Oil in coolant
Thread Starter
Newbie
Joined: Apr 2022
Posts: 9
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2021 Cabrio E53, 2014 Moto Guzzi California
Oil in coolant
Glk 350, 80,000 km, 2012, v6, 4matic
Dealer inspection, oil in coolant. No coolant in oil.
suggested new oil filter housing and thermostat.
this puzzles me; oil/coolant crossover is usually due to a head gasket, where the two fluids are thinly separated.
the oil lines and coolant lines do not appear close anywhere else.
I did read than oil cooler failure may cause hot oil to seep into the coolant lines.
1. think they have it right?
2. Are these do it yourself repairs? (Assuming a fair skill level)
Dealer inspection, oil in coolant. No coolant in oil.
suggested new oil filter housing and thermostat.
this puzzles me; oil/coolant crossover is usually due to a head gasket, where the two fluids are thinly separated.
the oil lines and coolant lines do not appear close anywhere else.
I did read than oil cooler failure may cause hot oil to seep into the coolant lines.
1. think they have it right?
2. Are these do it yourself repairs? (Assuming a fair skill level)
Thread Starter
Newbie
Joined: Apr 2022
Posts: 9
Likes: 1
2021 Cabrio E53, 2014 Moto Guzzi California
I am blog deficient.
oil was reported in coolant reservoir.
no coolant in engine or transmission fluids.
deemed to be coolant line going through oil filter housing.
oil was reported in coolant reservoir.
no coolant in engine or transmission fluids.
deemed to be coolant line going through oil filter housing.
MBWorld Fanatic!
Joined: Jan 2009
Posts: 2,780
Likes: 115
From: Northern NJ
GLK 350 / Porsche 993
Sounds like total BS and close to fraud. Find another dealer - or never go to a dealer. Find a good honest mechanic if you don't diy.
The recommended repairs have nothing to do with the problem either. Both would be very simple job that they would charge lot of money fore.
Last time I went to dealer they could not figure out which light bulb needed replacement (not a joke). So I don't bother any more.
You are right blown head-gasket or failed oil cooler (warmer) is where the two fluids meet.
The recommended repairs have nothing to do with the problem either. Both would be very simple job that they would charge lot of money fore.
Last time I went to dealer they could not figure out which light bulb needed replacement (not a joke). So I don't bother any more.
You are right blown head-gasket or failed oil cooler (warmer) is where the two fluids meet.
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MBWorld Fanatic!
Joined: Sep 2015
Posts: 2,585
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2013 glk 350
Pick up a cylinder head leak tester to check for a head gasket leak , maybe 20$, you put it on top of the radiator expansion tank and it measures if any exhaust gas is present in the antifreeze, it is possible the transmission cooler is inside the radiator and the transmission mission is loosing oil, but since mb is so smart, they made it impossible for you to check it. I never go to a dealer, they are 3-5x higher in price .
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Super Member
Joined: Feb 2007
Posts: 613
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From: Republic of Texas
W203 W212 W211 R53MCS
Very common issue due to old gasket at the oil filter housing/cooler. All M272 and M273 motors suffer from this problem. And yes, the thermostat has to be removed but most of the time they come apart, so a new one needs to be installed.
MBWorld Fanatic!
Joined: Jan 2009
Posts: 2,780
Likes: 115
From: Northern NJ
GLK 350 / Porsche 993
I guess it's true that oil cooler/warmer is part of oil filter housing. I'm surprised it failed so early.
Good pic here: https://www.ebay.com/itm/184900269299
Good pic here: https://www.ebay.com/itm/184900269299
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Joined: Mar 2013
Posts: 915
Likes: 185
Yikes:
Do you know if the M276 engine, on the updated GLK, has this same oil filter set up and if so, is it affected by the same problem?
Thread Starter
Newbie
Joined: Apr 2022
Posts: 9
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2021 Cabrio E53, 2014 Moto Guzzi California
Work is done.
had a private mechanic review.
It was supported.
I suppose that one is shocked when Mercedes touts its reputation for reliability, and find out they are worse than Fords.
had a private mechanic review.
It was supported.
I suppose that one is shocked when Mercedes touts its reputation for reliability, and find out they are worse than Fords.
MBWorld Fanatic!
Joined: Jul 2012
Posts: 1,369
Likes: 319
From: WI
GLK 250
And clearly, you have either not owned enough Fords or Mercedes to know better
