Mercedes ML500 Oil Cooler and Filter Housing Seals, Pressure Port Gasket M112 M113 engines FULL DIY

This video is a full bolt-by-bolt DIY for replacing the oil cooler seals (o-rings, gaskets), the oil filter housing seal, and the pressure port (aka timing cover plug or expansion plug) gaskets. The repairs are shown on W163's - a 2005 ML500 and a 2003 ML350. Check the Pinned Comment for more information.

Timestamps, Part numbers, Torque values, Links:
00:22 Diagnostics for these oil leaks
03:15 Loosen the oil filter assembly (use a 14 flute, 74mm cap wrench)
03:58 Drain the engine oil, remove the drain plug and gasket (13mm)
04:55 Info on the drain plug gasket (MB part A0007-603-014-106)
05:28 Install the drain plug and new gasket (torque is 30 Nm or 22 ft-lbs)

06:06 Remove the serpentine belt (17mm)
08:07 Locate the four T30 fasteners on the oil cooler and decide if you want to remove the air pump for better access
08:40 Remove the air pump
09:45 Remove four T30 fasteners for the oil cooler
11:22 Remove the oil filter assembly from the oil filter housing

11:49 Important notes about the required special 46mm socket and extensions for the oil filter housing removal
14:55 Loosen the big oil filter housing union bolt (46mm)
15:57 My setup - a huge 40" breaker bar (Tekton SBH00340 with Nieko extension 00236A)
16:16 Remove the oil filter housing from the timing case cover

17:00 Remove and replace the oil filter housing seals on the bench:
oil cooler seals are MB parts 112-184-02-61 and 112-184-03-61

19:29 Remove and replace the oil filter housing seal on the timing case cover:
MB part is 112-184-00-61
20:50 Install the oil filter housing to the timing case cover
22:49 Install the 46mm union bolt to the oil filter housing: torque is 70 Nm or 52 ft-lbs

23:40 Info on the Pressure port/Expansion plug gasket (overview and approaches)
25:16 Remove the Pressure port plug (optional, H6 or 6mm Allen)
Port plug copper gasket MB part number is 007603-012110
install torque for the plug & copper gasket is 20 Nm (177 inch-lbs)
26:11 Remove the two E10 bolts to remove the Pressure port plate and rubber gasket

27:46 Detail of the pressure port plate and gasket on the bench
"new" style plate part number is 112-015-06-30
"new" style gasket part number is 112-184-02-80
30:45 Clean the bolts and bolt holes before re-installing the plate
31:00 Install the plate with a new gasket; torque is very low, just 8 Nm (71 inch-lbs, 5.9 ft-lbs)

32:36 Install the new o-rings and oil filter to the filter assembly (Mann HU718/5x fleece filter)
37:19 Install the oil filter assembly to the oil filter housing (torque is 25 Nm or 18.5 ft-lbs)
37:52 Install the four T30 bolts for the oil cooler to the oil filter housing
for M113 engine: torque is 9 Nm or 80 inch-lbs;
for M112 engine: torque is 11 Nm or 97 inch-lbs

40:25 Install the air pump (torque for the E10 bolt is 12 Nm or 9 ft-lbs)
41:40 Install the belt (17mm)

45:06 Refill with engine oil (for ML500, refill is about 8.0 L or 8.5 quarts)
48:37 Check the engine oil level with the dipstick and via the dash display

Water pump, thermostat, belt tensioner, idler pulley DIY video:
   • Mercedes W163 ML500 ML350 Water Pump, Ther...  

Fan and Fan Clutch DIY video:
   • Mercedes ML350 Remove Fan & Fan Clutch DIY...  :

I hope this video was helpful. Thank you for watching, and good luck with your repair! : )