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Tips on rebuilding heater valve, please?

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Tips on rebuilding heater valve, please? #1
szcz202 Michael Szczepanski Santa Fe, NM, USA Sign in to contact 1977 MG Midget 1500	Topic Creator (OP) Mar 24, 2017 05:16 PM Joined 7 years ago 33 Posts

Hi all, I filled the system with coolant and a steady dribble flowed out of the heater valve. I had replaced the seal between the halves and used gasket maker as insurance. I've read in other posts that there's an o-ring somewhere but I can't find it and am not sure how to remove the rotating shaft that forms the valve. Any tips? How to I get this thing apart to reseal it?
Thanks!!

valve - 1.jpg 44.9 KB

valve - 2.jpg 39.2 KB

valve - 3.jpg 27.1 KB

valve - 4.jpg 32.7 KB

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Re: Tips on rebuilding heater valve, please? #2
szcz202 Michael Szczepanski Santa Fe, NM, USA Sign in to contact 1977 MG Midget 1500	Topic Creator (OP) Mar 24, 2017 05:26 PM Joined 7 years ago 33 Posts

LOL - reviewing my pics I could see the circle of gasket maker covering the screw that allows me to remove the shaft. Doh!
One question remains - VB says I need two of the gaskets that go between the halves. Why 2?

valve - 1 (1).jpg 49 KB

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Re: Tips on rebuilding heater valve, please? #3
76lucas Josh L Christiansburg, VA, USA Sign in to contact 1978 MG Midget 1500 1979 MG Midget 1500 "Blue "parts" Car" 2013 Toyota Camry "Boring Daily"	Mar 24, 2017 08:23 PM Joined 8 years ago 1,892 Posts

Because if you look at the Moss site it shows the mounting bracket goes between the two pieces of the heater valve. Not sure if that is right or not but since most suppliers buy their stock from Moss they tend to follow what Moss says about how many are needed.

If you never try to do it You will never be able to do it

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Re: Tips on rebuilding heater valve, please? #4
Richb Richard Ball Everett, Wa, USA Sign in to contact 1976 MG Midget 1500	Mar 24, 2017 11:18 PM Joined 12 years ago 436 Posts

I have rebuilt a couple of these and usually just use one gasket between the valve and the flange pipe. You'll want to find a size 014 O-ring as a replacement. I put a little grease on it to help seal and wear longer. I usually use Mercruzer outdrive grease, but plumber grease should work also. If you dropped into a marine/boat repair shop i'm sure they would give you a dab for the O-ring.

Rich Ball
'76 Midget
Everett, WA

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