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Heater core question

Subject: Heater core question
From: Don Spence <>
Date: Tue, 31 May 2005 11:33:46 -0600
Looking at the diagram in the TR4A spare pars catalogue ( same heater) 
it would seem that the longer pipe , is at the top and is the return 
port on the rad. Inlet is definitely the bottom. As far as function is 
concerned it wouldn't matter . The direction of water through and air 
across the core would be reversed but it's just a heater core. The real 
difference would be in how the hoses lined up in cramped quarters. The 
pic definitely shows longer at the top
On Tuesday, May 31, 2005, at 09:44  AM, daily 
digest wrote:

> From:
> Subject: Heater core question
> I have asked this question once before but have not gotten an answer.I 
> am doing a frame off restoration of my 1971 TR6. I am rebuilding the 
> heater unit and am concerned about the correct orientation of the 
> heater core. The core is rectangular in shape with openings for the 
> hoses coming out the side. One of these side pipes is longer than the 
> other. Which goes on top. The only reference to this comes from a 
> diagram in the rimmer catalogue which seems to show the longer on top. 
> Does anypone no for sure,I would hate to install it incorrectly and 
> find out after the new dash has been installed.
>                      Art

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