whats the part # for the thermostat that goes inside the air cleaner to make the flap close. my flap never closes when its cold but if i plug the vacuum line into the top of the stove pipe it works. nobody at autozone knows what im talking about.
btw its a 73 valaint. thanks

Mopar parts manual calls it a sensor, P/N 3514 168. Same part used on all 73 engines.

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You can't fix stupid. - Ron White

Hi dr.gonzo87, and welcome to the forum.

The gizmo is called a 'Air Cleaner Temperature Sensor', or 'Air Cleaner Temp Sensor' (napa) or 'Air Temperature Sensor' (rockauto), and maybe other things by other suppliers.

You can click on the red text to follow the links to some sensors, if it isn't one of them you can google it yourself for more results.

napaonline.com

for 1973

eBay.com

Olaf.

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Aspenized

No longer serviced in the aftermarket. I think I have some new old stock air cleaner temperature sensors remaining; if you don't find one locally, send me a PM and I'll see about boxing one up for you.

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一期一会
Too many people who were born on third base actually believe they've hit a triple.

Sorry, the 'for 1973' was a bad link. Napa's part number for the sensor is 'CRB 22252'.

Olaf.

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Aspenized

i also am looking for this part I looked on the napa site and looks likt they have a bunch but not sure which would be correct for 80 d150 pickup as they don't show a air cleaner temp sensor for it in their search.

and they expect us to keep these things with original smog equipment and pass test. I can't wait till I have to search for mini ox converter aka "front cat on my d150" thats going to be fun stuff I guess thats what I get for living in california the worst of all smog law wise.

Those are the numbers I found, I think the eBay source is still active.

I don't know these parts in detail over the years, but all they do is open or shut the passage of vacuum, dependent on a certain temperature interval of the air in the air cleaner housing. I have a feeling that the main difference between the part numbers of those which otherwise look the same, is if they open or close at a certain temp level, and the number of degrees at which they open/close. A few degrees up or down cannot matter very much. The main thing is that it lets vacuum through at low temps to open the flap for hot air, and keeps it closed at higher temps. The vacuum source also sees to that, full throttle equals no/low manifold vacuum, and then the flap closes for hot air in any case!

I guess that newer cars also have some kind of sensor to deal with this, and that must surely be possible to adapt to our cars.

Olaf.

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Aspenized

yeah thats what I was thinking a few degrees won't make too much difference better that the system works than not at all

New cars don't need that vacc. sensor they use an electronic one that tells the computer the manifold air temp, if they need to run cold the Computer flares the injectors a bit richer until temp comes up, and the computer will also engage the A/C compressor to provide some extra "work" for the engine during warm up....

I remember being on a search for these a while back, I got the last 3 carquest had in the PacNW...

-D.Idiot