Re: [AMC-list] 195.6 ohv heater, valve, and mystery solved

[Wrambler <wrambler242@xxxxxxxxxxx>]

That is just plain interesting!
Realy strange, How about putting a cable clamp block on the valve end of the cable to limit pull?

My other thought, You NEED a heater out there?
What, did it get down into the 50's?  :-O  roflol...

Mark Price
Morgantown, WV 26508
1969 AMC Rambler, 4.0L, EFI, T-5
2004 Grand Cherokee Laredo, 4.7L, Quadratrac II
"I realize that death is inevitable.
I just don't want to be around when it happens!"

----- "tom jennings" <tomj@xxxxxxx> wrote:

> From: "tom jennings" <tomj@xxxxxxx>
> To: "Rambler AMC, Nash, Jeep and family" <amc-list@xxxxxxxxxxxx>
> Sent: Friday, November 20, 2009 9:06:00 PM GMT -05:00 US/Canada Eastern
> Subject: [AMC-list] 195.6 ohv heater, valve, and mystery solved
>
> Last night driving home I figured out the source to a Great Mystery in
> my
> American... the symptom that led to figuring it out was, if I pull
> the
> heater valve all the way out (full ON) the car... overheats?!
> 
> A few months back I had a radiator top-tank leak; I removed and
> resoldered
> it in place (turns out had a chunk of crud under the neck so it
> couldn't sit
> flat so the thick solder seam eventually cracked and leaked). Easy
> fix. But
> when I re-filled it, cold, idling in my work spot, I felt the head get
> hot,
> but the thermostat wouldn't open, and I got boiling in the head! WTF!
> Turned
> the car off, the guage read HOT, I let it sit, the thermostat
> eventually
> opened, it sucked in a bunch of water and then was OK. Very strange.
> Did
> this two separate times!
> 
> I'll spare you the rest of the details -- here's what the root cause
> was.
> 
> ** When I flushed and refilled the radiator, I did so with the heater
> valve
> open. Of course. Well... as anyone with this engine knows, the heater
> water
> control valve gets rotten after 40+ years (not even half a century?!
> must be
> a quality problem). Being too cheap to spring for NOS I put in a pipe
> nipple
> and used a nice, modern replacement valve from NAPA. Fits and works
> great.
> The heater core died also, long ago, so I fit a nice Ford Econoline
> heater
> core in. That works great also, took a small mod to the heater box to
> fit
> it.
> 
> Well the heater system diverts water from the water pump to the back
> of the
> head -- and with the new valve (bigger bore) and new heater core
> (likely
> higher flow) it can actually bypass enough water to short-circuit the
> radiator!
> 
> D'OH!
> 
> I will consider a restrictor for the heater hose, but for now, simply
> not
> pull the valve out all the way. I might be able to simpyl adjust the
> wire
> pull, but the strokes etc are such that I think that won't work.
> -------------- next part --------------
> An HTML attachment was scrubbed...
> URL:
> <http://list.amc-list.com/pipermail/amc-list-amc-list.com/attachments/20091120/92d21544/attachment.htm>
> _______________________________________________
> AMC-list mailing list
> AMC-list@xxxxxxxxxxxx
> http://list.amc-list.com/listinfo.cgi/amc-list-amc-list.com
_______________________________________________
AMC-list mailing list
AMC-list@xxxxxxxxxxxx
http://list.amc-list.com/listinfo.cgi/amc-list-amc-list.com