Water Pump
MBWorld Fanatic!
Joined: Aug 2003
Posts: 8,882
Likes: 1,214
From: In my garage
E55, GLS450, GL63, GLE350
Haven't heard of any water pumps going out on this engine. The replacement may not be as good as the original so be careful. Typically, when MB parts break and or fail, they will all fail. The one really great thing about MB ownership and buying used is their consistency. Sometimes that can be seen as good or bad depending on who's paying for the repair. Either way, if there was a problem, you would be reading about it by now.
Take the emissions compliant OM642. It was very obvious early on the engine was problematic. Now, a decade later, MB is paying billions for repairs and maintenance of the emission equipped vehicles. However, if it were only emissions, they wouldn't have to pay for almost all of the engine repairs due to the multiple weak/failure points on the engine. The lawsuit clearly spells out that just about all engine components are covered. Great for current owners while previous owners, far too often, spent huge sums of money repairing and maintaining the vehicles.
Not saying the bi-turbo engines in the GL don't have issues because they do. Serious ones at that but have not heard about it being the water pump.
Take the emissions compliant OM642. It was very obvious early on the engine was problematic. Now, a decade later, MB is paying billions for repairs and maintenance of the emission equipped vehicles. However, if it were only emissions, they wouldn't have to pay for almost all of the engine repairs due to the multiple weak/failure points on the engine. The lawsuit clearly spells out that just about all engine components are covered. Great for current owners while previous owners, far too often, spent huge sums of money repairing and maintaining the vehicles.
Not saying the bi-turbo engines in the GL don't have issues because they do. Serious ones at that but have not heard about it being the water pump.
Last edited by BlownV8; Oct 28, 2021 at 12:08 PM.
Thread Starter
Member
Joined: May 2021
Posts: 154
Likes: 29
From: The Great State of Texas
GL450
Thanks man, just got off the phone with Mercedes of Houston and a Mechanic there said not to change it if it isn't leaking or otherwise shows damaged.
I have to admit your comment about lawsuits, serious engine concerns and otherwise problematic issues about this engine/car has me concerned. We are new owners of a Mercedes and could not be happier with it. The style, the comfort, the performance the roomy'ness of the car is phenomenal. The things you mentioned is the first I have heard about the car.
We bought it because I can turn wrenches on it if needed, I don't mind getting dirty and actually enjoy it. Although these turbo coolant lines look like an SOB to replace, I've even contemplated removing the engine just to make easier!
Chad
I have to admit your comment about lawsuits, serious engine concerns and otherwise problematic issues about this engine/car has me concerned. We are new owners of a Mercedes and could not be happier with it. The style, the comfort, the performance the roomy'ness of the car is phenomenal. The things you mentioned is the first I have heard about the car.
We bought it because I can turn wrenches on it if needed, I don't mind getting dirty and actually enjoy it. Although these turbo coolant lines look like an SOB to replace, I've even contemplated removing the engine just to make easier!
Chad
Thread Starter
Member
Joined: May 2021
Posts: 154
Likes: 29
From: The Great State of Texas
GL450
What?
Dude, I'm not sure where you got that from but it sure as HELL wasn't from me!
Your Quote: "Take the emissions compliant OM642. It was very obvious early on the engine was problematic. Now, a decade later, MB is paying billions for repairs and maintenance of the emission equipped vehicles. However, if it were only emissions, they wouldn't have to pay for almost all of the engine repairs due to the multiple weak/failure points on the engine. The lawsuit clearly spells out that just about all engine components are covered. Great for current owners while previous owners, far too often, spent huge sums of money repairing and maintaining the vehicles.
Not saying the bi-turbo engines in the GL don't have issues because they do. Serious ones at that but have not heard about it being the water pump.
My Quote: "I have to admit your comment about lawsuits, serious engine concerns and otherwise problematic issues about this engine/car has me concerned"
If you took my reply as I meant MY CAR then you read way to deep in to it. I was referring to the Engines in ALL of the GL450 Class SUV's, not just my particular engine. You said the bi-turbo engines in the GL have some serious issues; "not saying the bi-turbo engines in the GL don't have issues because they do. Serious ones at that". I was asking what those issues were?
Is it the Turbo, the heads, the block, the rotating assembly, the fuel system, HVAC, Suspension, Exhaust, Paint, Stereo, Interior, Exterior or something else? That was my question, sorry you took it the wrong way or I mislead you. Thanks man, cheers!
Chad
Dude, I'm not sure where you got that from but it sure as HELL wasn't from me!
Your Quote: "Take the emissions compliant OM642. It was very obvious early on the engine was problematic. Now, a decade later, MB is paying billions for repairs and maintenance of the emission equipped vehicles. However, if it were only emissions, they wouldn't have to pay for almost all of the engine repairs due to the multiple weak/failure points on the engine. The lawsuit clearly spells out that just about all engine components are covered. Great for current owners while previous owners, far too often, spent huge sums of money repairing and maintaining the vehicles.
