replacing 420 sel engine - PeachParts Mercedes-Benz Forum

weekendmechanic · #1 07-22-2007, 08:03 PM

Is it possible to replace a 420 sel engine without pulling the tranny too?

Pete Geither · #2 07-22-2007, 09:00 PM

You will get more response in the Tech help section. Matter of fact,,, I'll just move it there.

david s poole · #3 07-23-2007, 10:11 AM

yes it's possible but a lot easier to pull engine and tranny at same time.save several hours by changing tranny over while out of car.

weekendmechanic · #4 07-23-2007, 10:43 AM

Thanks Dave, can the exhaust manifolds stay on the block or do i have to take them off in the bay?should i take the alternator , power steering and AC off the front of the engine? i am buying a used engine to replace the one in the car, timing chain broke in the old motor. I have a great hydrolic crane with an electric penant for picking the motor, so thats not a problem.I just never worked on a mercedes before.

jhodg5ck · #5 07-23-2007, 10:54 AM

Quote:

Originally Posted by weekendmechanic

Thanks Dave, can the exhaust manifolds stay on the block or do i have to take them off in the bay?should i take the alternator , power steering and AC off the front of the engine? i am buying a used engine to replace the one in the car, timing chain broke in the old motor. I have a great hydrolic crane with an electric penant for picking the motor, so thats not a problem.I just never worked on a mercedes before.

I'd leave the manifolds on the block, just disconnect from the one pipe on the pass side..

All the accesories can stay on as well..they are a lot easier to get off once outside the car.

Hopefully you have the service CD's..they are good to have as reference material.

Jonathan