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Re: Heater Hose Routing

To: <mgb-v8@autox.team.net>, <trichels@sbcglobal.net>
Subject: Re: Heater Hose Routing
From: match@ece.utah.edu
Date: Fri, 08 Apr 2005 21:51:34 -0600
In-reply-to: <000c01c53caf$39f49200$25d9fea9@sbcglobal.net>
Reply-to: match@ece.utah.edu
Sender: owner-mgb-v8@autox.team.net
On 8 Apr 2005 at 21:52, trichels@sbcglobal.net wrote:

> I have a 1977 MGB with a Buick 300 engine.  For the time being, I do not plan
> to install the heater core and am wondering if it is O.K. to just route the
> hose from the water pump to the rear of the intake manifold.  Will this cause
> a problem with the water circulation?

Don't do it. If you had a heater core and the heater were turned off, then the 
heater 
valve would be closed. So, no heater, block off both heater hose connections. 
Or 
install a heater valve and close it.

>  I seem to have an overheating problem
> which appears to be caused mainly by inadequate air flow.  I'm working on that
> but began wondering if somehow the location of the heater hose was allowing
> water to just recirculate without passing through the radiator.

Hmm... let's see... here's the normal path for coolant: the water pump draws   
coolant from the radiator and pumps it into the block. The coolant travels 
first 
through the block, then through the heads, then into the intake manifold, then 
back 
to the radiator.

So if you connect the heater outlet to the heater inlet in the manner you 
describe, 
then all you are doing is wasting some of your water pump capacity to move 
coolant 
from the radiator back to the radiator. That portion of the coolant never goes 
through 
the block and heads to cool them, so the engine gets no benefit from it.
> 
> Would appreciate any thoughts on this,
> 
> Doug Trichel

Those are my thoughts...

Marvin Match

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