Not saying the bi-turbo engines in the GL don't have issues because they do. Serious ones at that but have not heard about it being the water pump.
My Quote: "I have to admit your comment about lawsuits, serious engine concerns and otherwise problematic issues about this engine/car has me concerned"
If you took my reply as I meant MY CAR then you read way to deep in to it. I was referring to the Engines in ALL of the GL450 Class SUV's, not just my particular engine. You said the bi-turbo engines in the GL have some serious issues; "not saying the bi-turbo engines in the GL don't have issues because they do. Serious ones at that". I was asking what those issues were?
Is it the Turbo, the heads, the block, the rotating assembly, the fuel system, HVAC, Suspension, Exhaust, Paint, Stereo, Interior, Exterior or something else? That was my question, sorry you took it the wrong way or I mislead you. Thanks man, cheers!
Chad
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MBWorld Fanatic!
Joined: Aug 2003
Posts: 8,882
Likes: 1,214
From: In my garage
E55, GLS450, GL63, GLE350
What?
Dude, I'm not sure where you got that from but it sure as HELL wasn't from me!
THIS:
My Quote: "I have to admit your comment about lawsuits, serious engine concerns and otherwise problematic issues about this engine/car has me concerned"
Is it the Turbo, the heads, the block, the rotating assembly, the fuel system, HVAC, Suspension, Exhaust, Paint, Stereo, Interior, Exterior or something else? That was my question, sorry you took it the wrong way or I mislead you. Thanks man, cheers!
Chad
Dude, I'm not sure where you got that from but it sure as HELL wasn't from me!
THIS:
My Quote: "I have to admit your comment about lawsuits, serious engine concerns and otherwise problematic issues about this engine/car has me concerned"
Is it the Turbo, the heads, the block, the rotating assembly, the fuel system, HVAC, Suspension, Exhaust, Paint, Stereo, Interior, Exterior or something else? That was my question, sorry you took it the wrong way or I mislead you. Thanks man, cheers!
Chad
Thread Starter
Member
Joined: May 2021
Posts: 154
Likes: 29
From: The Great State of Texas
GL450
Thanks man, like I said we love the car and I hope I can fix whatever comes up. Your are 100% correct on the coolant pipes, can't believe they made them out of plastic. They are garbage, I touched one, breathed on one and looked at another and they all broke!! Damm, talk about fragile!!
Happy Halloween man!!
Chad
Happy Halloween man!!
Chad
Thread Starter
Member
Joined: May 2021
Posts: 154
Likes: 29
From: The Great State of Texas
GL450
Thanks Gents!
I think I will change the belt, I didn't see any documentation from the Previous Owner or Dealer that it was ever changed. I see the plugs were changed at 64K so I don't see a reason to change them at 80K. The air filters look dirty so I will change them as well.
I got the two turbo coolant lines out and in with the help of my neighbor, took him about 30 minutes and he was done! Dude kicks ***!! Now I am just waiting on two more lines to come in and install those on the Passenger side and put everything back together. Hopefully that will be the last leak for a LONG time!
Chad
I think I will change the belt, I didn't see any documentation from the Previous Owner or Dealer that it was ever changed. I see the plugs were changed at 64K so I don't see a reason to change them at 80K. The air filters look dirty so I will change them as well.
I got the two turbo coolant lines out and in with the help of my neighbor, took him about 30 minutes and he was done! Dude kicks ***!! Now I am just waiting on two more lines to come in and install those on the Passenger side and put everything back together. Hopefully that will be the last leak for a LONG time!
Chad
Thread Starter
Member
Joined: May 2021
Posts: 154
Likes: 29
From: The Great State of Texas
GL450
So I pulled the thermostat 
When I did the guts (spring and actual thermostat) stayed inside the water pump, the only that came out other than the tube was a long pin that goes inside the thermostat.
Is this normal? I was able to stick the long pin back into the thermostat itself and tighten down the bolts without any binding or misalignment. Is it ok or should I replace it?
Chad
When I did the guts (spring and actual thermostat) stayed inside the water pump, the only that came out other than the tube was a long pin that goes inside the thermostat.
Is this normal? I was able to stick the long pin back into the thermostat itself and tighten down the bolts without any binding or misalignment. Is it ok or should I replace it?
Chad
Super Member
Joined: Jul 2019
Posts: 733
Likes: 298
From: New Orleans
2014 GL450, 1992 W140 300SD, 1993 W140 300SE, 1987 E30 Convertible
Start your car and wait for it to get hot. If it will start going above 90 degrees you need to replace it. Normally it is suppose to be together but with time plastic locks holding all together got broken ones you try to pull it out.
Central pin is a heating element for forced cooling (then you floor engine really bad it forces thermostat to open and circulate through radiator to keep engine cold)
Central pin is a heating element for forced cooling (then you floor engine really bad it forces thermostat to open and circulate through radiator to keep engine cold)
