Just had an overheat and hose blow. Water pump failed. Replaced water pump and hose and now about to swap the entire thermostat housing as it sounds like there is a lot of air passing right where fluid would enter engine block. Any tips on changing the entire housing?

 

Sorry to hear. The resident expert on the M276 3.0TT is @S-Prihadi

Have a look in the W212 section where there is a strong DIY crew and this engine was used on that platform.

 

Got a new thermostat housing. Was able to remove wiring harness and charge air unit in order to remove the entire thermostat housing. Once removed found a whole new problem which is why I was hearing the air me tioned in previous post. Pic below:

This piece where red arrow points to is in between the upper covers? It is rubber. Am trying to figure out what this piece is called and a pat number and how to swap it out.

Any help greatly appreciated.

 

Hi - you may want to post this request n the X166 forum - this forum is for the subsequent generation X167 model.