Spades Posted March 21, 2010 Report Share Posted March 21, 2010 I put new O-rings in my '72 Datsun 510 wagon's heater control valve, but if the heater is switched off, it drips slightly over the course of a few days. I have been waiting to order a carpet kit and put it in until I figure out what to do about the leak. I have been unable to find a heater control valve from any of our parts suppliers, does anyone know where to find one? Eventually I want a carpet kit, and it would be nice to be able to shut the heater off during summer months. Quote Link to comment
rpowell25 Posted March 21, 2010 Report Share Posted March 21, 2010 I bought one from here: http://www.new-datsun-parts.com/datsun-510-parts-interiorl.html Little pricey but I needed it. Robert Powell Quote Link to comment
datzenmike Posted March 21, 2010 Report Share Posted March 21, 2010 Here's the control valve for my 720 heater. It just sits in line and is activated be the lever shown: No one will see it and it's a Nissan part. :D . 1 Quote Link to comment
Spades Posted March 21, 2010 Author Report Share Posted March 21, 2010 yeah, I already barked up the universal tree...there isn't much room under the dash, because of where the opening is for the exit of the hose, the valve has to be a pretty specific shape... I will have to figure something else out, because $105 for what is normally a $15 part is too rich for my blood. Quote Link to comment
qwik510 Posted March 21, 2010 Report Share Posted March 21, 2010 yeah, I already barked up the universal tree...there isn't much room under the dash, because of where the opening is for the exit of the hose, the valve has to be a pretty specific shape... I will have to figure something else out, because $105 for what is normally a $15 part is too rich for my blood. THe newest issue of the Dime Quarterly had a great article on rebuilding your heater box that included using a redliy available valve from another Datsun. Quote Link to comment
five10freak Posted March 22, 2010 Report Share Posted March 22, 2010 i rebuilt my heater a few years ago. i used a heater switch from a 70's 620, part # 27017-B5000, if i remember it was at or under $20.00, it does take some work though, as it is not drop in replacement, rather a valve that that you take apart and used what you need to repair you're original valve,it is a pain in the ass but the end result is worth it. here is the site and person who inspired me to do it,and there is full pic's there to follow. julie coop 1 Quote Link to comment
Spades Posted March 22, 2010 Author Report Share Posted March 22, 2010 i rebuilt my heater a few years ago. i used a heater switch from a 70's 620, part # 27017-B5000, if i remember it was at or under $20.00, it does take some work though, as it is not drop in replacement, rather a valve that that you take apart and used what you need to repair you're original valve,it is a pain in the ass but the end result is worth it. here is the site and person who inspired me to do it,and there is full pic's there to follow. julie coop already tried to repair it...dis assembled it, cleaned it, and put new o-rings in it....no dice, still leaks. I will look into that dime quarterly article... Quote Link to comment
jun Posted March 22, 2010 Report Share Posted March 22, 2010 You can try replacing the "smaller" O-ring inside the valve with 2 small 3mm O-rings. That's what I did, and it works perfect. Mine were nitrile as well, might have made a difference. 1 Quote Link to comment
benzo Posted March 22, 2010 Report Share Posted March 22, 2010 I used the 620 heater valve and disected it like on juliecoop turorial and when i put back together I used a little vaseline on the o rings and then i made sure I bent the tabs back securely and then put back together and tested it by running water into the core and capping off the ends and letting sit for a while to look for leaks that way I would not waste my time when putting back in. I would just take back out and rebuild again. make sure you clean the copper well as pits or debris or out of roundness can make for bad sealing. I have looked for new valves for a long time and could never find them not even when i go to japan. datsun used many different style for heater control valves. Quote Link to comment
motavated Posted March 22, 2010 Report Share Posted March 22, 2010 i bought the last 620 one.... Well the computer said there was one left.... Hopefully I get it... Quote Link to comment
benzo Posted March 22, 2010 Report Share Posted March 22, 2010 try contacting riley at lynchburg nissan he may have some still or should be able to get more Quote Link to comment
Spades Posted March 28, 2010 Author Report Share Posted March 28, 2010 Well, I was able to repair the heater valve...now that it holds pressure I found another problem when I shut the heat off...my heater core leaks now, LOL. So, guess I will be pulling the heater core out and hopefully I can braze or solder whatever is leaking. Quote Link to comment
slowlearner Posted July 9, 2019 Report Share Posted July 9, 2019 Digging up a Zombie thread... I think I have, wait for it, TWO heater cores with seized valves. Would this suffice? It's cheap and cheerful here down under... https://www.ebay.com.au/itm/Heater-Control-Valve-C3UZ18495A-YG133-For-FORD-E-F-SERIES-BRONCO-DODGE-VAN-FK/323725787758?epid=23024241000&hash=item4b5f8f826e:g:y3AAAOSwBUtcgQF5 Quote Link to comment
Crashtd420 Posted July 9, 2019 Report Share Posted July 9, 2019 6 hours ago, slowlearner said: Digging up a Zombie thread... I think I have, wait for it, TWO heater cores with seized valves. Would this suffice? It's cheap and cheerful here down under... https://www.ebay.com.au/itm/Heater-Control-Valve-C3UZ18495A-YG133-For-FORD-E-F-SERIES-BRONCO-DODGE-VAN-FK/323725787758?epid=23024241000&hash=item4b5f8f826e:g:y3AAAOSwBUtcgQF5 I used one like that on my 521.... my heater core has a penny where the valve should be.... It will work, my problem now is I broke the cable I used to actuate it, so get a good cable.... I used a choke cable but the crimp near the knob let go, so I can open it but not close it.... 1 Quote Link to comment
G8KeaPoR Posted July 11, 2019 Report Share Posted July 11, 2019 So spiritgarage.com has no’s if you can read Japanese, datsun1200.asia has them too. Another alternative would be to find one from a Toyota starlet kp61. 1981 is a good year. It plastic but similar enough you could retro it. I have one on my starlet but to be honest it has sat for 15 years un used and open without a hood so I doubt it would work as it’s pretty faded and getting chalky but I know yoga used the same control valve on a ton of cars. Quote Link to comment
datzenmike Posted July 11, 2019 Report Share Posted July 11, 2019 This is the simple inline on off plastic valve used on the 720. Quote Link to comment
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