Replace upper oil pan 1980 300sd

My son has a 1980 300sd. unfortunately I have to replace the upper oil pan or you could call it the lower engine half. It is the large aluminum part the steel oil pan bolts too. It has a 2 inch chunk broken at the front main seal surface. Some one had no doubt broke it putting the seal in wrong it was glued in with something like JB weld covered in black RTV. Well it failed my question is can I jack the motor up high enough to replace the pan or must the motor be removed. I am thinking of trying to jack the motor up with the motor mounts disconnected then putting shims 2X4 between motor mounts to hold motor as high as possible. Has any one tried this repair with motor in car? Thanks for any help you can give me.
DHS

I took the pan of the 1979 300sd it was not worth the trouble. I will pull the engine out of the 1980 300sd it is going in. Some how I will get a engine puller. While it can be done it is not worth the hassel. PS the donar car had no head on it.

[lietuviai]

You could try fixing the pan one more time by trying some marine epoxy. I have found that this stuff has some good heat resistant properties plus excellent tensile strength. You just need to make sure the surfaces are and clean and free of any oily residue. It costs about $5 and you can find it at your local big box home improvement store.
It may save you from many hours of R&R'ing the engine.

Using Epoxy I first wire brushed the parts. Then I sprayed them with a lot of brake cleaner. They were spotless, carefully mixing the 2 part epoxy and applying it to the pieces. I let it dry 28 hours in a warm garage. Pressed new seal in it broke at the lip of the seal. Later taking upper oil pan from donor car I find the 1979 front seal is different then the 1980 seals or at least different than the 2 brands of seals I bought for a 1980. And the 1979 seal hardly requires any force to press in. Wish I new before I broke it twice and whoever broke it the first time and made such a mess of it had only ordered seals for a 1979 300sd instead of the correct 1980 seal. It would have saved so much grief.
But I learned that you have a car with no oil pan and the front on jack stands for a month there is still 2 full cups of black motor oil in the upper oil pan. That’s why our oil is always black that oil is not changed during oil change. It just dirties new oil instantly. You would have to drain oil with front of car in air then raise the rear of car to remove this at oil change. I thought this was a kewl thing to learn I’m going to try it when car goes again and oil gets black again and yes we used my moms measuring cup for the 2 cup from upper pan.

[lietuviai]

Originally posted by mattdave
I thought this was a kewl thing to learn I’m going to try it when car goes again and oil gets black again and yes we used my moms measuring cup for the 2 cup from upper pan.

What's her cooking gonna taste like now?

What cooking now I am on the dog food diet.