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

[Tomas Gunnarsson]

Barry,

I think my car had the same feature of crossing the tubes inside the console that you describe. I also disassembled my valve and made sure that it was self sealing with water flow. I have not had to use the shut off valves to combat heater valve seepage since. I wrote about it to the list a while back.

Tomas

----- Original Message ----- 
From: "Barry Seib" <oldwheel at mts.net>
To: "DetomasoList" <detomaso at realbig.com>; <mbefthomas at comcast.net>; <guson at home.se>
Sent: Tuesday, May 19, 2009 10:13 PM
Subject: [DeTomaso] 2 Questions - Water Pump Torque & Heater Hose Routing


> 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
> ----------------------------------------------------------------------------
> ------------------------------------
> 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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