dear Forum,
Yes, I am still wrestling with the heater hoses. In
years gone by, I simply connected them up willy-nilly. So far, no
catastrophic heater core failure. I recall seeing someone mention the
correct and proper way to connect the heater hoses from the water pump
and
the engine block to the central heater tubes so that the hot water
flow
to
and from the heater core is correct. I just reviewed the factory
manuals
and Ford parts book without finding any answer.
So, does anyone know the answer to the mystery of
which way to connect the right and left central heater tubes to the
engine
block and water pump hoses??
Warmest regards, Chuck Engles
_______________________________________________
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-------------- next part --------------
The water pump sucks water from the radiator and heater core and pushes
it through the block if I'm not mistaken. That means that if the heater
core is located between the closed heater valve and pump it's subject
to the lowest pressure existing in the coolant system.
Tomas
<-----Ursprungligt Meddelande----->
From: Guido deTomaso [guido_detomaso at prodigy.net]
Sent: 18/4/2017 2:50:53 AM
To: guson at home.se;julian_kift at hotmail.com
Cc: detomaso at server.detomasolist.com
Subject: Re: [DeTomaso] Techno Question: The Proper and Correct
Waytoconnect the engine heater hoses to the central heater tubes
I've seen a couple heater cores, American cars not Panteras, blow up
simultaneous with high engine RPM. So I conclude the water pump can
deliver some pressure. Any valve blocking the water flow to the heater
core I'd put upstream of the heater core, so the heater core is not
between the water pump and a closed valve.
GD
__________________________________________________________________
From: Tomas Gunnarsson <guson at home.se>
To: julian_kift at hotmail.com
Cc: detomaso at server.detomasolist.com
Sent: Monday, April 10, 2017 8:34 AM
Subject: Re: [DeTomaso] Techno Question: The Proper and Correct Way
toconnect the engine heater hoses to the central heater tubes
Julian,
I'd say that the things you mention are marginal. Let me explain: a)
The static pressure in the system is totally dominating over the
pressure difference from block outlet to water pump inlet. Even with
the valve closed static pressure on the low side is almost as high as
the highest pressure in the rest of the system. c) Any air will purge
when the valve is (fully) open anyway due to the small cross section
of
the passages.
What I saw when I opened the valve was that it tends to open with
pressure in one direction and close with pressure in the other. I
think
that's of higher importance to address.
Addition: It seems though that the proper flow direction is in fact
from the heater core, through the valve to the suction side of the
water pump as you wrote.
Tomas
<-----Ursprungligt Meddelande----->
From: Julian Kift [[1]julian_kift at hotmail.com]
Sent: 10/4/2017 5:57:07 AM
To: [2]cengles at cox.net;[3]detomaso at server.detomasolist.com
Subject: Re: [DeTomaso] Techno Question: The Proper and Correct Way
toconnect the engine heater hoses to the central heater tubes
Chuck,
I believe the hot engine block (feed) should go to the heater control
valve and the cooler return to the water pump. This would make sense
to
me for a number of reasons; a) be able to shut off the hot side prior
to entry to the heater and prevent over pressuring of the heater core
and b) the water pump is a suction pump pulling the return and c) the
heater valve is on the lower side of the heater core thus feed on
this
side allows air to be purged up and out with direction of flow.
The heater valve in diagrams is connected to the right hand tube,
however in going to good effort to do all correctly it is worth
verifying that the two short sections of hose under the driver kick
panel are in good order and connected to the correct tube.
Julian
________________________________
From: DeTomaso <[4]detomaso-bounces at server.detomasolist.com> on
behalf of
Charles Engles <[5]cengles at cox.net>
Sent: Sunday, April 9, 2017 3:17 PM
To: [6]detomaso at server.detomasolist.com
Subject: [DeTomaso] Techno Question: The Proper and Correct Way to
connect the engine heater hoses to the central heater tubes
Dear Forum,
Yes, I am still wrestling with the heater hoses. In
years gone by, I simply connected them up willy-nilly. So far, no
catastrophic heater core failure. I recall seeing someone mention the
correct and proper way to connect the heater hoses from the water
pump
and
the engine block to the central heater tubes so that the hot water
flow
to
and from the heater core is correct. I just reviewed the factory
manuals
and Ford parts book without finding any answer.
So, does anyone know the answer to the mystery of
which way to connect the right and left central heater tubes to the
engine
block and water pump hoses??
Warmest regards, Chuck Engles
_______________________________________________
Detomaso Email List is not managed by POCA
Posted emails must not exceed 1.5 Megabytes
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References
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