[DeTomaso] Cooling System

[jderyke at aol.com]

Straight outlet- and one only. The lower outlet on the pumps runs into the alternator when you're shifting it to change belts and restricts the amount of adjustment. I pull the non-useable outlet stub off new pumps and use a freeze plug of suitable size to plug the hole. The outlet stubs are only pressed in. Some owners try to "fix" this by threading the hole and using pipe threads. Bad idea- the aluminum castings are not designed to take the spreading pressure of a tapered pipe thread and its possible to split the casting with pipe fittings. I've done that- to a new pump, and had to TIG-weld the crack and hope I hadn't heated things up enough to cook the internal seal. I got lucky- no leaks. YMMV.

The pipe-threaded hole in the swirl tank is not a good choice for ANY sensor that must always be at engine water temps. A small amount of water loss from your cooling system will uncover any sensor and give an erroneous reading.

 


And, while on the subject of cooling, do folks typically use straight
outlets from aftermarket (edelbrock) aluminum water pumps for the heater
pipes or are pipes that angle at 45 or 90 degrees preferred.  

I noted that the temperature sender was located at the front of 5332's
block, rather than on the swirl tank.  But, that hole looks to be a good fit
for the MSD fuel injection temperature sensor.  Is there an inherent problem
with having the temperature sender on the swirl tank?  Or is there a better
place to put the temperature gauges sender?


 

 

 

-----Original Message-----
From: Stephen Nelson <steve at snclocks.com>
To: detomaso <detomaso at poca.com>
Sent: Mon, Jul 7, 2014 11:15 am
Subject: Re: [DeTomaso] Cooling System


Whilst I have spent some time looking around on the internet I haven't
managed to find a good diagram of the cooling system, including the heater
system.  Is there a good diagram out there?  

And, while on the subject of cooling, do folks typically use straight
outlets from aftermarket (edelbrock) aluminum water pumps for the heater
pipes or are pipes that angle at 45 or 90 degrees preferred.  

I noted that the temperature sender was located at the front of 5332's
block, rather than on the swirl tank.  But, that hole looks to be a good fit
for the MSD fuel injection temperature sensor.  Is there an inherent problem
with having the temperature sender on the swirl tank?  Or is there a better
place to put the temperature gauges sender?

Stephen Nelson
 


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-------------- next part --------------
   Straight outlet- and one only. The lower outlet on the pumps runs into
   the alternator when you're shifting it to change belts and restricts
   the amount of adjustment. I pull the non-useable outlet stub off new
   pumps and use a freeze plug of suitable size to plug the hole. The
   outlet stubs are only pressed in. Some owners try to "fix" this by
   threading the hole and using pipe threads. Bad idea- the aluminum
   castings are not designed to take the spreading pressure of a tapered
   pipe thread and its possible to split the casting with pipe fittings.
   I've done that- to a new pump, and had to TIG-weld the crack and hope I
   hadn't heated things up enough to cook the internal seal. I got lucky-
   no leaks. YMMV.
   The pipe-threaded hole in the swirl tank is not a good choice for ANY
   sensor that must always be at engine water temps. A small amount of
   water loss from your cooling system will uncover any sensor and give an
   erroneous reading.

And, while on the subject of cooling, do folks typically use straight
outlets from aftermarket (edelbrock) aluminum water pumps for the heater
pipes or are pipes that angle at 45 or 90 degrees preferred.

I noted that the temperature sender was located at the front of 5332's
block, rather than on the swirl tank.  But, that hole looks to be a good fit
for the MSD fuel injection temperature sensor.  Is there an inherent problem
with having the temperature sender on the swirl tank?  Or is there a better
place to put the temperature gauges sender?

   -----Original Message-----
   From: Stephen Nelson <steve at snclocks.com>
   To: detomaso <detomaso at poca.com>
   Sent: Mon, Jul 7, 2014 11:15 am
   Subject: Re: [DeTomaso] Cooling System
Whilst I have spent some time looking around on the internet I haven't
managed to find a good diagram of the cooling system, including the heater
system.  Is there a good diagram out there?

And, while on the subject of cooling, do folks typically use straight
outlets from aftermarket (edelbrock) aluminum water pumps for the heater
pipes or are pipes that angle at 45 or 90 degrees preferred.

I noted that the temperature sender was located at the front of 5332's
block, rather than on the swirl tank.  But, that hole looks to be a good fit
for the MSD fuel injection temperature sensor.  Is there an inherent problem
with having the temperature sender on the swirl tank?  Or is there a better
place to put the temperature gauges sender?

Stephen Nelson



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