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Leaking heater core

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tilleytr7
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Leaking heater core

Postby tilleytr7 » 13 Mar 2008 18:01

hello, i have a heater core that drips in a 1980 tr7 any suggestions on what to do, are there replacement cores avaible or should i just reconnect the hoses and bypass the heater core, help, thanks chuck.
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KRenken
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Postby KRenken » 13 Mar 2008 18:57

My experience is that repairing the leaky heater core the most economical solution...although getting the core out of the car is a tedious process. Are you certain it is the heater core that's leaking? Many times it is either the temperature control valve, or one of the short hoses attached to it that are the culprits.

Kimmit

1980 DHC
GM 3.8 v6 fi
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Beans
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Postby Beans » 13 Mar 2008 20:34

It's usually the connectionthat leaks, due to perished seals.
Just changed mine last weekend so some info on my weblog ...

http://tr7beans.blogspot.com/2008/03/slow-progress-on-heater-rebuild.html

http://tr7beans.blogspot.com/2008/03/changing-heater-day-1.html

http://tr7beans.blogspot.com/2008/03/changing-heater-day-2.html

http://tr7beans.blogspot.com/2008/03/changing-heater-day-3-and-preparations.html

<center>Image
<font color="blue"><i>1981 TR7 FHC Sprint (better known as 't Kreng)
1981 TR7 DHC (not very well known yet, but back on the road)
Also a 1980 TR7 DHC, 1980 TR7 DHC FI, 1981 TR7 FHC
http://tr7beans.blogspot.com/</i></font id="blue"></center>
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Beans
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Postby Beans » 14 Mar 2008 17:55

<blockquote id="quote"><font size="1" face="Century Gothic, Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by KRenken</i>

...the temperature control valve, or one of the short hoses attached to it <hr height="1" noshade id="quote"></font id="quote"></blockquote id="quote">
That's correct for the AC heater unit.
The normal heater unit doesn't have the temperature control valve. Temperature's controled by changing the amount of air flowing throught the heater matrix.
Also the connection of the coolant pipes/hoses to the heater matrix is different, no hoses under the dashboard.

Image

<center>Image
<font color="blue"><i>1981 TR7 FHC Sprint (better known as 't Kreng)
1981 TR7 DHC (not very well known yet, but back on the road)
Also a 1980 TR7 DHC, 1980 TR7 DHC FI, 1981 TR7 FHC
http://tr7beans.blogspot.com/</i></font id="blue"></center>
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