replace all of these together
Thread Starter
Senior Member
Joined: Apr 2014
Posts: 332
Likes: 70
2007 GL450
replace all of these together
If your GL450 is due for its first thermostat replacement (in my case 107 k miles), and the following parts have not been replaced, replace them together to save on the labor.
belt drive & cooling system:
thermostat
coolant reservoir
upper coolant hose
idler 1 & 2
tensioner
belt
the following items could be or will soon be leaking:
engine oil filter housing seal
engine oil cooler seal
steering fluid reservoir & o ring
cam position sensor (4 of them) due to oil leaking around them.
I learned this in the hard way. take me four trips to replace them. and each time have to remove the cover, radiator fan box, and the thermostat has to be removed and installed 3 times.
should have replaced all of them in one operation if I knew this earlier.
belt drive & cooling system:
thermostat
coolant reservoir
upper coolant hose
idler 1 & 2
tensioner
belt
the following items could be or will soon be leaking:
engine oil filter housing seal
engine oil cooler seal
steering fluid reservoir & o ring
cam position sensor (4 of them) due to oil leaking around them.
I learned this in the hard way. take me four trips to replace them. and each time have to remove the cover, radiator fan box, and the thermostat has to be removed and installed 3 times.
should have replaced all of them in one operation if I knew this earlier.
MBWorld Fanatic!
Joined: Jun 2010
Posts: 2,762
Likes: 630
From: Emmett, ID, USA
2007 GL450
If your GL450 is due for its first thermostat replacement (in my case 107 k miles), and the following parts have not been replaced, replace them together to save on the labor.
belt drive & cooling system:
thermostat
coolant reservoir
upper coolant hose
idler 1 & 2
tensioner
belt
the following items could be or will soon be leaking:
engine oil filter housing seal
engine oil cooler seal
steering fluid reservoir & o ring
cam position sensor (4 of them) due to oil leaking around them.
I learned this in the hard way. take me four trips to replace them. and each time have to remove the cover, radiator fan box, and the thermostat has to be removed and installed 3 times.
should have replaced all of them in one operation if I knew this earlier.
belt drive & cooling system:
thermostat
coolant reservoir
upper coolant hose
idler 1 & 2
tensioner
belt
the following items could be or will soon be leaking:
engine oil filter housing seal
engine oil cooler seal
steering fluid reservoir & o ring
cam position sensor (4 of them) due to oil leaking around them.
I learned this in the hard way. take me four trips to replace them. and each time have to remove the cover, radiator fan box, and the thermostat has to be removed and installed 3 times.
should have replaced all of them in one operation if I knew this earlier.
thermostat
coolant reservoir
upper coolant hose
idler 1 & 2
tensioner
belt
steering fluid reservoir & o ring
cam position sensor (4 of them) due to oil leaking around them. (kinda surprised to hear these are all leaking; you know the sensor, which is small, and the adjuster magnet, which is big, are two different things)
engine oil filter housing seal (independent of other work unless I am missing something)
engine oil cooler seal (you have an oil cooler?)
MBWorld Fanatic!
Joined: Jun 2014
Posts: 1,086
Likes: 443
From: Melbourne, Australia
2010 ML550 VIN WDC1641722A564750, 2010 B180
I would group them like this, assuming you do not care to do them all at once:
thermostat
coolant reservoir
upper coolant hose
idler 1 & 2
tensioner
belt
steering fluid reservoir & o ring
cam position sensor (4 of them) due to oil leaking around them. (kinda surprised to hear these are all leaking; you know the sensor, which is small, and the adjuster magnet, which is big, are two different things)
engine oil filter housing seal (independent of other work unless I am missing something)
engine oil cooler seal (you have an oil cooler?)
thermostat
coolant reservoir
upper coolant hose
idler 1 & 2
tensioner
belt
steering fluid reservoir & o ring
cam position sensor (4 of them) due to oil leaking around them. (kinda surprised to hear these are all leaking; you know the sensor, which is small, and the adjuster magnet, which is big, are two different things)
engine oil filter housing seal (independent of other work unless I am missing something)
engine oil cooler seal (you have an oil cooler?)
