M275 Engine Oil Cooler Type, Location, is it rebuildable
Member
Joined: Dec 2008
Posts: 95
Likes: 3
From: Orange County, Ca.
2003 CL600 RentechCL65mod, E55 (sold), E63
Hi Everyone.
I bought a CL600 2003 w the Twin Turbo M275 engine 102K. miles. Does the M275 engine have the internal oil cooler like the pre turbo cars? It looks like they went with an external oil cooler on the M275 therefore the monster job of doing and R&R on it is moot. I can't seem to find that info anywhere. Also if I am on the hook for the internal oil cooler job are they still not serviceable? It seems what goes bad are the gaskets and the aluminum is fine. I have searched for hours so please don't spank me for that. This is the most important question.
Other items I have replaced:
I have replaced both coil packs with Clarks v12icpack units. The cars idle is impossibly smooth. Also R&R all 4 of the accumulators in the ABC circuit. Trans mount and (2) flex disks. All fluids and conductor plate R&R. I have access to lifts and techs in my business. In order to save time and $ I took the car to a dealer and they said I need the oil cooler, both front struts are leaking and some misc items. The service advisor said my engine is leaking oil and the cooler is the problem. 30 hours labor and engine has to Come out etc. Intercooler pump may be bad and the car will need an intercooler prime as the IAT are high.
My searching has revealed that the intercooler pump fails and causes a loss of power. Dealer says a vacuum leak will also cause the same.
Any and all help is greatly appreciated.
I bought a CL600 2003 w the Twin Turbo M275 engine 102K. miles. Does the M275 engine have the internal oil cooler like the pre turbo cars? It looks like they went with an external oil cooler on the M275 therefore the monster job of doing and R&R on it is moot. I can't seem to find that info anywhere. Also if I am on the hook for the internal oil cooler job are they still not serviceable? It seems what goes bad are the gaskets and the aluminum is fine. I have searched for hours so please don't spank me for that. This is the most important question.
Other items I have replaced:
I have replaced both coil packs with Clarks v12icpack units. The cars idle is impossibly smooth. Also R&R all 4 of the accumulators in the ABC circuit. Trans mount and (2) flex disks. All fluids and conductor plate R&R. I have access to lifts and techs in my business. In order to save time and $ I took the car to a dealer and they said I need the oil cooler, both front struts are leaking and some misc items. The service advisor said my engine is leaking oil and the cooler is the problem. 30 hours labor and engine has to Come out etc. Intercooler pump may be bad and the car will need an intercooler prime as the IAT are high.
My searching has revealed that the intercooler pump fails and causes a loss of power. Dealer says a vacuum leak will also cause the same.
Any and all help is greatly appreciated.
MBWorld Fanatic!
Joined: Nov 2010
Posts: 2,605
Likes: 343
From: Welwyn, Herts, UK
2006 S600
The engine oil cooler is a long air/oil cooler low down at the very front. You can tell by the thick feed and return pipes at each end. Its straightforward to replace in principle, but the hose fittings can get seized, and everything gets fragile with advancing years....
Member
Joined: Dec 2008
Posts: 95
Likes: 3
From: Orange County, Ca.
2003 CL600 RentechCL65mod, E55 (sold), E63
The engine oil cooler is a long air/oil cooler low down at the very front. You can tell by the thick feed and return pipes at each end. Its straightforward to replace in principle, but the hose fittings can get seized, and everything gets fragile with advancing years....
MBWorld Fanatic!
Joined: Nov 2010
Posts: 2,605
Likes: 343
From: Welwyn, Herts, UK
2006 S600
If you suspect ABC fluid coming out of the "hose to nowhere" then you should avoid driving the car until you can confirm the fault. Fluid typically leaks from the crimp joints, and is a precursor to a catastrophic failure.
Member
Joined: Dec 2008
Posts: 95
Likes: 3
From: Orange County, Ca.
2003 CL600 RentechCL65mod, E55 (sold), E63
