1972 240Z Manifold Heat Control Thermostat

[Halvernaz]

Hi Guys,

Does anybody know where I can get a Manifold Heat Control Thermostat for my 1972 240Z.

There is an old topic that talked about buying a replacement from http://www.thermomegatech.com P/N P/N 213-000000-140. They don't seen to carry that part any more.

 

Thanks

[JSM]

Is the 73 the same? I have a 73 heater controls in my shed. 

[SteveJ]

22 minutes ago, JSM said:

Is the 73 the same? I have a 73 heater controls in my shed. 

The OP is looking for a part on the intake manifold. For more information, look here: 

 

 

[siteunseen]

Are you restoring and want the OE equipment?  I ran mine with a bad thermostat unknowingly.  Now I have deleted that coolant flow.  It doesn't get too cold here though.  I have a couple of old ones if you want one.  They're always open and flowing.  That's why I ditched them, cooler carbs now.

[JSM]

1 hour ago, SteveJ said:

The OP is looking for a part on the intake manifold. For more information, look here: 

 

 

Ah my bad. I recall seeing one of those kicking around somewhere too. 

[JSM]

Is this it? I have had it in that draw for so long it's yours free if you wish. No clue if it's any good. 

Edited December 10, 2017 by JSM

[siteunseen]

That's it.  I've got two also.  Bead blasting would make one look new but inop.

[Captain Obvious]

I wouldn't mind opening one of those up and poking around inside (if someone would send me one for autopsy).

I don't have a need, but have always been curious about them.

[Namerow]

48 minutes ago, Captain Obvious said:

I wouldn't mind opening one of those up and poking around inside

IIRC, it's just a typical spring-loaded, wax-pellet type check valve.  There's a cut-away drawing buried somewhere in the FSM.  While it is possible to screw off the end cap, it doesn't really show you too much of the inner workings (not that there's that ,much to see).  I think I soaked mine in a calcium-rust-lime-remover product overnight and then put it back together.  It worked OK before cleaning, and it worked equally OK after cleaning... so the cleaning was obviously an important step .  I suspect that the long-term health of these valves was directly related to whether the car's cooling system was run with plain tap water rather than coolant.

[Halvernaz]

Thanks everybody for all the info. I'm hoping to take JMS up on his offer to send me his used part, fingers crossed it still works.

If anyone comes up with a "new" replacement please let me know.

[siteunseen]

5 hours ago, Namerow said:

IIRC, it's just a typical spring-loaded, wax-pellet type check valve.  There's a cut-away drawing buried somewhere in the FSM.  While it is possible to screw off the end cap, it doesn't really show you too much of the inner workings (not that there's that ,much to see).  I think I soaked mine in a calcium-rust-lime-remover product overnight and then put it back together.  It worked OK before cleaning, and it worked equally OK after cleaning... so the cleaning was obviously an important step .  I suspect that the long-term health of these valves was directly related to whether the car's cooling system was run with plain tap water rather than coolant.

Did you get to the inside?  I can't figure out how to remove the brass part.  I can jab a screwdriver into the inlet and feel  pretty tight spring that is against that brass end.  

Maybe I should just donate it to Dr Frunkenstein's layboreatori.

Edited December 10, 2017 by siteunseen

[siteunseen]

My eyes are going...

I blow it up on my phone and see that's a small nut on a threaded post under all that crud. I'll wire brush that and see if I can break the nut loose.

Edited December 10, 2017 by siteunseen