[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

_______________________________________________


Detomaso Email List is not managed by POCA
Posted emails must not exceed 1.5 Megabytes
DeTomaso mailing list
DeTomaso at server.detomasolist.com
<mailto:DeTomaso at server.detomasolist.com> 
http://server.detomasolist.com/mailman/listinfo/detomaso

To manage your subscription (change email address, unsubscribe, etc.)
use the links above.

Members who post to this list grant license to the list to forward any
message posted here to all past, current, or future members of the list.
They also grant the list owner permission to maintain an archive or
approve the archiving of list messages.


-------------- 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
   DeTomaso mailing list
   [7]DeTomaso at server.detomasolist.com
   [8]http://server.detomasolist.com/mailman/listinfo/detomaso
   To manage your subscription (change email address, unsubscribe, etc.)
   use the links above.
   Members who post to this list grant license to the list to forward any
   message posted here to all past, current, or future members of the
   list. They also grant the list owner permission to maintain an archive
   or approve the archiving of list messages.

References

   1. mailto:julian_kift at hotmail.com
   2. mailto:cengles at cox.net
   3. mailto:detomaso at server.detomasolist.com
   4. mailto:detomaso-bounces at server.detomasolist.com
   5. mailto:cengles at cox.net
   6. mailto:detomaso at server.detomasolist.com
   7. mailto:DeTomaso at server.detomasolist.com
   8. http://server.detomasolist.com/mailman/listinfo/detomaso


More information about the DeTomaso mailing list