What do ya think? Tstat? - PeachParts Mercedes-Benz Forum

300dmichael · #1 01-17-2009, 01:30 PM

In your picture of the t stat housing, I see what looks like the remnants of a paper gasket around the housing..if that is what there is ,was there a rubber gasket that fits around the t stat it self..If you are trying to seal the housing with a paper gasket and the t stat has no rubber ring on it like my picture, then the t stat will let coolant by it and the car will never warm up.

imagesinthewind · #2 01-17-2009, 01:38 PM

Quote:

Originally Posted by 300dmichael

In your picture of the t stat housing, I see what looks like the remnants of a paper gasket around the housing..if that is what there is ,was there a rubber gasket that fits around the t stat it self..If you are trying to seal the housing with a paper gasket and the t stat has no rubber ring on it like my picture, then the t stat will let coolant by it and the car will never warm up.

Thanks.
Ihave the rubber gasket around the tstat itself. It's on nice and snug and fits nice and snug into the housing. Don't know why it's leaking. Is there also
a gasket that goes around the housing? I've never seen one and changed the tstat on three MBs so far.

The photo is actually from the parts car. I just didn't feel like opening my hood (walking across all the ice in my driveway) and the parts car hood is open forever (robbed of it's latch cable).

I just wanted to know what the 'thingy' (it's an industry term) was on the housing. The wire goes down and back to something with a motor and fan.

Thanks,
Ginny
(sad and angry that the time I took to 'fix' things yesterday did NOTHING)

300dmichael · #3 01-17-2009, 02:31 PM

There is not suppose to be a paper gasket on it at all..the rubber o ring that fits on the t stat is what seals the housing together..Is the engine getting hot at all?? If you drove around for 20 minutes and brought home ,opened the hood and put your hand on the top large radiator hose,would it be hot?? If the hose is just warm,were you are not un confortable holding it.,.then there is a need for a new t stat..that hose should be HOT..that hose should be about 180 degrees hot and that is hot enough to burn you after a few seconds. but if it is just warm,then your gauge doesnt really start reading till it gets about 120 and that is what you are saying about the problem with your gauge..

I just replaced a tstat on my 83 300d and it was not stuck open,but it always ran cold..it just simple opened too soon..new t stat and everything changed..it now runs about 185..