+1I would be curious to see a test and autopsy on the removed unit. Good luck!
MMS,I sell the oem thermostat on my website:
I also have a video discussing the thermostat and a tip on how to remove it on my Instagram and Facebook.
On my Facebook page it's the video entitled "Why pay more for the same product?"
I currently have over 70 videos and add more every week!
What spec coolant are you using?Last year when I changed the thermostat I examined the old one, the internal rubber seal and adjacent metal face that it seals on where all in good condition. The only explanation I have for the previous failure is that the spring was not holding the seal tight against the face. Presumably, as it is the only spring in the assembly, this spring modulates with temperature, my guess is that it loses temper and eventually stops holding tight and allows a certain amount of coolant to slip by. This would explaing the slow but eventual heat up and the slightly low final temp. When I get a new one I will try to analyze the spring tension of the new against the old.
I’m thinking that maybe a generic thermostat was put in a Mahle box, there are no actual indications on the thermostat housing as to its origin.
The eBay seller certainly refunded me my $ very quickly, no questions asked.
Next, who has replaced a thermostat and had reliable results and what brand/merchant was it?