#2burners

Just when i thought that i would be immune to this common problem that can cause these om 642's to grenade nope.. was doing an oil change and noticed some oil residue on the passenger side rear corner of the pan. In it went to the dealer and they confirmed it was the start of oil cooler seal failure.. Apparently mother Mercedes and the new and improved gasket material don't prevent it from leaking. The car has 55k miles on it. Very dissapointing to say the least. I did purchase the extended warranty and am thankful i did as this repair will probably cost the same as warranty. OIl used since first drain has been M1 ESP 0W-30 with Mann HU-821-X filter.

I don't post often but I'd figure I would share this info for those who give a crap. What i also find interesting is i own a 2008 sprinter with same 0m642 with 100k miles on the clock and it hasn't posed this failure yet as i expect it to.

Tony

kajtek1

Tell me what engine has no weak point?
sure with oil cooler access if you don't DIY the cost is big, but compare to oil cooler replacement on Ford 6l Powerstroke.
I own the truck 4 years with low miles and had to do the job twice already.
Is Sprinter having exact cooler?

#2burners

Sprinter cooler same spot same engine with the exception of no scr and some minor fitment stuff like air filter housing etc.. As far as weak points yeah they all do , But i'd rather work on my 2014 ram with cummins i6 .

marc hanna

My'08 R-class hasn't had the problem either. Just rolled over 120,000kms. I think your's may be an anomaly.

kajtek1

I check records on my 08 Bluetec and oil cooler was replaced at 140k miles.
Seems the question is not "if" but "when"?

#2burners

Marc , i'm assuming that the mileage your r has is around 75,000 miles vs. kilometers? is that correct? I sure hope its just an anomaly that mine failed so soon. FWIW the non bluetec sprinter has been getting the Pentossin brand oil spec 229.51 5W-40 ever since M1 discontinued the esp formula M 5W-40. I will probably have some analysis done on the sprinter oil and the gl around january as it will be around oil change time again.

Tony

marc hanna

Yes, it's about 75,000 miles. I've been doing regular oil analysis just to prove to myself which oils perform best. The MB branded 229.52 performed very well. The M1 ESP not as much. Just waiting on my most recent results on the Amsoil. That being said Amsoil doesn't have approval for the bluetec yet.

#2burners

I will post up the Pentossin and the M1 results to your thread in Jan.

Tony

visual_image

Hi #2Burners,
I had exactly the same problem as you did on my 2012 E350 bluetec. Oil cooler seal leaked around 54000 miles. Had it fixed under warranty, but came out with a broken bolt on the exhaust manifold that had to be drilled and tapped. As a bonus, the technician failed to tighten bolts around the turbo, so I had an exhaust leak which lead to a melted wire harness. Been waiting a month now for the new engine harness to come in so they can replace it.

#2burners

I picked the GL up yesterday only to find on the service invoice my tech had a broken bolt as well on the exhaust that he had to drill out! Also stated on the invoice was the tech performed a leak test to the exhaust and charge air / intercooler piping after re-assembly.


I'd probably assume it was the exhaust to turbo connection. I believe theses bolts are a copper bolt ,so I can understand why they break when removing the turbo.


On another note, the engine was filled with MB 5W-30 part# 001-989-37-01-usa9.


Tony

20swrt

Did you purchase the GL since brand new ? I did not install my engine cover to keep things cool around the oil cooler area. This oil cooler in the V channel is just so prone to oil leak problems also in other engines like the Ford pickups. Im guessing its due to differences in expansion rates during startup and cooldown.

kajtek1

I own 6l Ford truck and oil cooler in that has different kind of failures.
It doesn't leak oil, but clogs the passages, leading to too hot oil and potential coolant puke.
MB for decades had radiator-style oil coolers usually mounted on side of the main radiator.
Those work well even after 40 years in the service.
What made them making fluid-cooled coolers?