Thermostat Choices in 2025

[Thom]

https://carpokes.com/viewtopic.php?t=966

[t36]

https://carpokes.com/viewtopic.php?t=966

Thanks! I’ll definitely test everything similarly after seeing this

[Latitude48]

I have a new Porsche thermostat 944 106 019 00 I purchased in 2022 for an eventual pump replacement. I'll dig it out and see where it's made, and if it has any temp markings.

Awesome! Appreciate that.
My recent purchase from Pelican indicates Made In Brazil and stamped 2022.
My local dealership is bringing one in as well to check. Maybe they have old stock.

I checked the thermostat I purchased from Porsche. It's stamped Made in Germany and is marked Wahler. On the small end it's marked 83 with a degree symbol.

[Tom]

I have a new Porsche thermostat 944 106 019 00 I purchased in 2022 for an eventual pump replacement. I'll dig it out and see where it's made, and if it has any temp markings.

Awesome! Appreciate that.
My recent purchase from Pelican indicates Made In Brazil and stamped 2022.
My local dealership is bringing one in as well to check. Maybe they have old stock.

I checked the thermostat I purchased from Porsche. It's stamped Made in Germany and is marked Wahler. On the small end it's marked 83 with a degree symbol.

I got a thermostat for my '79 450SL last year -- brand new in Mercedes packaging -- and it was marked "Made in W. Germany." (That said, it's my understanding the company that now owns Wahler makes parts in a number of countries, including Germany.)

[t36]

I have a new Porsche thermostat 944 106 019 00 I purchased in 2022 for an eventual pump replacement. I'll dig it out and see where it's made, and if it has any temp markings.

Awesome! Appreciate that.
My recent purchase from Pelican indicates Made In Brazil and stamped 2022.
My local dealership is bringing one in as well to check. Maybe they have old stock.

I checked the thermostat I purchased from Porsche. It's stamped Made in Germany and is marked Wahler. On the small end it's marked 83 with a degree symbol.

Interesting! My dealership brought one in and it’s made in Germany. Also built recently.
Sounds like 944 106 019 00 is made in Brazil and Germany simultaneously.

I’ll test the 4 thermostats I have and post the results !

[t36]

I tested two thermostats today.
Both of them are 944 106 019 00 (83 degree unit for updated water pump design).

One of them was a Wahler stamped "made in Germany". It was produced in 2020. The other, was a Wahler stamped "Made in Brazil" produced 2022.

The results are staggering.
1) The made in Germany Wahler (sourced from my dealership), opened just below 83 degrees. It opened proudly with lots of room for flow. As it cooled off, it stayed open for a longer temperature range.

2) The made in Brazil Wahler - was just barely open above 90 degrees. It closed up very shortly after it began cooling as well. Way too high a temperature and definitely didn't open enough for adequate flow.

Check your thermostats before installation.

The German made unit is on the left and can be seen open. The Made in Brazil unit on the right. Both in the same water, same temperature, same duration of time.

[Tom]

I tested two thermostats today.
Both of them are 944 106 019 00 (83 degree unit for updated water pump design).

One of them was a Wahler stamped "made in Germany". It was produced in 2020. The other, was a Wahler stamped "Made in Brazil" produced 2022.

The results are staggering.
1) The made in Germany Wahler (sourced from my dealership), opened just below 83 degrees. It opened proudly with lots of room for flow. As it cooled off, it stayed open for a longer temperature range.

2) The made in Brazil Wahler - was just barely open above 90 degrees. It closed up very shortly after it began cooling as well. Way too high a temperature and definitely didn't open enough for adequate flow.

Check your thermostats before installation.

The German made unit is on the left and can be seen open. The Made in Brazil unit on the right. Both in the same water, same temperature, same duration of time.

Thanks for posting this! It supports my fears about the 'new' Wahler units unfortunately. You can stamp Rolex on a Casio, but it's still a Casio. I'm hoping Porsche holds their suppliers to a standard, and that they wouldn't put a part like that in a PCNA box, though I suppose time will tell. Unless/until a new standard bearer emerges, I'll be testing like this before putting any t-stat in my car. Thanks again for the post!

[t36]

I tested two thermostats today.
Both of them are 944 106 019 00 (83 degree unit for updated water pump design).

One of them was a Wahler stamped "made in Germany". It was produced in 2020. The other, was a Wahler stamped "Made in Brazil" produced 2022.

The results are staggering.
1) The made in Germany Wahler (sourced from my dealership), opened just below 83 degrees. It opened proudly with lots of room for flow. As it cooled off, it stayed open for a longer temperature range.

2) The made in Brazil Wahler - was just barely open above 90 degrees. It closed up very shortly after it began cooling as well. Way too high a temperature and definitely didn't open enough for adequate flow.

Check your thermostats before installation.

The German made unit is on the left and can be seen open. The Made in Brazil unit on the right. Both in the same water, same temperature, same duration of time.

Thanks for posting this! It supports my fears about the 'new' Wahler units unfortunately. You can stamp Rolex on a Casio, but it's still a Casio. I'm hoping Porsche holds their suppliers to a standard, and that they wouldn't put a part like that in a PCNA box, though I suppose time will tell. Unless/until a new standard bearer emerges, I'll be testing like this before putting any t-stat in my car. Thanks again for the post!

Absolutely! Thank you! I might order another from the dealership to have as a backup.

[Tom]

I tested two thermostats today.
Both of them are 944 106 019 00 (83 degree unit for updated water pump design).

One of them was a Wahler stamped "made in Germany". It was produced in 2020. The other, was a Wahler stamped "Made in Brazil" produced 2022.

The results are staggering.
1) The made in Germany Wahler (sourced from my dealership), opened just below 83 degrees. It opened proudly with lots of room for flow. As it cooled off, it stayed open for a longer temperature range.

2) The made in Brazil Wahler - was just barely open above 90 degrees. It closed up very shortly after it began cooling as well. Way too high a temperature and definitely didn't open enough for adequate flow.

Check your thermostats before installation.

The German made unit is on the left and can be seen open. The Made in Brazil unit on the right. Both in the same water, same temperature, same duration of time.

Thanks for posting this! It supports my fears about the 'new' Wahler units unfortunately. You can stamp Rolex on a Casio, but it's still a Casio. I'm hoping Porsche holds their suppliers to a standard, and that they wouldn't put a part like that in a PCNA box, though I suppose time will tell. Unless/until a new standard bearer emerges, I'll be testing like this before putting any t-stat in my car. Thanks again for the post!

Absolutely! Thank you! I might order another from the dealership to have as a backup.

Was the one from the dealership in a Porsche box? That might suggest their quality standards are protecting them from the lesser parts....?

[t36]

Thanks for posting this! It supports my fears about the 'new' Wahler units unfortunately. You can stamp Rolex on a Casio, but it's still a Casio. I'm hoping Porsche holds their suppliers to a standard, and that they wouldn't put a part like that in a PCNA box, though I suppose time will tell. Unless/until a new standard bearer emerges, I'll be testing like this before putting any t-stat in my car. Thanks again for the post!

Absolutely! Thank you! I might order another from the dealership to have as a backup.

Was the one from the dealership in a Porsche box? That might suggest their quality standards are protecting them from the lesser parts....?

Just a Porsche bag. The classic sealed one. Clear on one side and white printed back with barcode.
I just got a front main seal from the dealership though. Definitely not putting it in my car. Ordered an Elring.
Also, the woodruff / feather key is the wrong size now ha ha. Definitely checked and it is the right part number for crank key. Photo of said seal and key.