617 Turbo oil return line. Replacing seals - PeachParts Mercedes-Benz Forum

dmorrison · #1 11-11-2004, 09:09 PM

Want to post this job that I just did so anyone doing it can know how much of a PITA it is. But I have done it twice now and have learned a few tricks.

Parts needed. 2 orings, 1 gasket, 1 upper oil pan grommet.

Tools needed
Ratchet with a 18 inch extension and a spring style universal.
10MM socket, 17MM socket, 10MM closed end wrench, 5MM allen socket, screwdriver, permatex high tack.

Removing the tube assembly. From below I removed the 2 mounting bolts for the upper tube. I removed the outer bolt from the front. Between the alternator and the engine mount. Use the ratchet, the 18 inch extension, the spring universal and the 10MM socket. I removed the rear bolt from the rear of the engine. Go between the drag link and the steering shock. Again the 18 inch extension spring universal and the 10MM socket.

Now unbolt the AC high pressure line that goes under the radiator and is bolted to the passenger side of the engine. You use the socket, 18 inch extension, spring universal and the 17MM socket. Also unbolt the bracket that is bolted just above the oil pan flange. Use the 10MM socket and the 5MM allen socket. Unbolt the 2 nuts on the top and then unbolt the 2 screw holding the oil pan. You need get the AC line out of the way so the tubes can move forward.

Using the screwdriver pry the large upper oil pan seal upward. Now push the joint towards the front of the car and seperate the 2 tubes. The reason you unbolted the AC line is because the oil tubes have to move forward enough to allow then to seperate they have to move to where the Ac line is located.

Clean the parts and remove the Orings, oil pan grommet and the turbo gasket. Install the Orings and new oil pan grommet. I used the High tack to apply the turbo gasket to the top tube. Clean the uper oil pan openning. Lube the o rings and oil pan seal with oil. Slide the lower tube into the upper oil pan. Position the upper tube next to the turbo and mate the 2 tubes. This may require swearing or a helper. Not much room for the tube and your hands. I had my son hold the upper tube against the turbo from above. this allowed me to manipulate it without it falling. Having the high tack hold the gasket in place is a godsend. Otherwise Lots of frustration.
Position the upper tube over the turbo opening and have I had my son hold it in position from above. Feed the bolts into the uppertube/turbo flange and hand tighten them. This does require some positioning of the hand/arm/car.
Use the ratchet, 18 inch extension, spring universal and 10mm socket to tighten both bolts. press the upper oil pan seal into position on the lower tube.

Bolt the AC line back on the engine block and oil pan

This job is a PITA. but is doable. It does require some contortionist arm postitioning. Each person will have to figuer there own abilities. IE size of arms and hands.

Dave