GLS Class (X167) Produced 2020 to present

2017 GLS450 - Thermostat housing

Old Aug 18, 2024 | 07:30 AM
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2017 GLS450
2017 GLS450 - Thermostat housing

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?



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Old Aug 18, 2024 | 07:45 AM
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2017 GLE350 4MATIC
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.
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Old Aug 22, 2024 | 08:04 AM
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2017 GLS450
Update

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.
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Old Aug 23, 2024 | 01:40 PM
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X167 GLS450 W113 280SL W463.227 300GE
Hi - you may want to post this request n the X166 forum - this forum is for the subsequent generation X167 model.
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