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SteveNMaine
Hey, has anyone restored the compressed shape of a 914 thermostat? The one I have has expanded and does not appear to have any leaks.

I have removed the solder on the threaded end which revealed a ball bearing. I removed the ball bearing and tested for leaks by compressing the unit and plugging the hole. It kept the semi-compressed shape for several hours and when I removed the plug, air rushed in and it expanded again.

Is there a way to restore it to its completely compressed shape at idle so-to-speak?
mepstein
Not really.
Krieger
Awesome powder coating makes brand new and correct ones for our car. A few years back I sent them an original one of my 914 they "restored". I believe they reused the ends of mine and replaced the center bellows and whatever gas is inside. It was almost the same cost as one of their new thermostats.
Jack Standz
I have not restored one. I think Hot VWs did an article on it years ago that you might find in their archives.

But, it looked tedious, so I've collected working ones from any junkyard motors over the years, including VW buses.
JeffBowlsby
https://www.awesomepowdercoat.com/
930cabman
I am probably in the minority here, but my recent (2 years ago) 2056 build I did not have a working t stat and thought I would try things out and see how it goes.

Well, it works great without the t stat. Warms up very quickly

so far as repairing the original, not sure if it's possible. AFAIK it is a sealed unit
914sgofast2
The originals can be repaired if the bellows does not have hairline cracks. But after 50+ years, good luck with that. The "magic" fluid used in the thermostats is simply denatured rubbing alcohol. I remember finding an article somewhere on how to fix them on either the 914World.com, PelicanParts.com, or on the Samba.com websites. You will need some good soldiering skills to do it properly. I found it easier to just buy a new thermostat from AwesomePowdercoat.com.
SteveNMaine
QUOTE(914sgofast2 @ Feb 9 2025, 09:32 PM) *

The originals can be repaired if the bellows does not have hairline cracks. But after 50+ years, good luck with that. The "magic" fluid used in the thermostats is simply denatured rubbing alcohol. I remember finding an article somewhere on how to fix them on either the 914World.com, PelicanParts.com, or on the Samba.com websites. You will need some good soldiering skills to do it properly. I found it easier to just buy a new thermostat from AwesomePowdercoat.com.


Yes, I found those restore/repair instructions as well. I am going to try to fix it before I order a new one.
ClayPerrine
And if you do use them, please check them to make sure they work. Having the flaps stay closed could potentially ruin your engine.

So with the flaps connected, use a heat gun to warm up the thermostat and make sure the flaps open up fully.


DC_neun_vierzehn
QUOTE(JeffBowlsby @ Feb 9 2025, 02:45 PM) *


I see a few parts for 914s, but I don’t see a thermostat.

https://www.awesomepowdercoat.com/type-iv-p...hermostat-parts
SteveNMaine
QUOTE(SteveNMaine @ Feb 9 2025, 07:26 AM) *

Hey, has anyone restored the compressed shape of a 914 thermostat? The one I have has expanded and does not appear to have any leaks.

I have removed the solder on the threaded end which revealed a ball bearing. I removed the ball bearing and tested for leaks by compressing the unit and plugging the hole. It kept the semi-compressed shape for several hours and when I removed the plug, air rushed in and it expanded again.

Is there a way to restore it to its completely compressed shape at idle so-to-speak?

I went through the procedure on www.ratwell.com/technical/Thermostats.html and it worked perfectly.
SteveNMaine
I was able to restore it.
brant
better to run a working thermostat than to leave it off entirely.
your motor... but the warm up difference does promote longevity of the motor.
rick 918-S
I repaired one. It worked but I would rather purchase a new one. I have purchased from Awesome Powder Coat. Great experience.
Puebloswatcop
I agree with Rick. I too repaired one once. The results were a bit disapointing. It worked but would never open the flaps completely. So it is worth the $144. at APC
SVG223
I've got one on the way from Awesome Powder Coat. I don't know how long it has been driven without one. It takes way too long to warm up without it.
Ron914
Has anyone purchased one of these yet .Almost $100 difference ?
Click to view attachment
Ron914
I now see what I missed
porschetub
QUOTE(Ron914 @ Dec 19 2025, 08:19 AM) *

I now see what I missed

Do you mean the one that AA sell ?, they say ( George ) that they have had no issues with them but they just say that about all sorts they sell so take that as you like ,these unit have no "failsafe" like the OEM one , if they fail the cooling flaps close and the result isn't nice .
Best to research as I did certainly not the best option to save $100 IMO.
cheers.
Root_Werks
QUOTE(rick 918-S @ Mar 30 2025, 07:04 AM) *

I repaired one. It worked but I would rather purchase a new one. I have purchased from Awesome Powder Coat. Great experience.

agree.gif

Bought a kit from them for my Bug and know a few T2 folks who've bought T-stats from them. All good quality stuff.
Ron914
QUOTE(porschetub @ Dec 18 2025, 07:11 PM) *

QUOTE(Ron914 @ Dec 19 2025, 08:19 AM) *

I now see what I missed

Do you mean the one that AA sell ?, they say ( George ) that they have had no issues with them but they just say that about all sorts they sell so take that as you like ,these unit have no "failsafe" like the OEM one , if they fail the cooling flaps close and the result isn't nice .
Best to research as I did certainly not the best option to save $100 IMO.
cheers.

I did . I thought they were offering the original bellows type for $52 but did not see it was actually closer to $200 in cost ,$52 was for a replacement type thermostat. Since I want OEM look I will be purchasing from AP .
914Wes
information on repairing thermostats can be found at https://www.ratwell.com/technical/Thermostats.html
Ron914
QUOTE(914Wes @ Dec 19 2025, 10:49 AM) *

information on repairing thermostats can be found at https://www.ratwell.com/technical/Thermostats.html

Interesting read . Thanks Wes . I think I will just buy a new one from Awesome .
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