OM642 oil filter gasket - PeachParts Mercedes-Benz Forum

jay_bob · #1 01-13-2020, 08:20 AM

Son (with the 2008 E320 BT) comes home for Christmas and I notice some oil drops under where he's parked.

Car has just turned 200k and had the oil cooler seals done before I got it.

Get the car up and notice the left front corner of the engine is oil soaked. Yuk. Swapped cars with him again so he could get back to school and his sweetie.

So after taking off a few pieces up front (which I can do in my sleep after having to install an alternator 3 times) I determined the oil was leaking from where the oil filter ties into the front of the engine.

Ordered up a gasket and got into it on Saturday.

First you have to take off the following (see my post on changing the alternator W211 CAN Bus problems)
Belt drive cover
Y-pipe
Silver tube from the turbo outlet
Discharge side muffler and the left intercooler hose
Belt cover bracket
Belt
Belt tensioner
Left side fresh air hose (the air box can stay)
Radiator fan (gives you more room but not absolutely necessary) - remove front cross member (3 bolts on left, 3 on right, 3 on center, flip over, unclip hood release cable). Two spring clips top left and right, unplug electric connector, release (power steering?) line from back of fan assembly lower left and right, pull fan up.

Before going further remove the oil filter and set it aside. Using your oil change sucker or a turkey baster suck out the oil remaining in the canister sump. You don't need to drain the crankcase to do this, the oil mostly settles down into the oil pan and there's very little leakage.

Put a clean rag/paper towel in the oil filter canister can so nothing falls in.

There are a total of 7 fasteners holding the oil filter assembly in.

First there is a bracket going into the head on the inboard side of the filter canister. Two E10s in the back of that bracket at 90 degrees to one another, one into the head and one into the oil filter canister.

Then there is an E10 on the opposite side that ties the canister to the power steering pump.

And another E10 where the a/c suction line is secured to the front of the canister.

Now you have 4 E10 bolts left going into the engine. Be careful you get the right 4 bolts, there are many others in the area that hold the timing cover and the power steering pump.

Have some paper towels ready, you are going to get some oil. Not a huge amount but be ready.

Once you have the 4 bolts removed then gently rock the canister to free from the engine.

The gasket on mine was rock hard and I had to pick it out of the grooves. It came out in pieces.

Clean everything up, put new gasket in, reassemble.

Lost so little oil it was not noticeable on dipstick.

Still dry as of this morning.

scotjack · #2 03-01-2020, 12:16 AM

Very clear, and will definitely help with my steering pump replacement.

engatwork · #3 03-01-2020, 07:44 AM

Good job with the write up. Thanks

jay_bob · #4 02-01-2021, 06:33 AM

I'm coming back around on this because I ended up having to replace the entire oil filter tower.

There is another gasket in the neck that also fails. Unfortunately this one is not available for separate purchase.

The entire tower assembly is about $150 at the dealer and you get a new oil filter and block gasket already installed and ready to go.

So if you end up having to do this job just go ahead and replace the whole thing.

paul roberts · #5 02-01-2021, 12:50 PM

Quote:

Originally Posted by jay_bob

I'm coming back around on this because I ended up having to replace the entire oil filter tower.

There is another gasket in the neck that also fails. Unfortunately this one is not available for separate purchase.

The entire tower assembly is about $150 at the dealer and you get a new oil filter and block gasket already installed and ready to go.

So if you end up having to do this job just go ahead and replace the whole thing.

I got tired of having to buy the whole assembly for customers when they leaked. Ended up finding the gasket in the neck on Amazon. if you type in Part #624 180 1410 or #642 184 0080 which is the whole assembly and the mating gasket, the one you want will also come up as a replacement. The application may say that it's for a Sprinter.

jay_bob · #6 02-01-2021, 02:32 PM

Wow thanks for that info

I did the head side gasket and then had to go back and do the whole tower on the 2008 ML320. So far I have only done the head side gasket on the E320. Whenever I do the oil change on the E320 next I will be sure to have one of those middle gaskets on hand and renew it.

Found the link: https://www.amazon.com/Dorman-926-365-Filter-Housing-Mercedes-Benz/dp/B08K1LXKWQ

When searching type the number in without spaces or dashes 6421801410 and it will come up in the results.

WaarrEagle · #7 07-17-2021, 09:59 PM

Just finished replacing the 2 gaskets on my oil filter housing. Not too bad of a job. TBD if it fixes my leak but my old gaskets were rock hard and came out in pieces.

For anyone else that stumbles across this, I did not take off as many pieces as OP. Attached are 2 pages from the Mercedes Service Manual. One with the procedure and another with the belt routing. I also found this YouTube video helpful: https://www.youtube.com/watch?v=BSopKujwK0U

jay_bob · #8 10-18-2021, 11:16 AM

Quote:

Originally Posted by WaarrEagle

… I did not take off as many pieces as OP….

Agreed, to just access the filter tower you don’t have to take all that stuff off.

However to clean up the mess it was necessary to remove all that stuff to get at all the areas that were oil caked.

87tdwagen · #9 10-18-2021, 12:14 PM

good write up, the gaskets are available in a set for aprox $20 at several retailers per the part number 624 180 1410 as listed earlier. Also as mentioned marketed for Sprinters. The OM642, being an engine used in so many applications, does require some finesse in parts searches. I have found that sometimes MB NLA listed parts for this engine, are readily available when searching via Sprinter or (2007-08) Jeep Or Chrysler Euro routes instead, leading to plenty of parts offerings. Sometimes international is the way to go. Searching for the intercooler, it is NLA via Jeep, also for the corresponding MB model is also NLA, but finding one in the UK was easy, and still plentiful which reflects the greater number of vehicles with that engine in Europe, still have good support. Food for thought, but important if you plan on keeping it as parts inventories for out of production models are getting harder to come by year after year.