[DeTomaso] 2 Questions - Water Pump Torque & Heater Hose Routing

[Barry Seib]

Tomas Gunnarsson guson at home.se
Tue May 19 13:41:03 CDT 2009
>>The pipe in the center below the firewall and closest to the drivers side
in the engine compartment is normally hooked up the the heater valve and it
should be the retun to the water pump. The other pipe on the passenger side
should be the feed to the heater from the little steel pipe in the top of
the block. This assumes the factory routing of the heater hoses and pipes.
No guarantee someone hasn't changed that, but it would be more difficult
than doing it the same as the factory.
  The heater control valve is designed to be on the return side of the core.
It should hold pressure in the core rather than control the intake. That may
be why a lot of people have had trouble with leaking heater valves. If it is
pressurized on the back side of the valve, that helps to close it and keep
it closed in the off position. I took mine apart and rebuilt it and that is
my opinion. Seems to me I have read that somewhere too.

Just FYI The pipes in the console tunnel actually cross over each other
before the exit at the heater.

Barry
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Tomas wrote:
It depends. You can hook either console tube to either end of the heater
core so the answer is depending on that.

Tomas

----- Original Message -----
From: "Mike Thomas" <mbefthomas at comcast.net>
To: <detomaso at realbig.com>
Sent: Tuesday, May 19, 2009 2:08 AM
Subject: [DeTomaso] 2 Questions - Water Pump Torque & Heater Hose Routing


> What if any are the torque specs for the water pump (aluminum)?   Mine
seems
> to require frequent tightening, so guessing I'm not torquing enough.
>
> And
>
> As they come out of the back of the console, which of the heater pipe
hoses
> runs to the water pump, and which to the block?
>
> Thanks
> Mike Thomas
>
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