Spent 6 hours on the 190D, put new main and rod bearings in and the new used crankshaft. Removed old piston rings and cleaned pistons, put new rings on and put pistons in the block. That is alot of work but I love working on mercedes diesel motors, here are some pictures.

Attached Thumbnails

         

More pictures. This is the new bearings going in and the crankshaft.

Attached Thumbnails

     

(Some days it's almost a chicken and egg thing,Do we own these to enjoy
operating or working on?)(Ya, Both)

__________________
'84 300SD sold
124.128

Was there much of a ring groove (wear) in the cylinder walls topmost area...?

__________________
1978 Yellow 300D (The Mustard Toad)
1980 Blue 240D (The Iron Toad)
1989 Grey Mitsu.4WD Mighty Max Pickup (Needs a Diesel transplant bad)

(Open the pod bay doors HAL)

Nope, there is a very small groove but it will be ok. The cylinder walls are in great shape.

Yep...On engines that the customers just wanted re-ringed....we would remove the ridge with a reamer to keep new rings from breaking should they contact the under lip of ridge.....
If its small enough to not cause problem....we would just hone the cylinders to re-establish the crosshatch pattern....

__________________
1978 Yellow 300D (The Mustard Toad)
1980 Blue 240D (The Iron Toad)
1989 Grey Mitsu.4WD Mighty Max Pickup (Needs a Diesel transplant bad)

(Open the pod bay doors HAL)

Someone told me about that, I think I will be ok. Pistons with new rings are in, when I turn motor by hand everything works good. If there is a problem would I be able to tell when I turn the motor by hand?

The time to worry about damaging a ring was when you installed them - if they went in smoothly then I guess you'll have no trouble. You are more likely to damage them during installation particularly with a bit of a ridge at the top of the cylinder. You don't always need a ridge reamer - smaller ridges can be safely removed with careful use of emery cloth.

__________________
1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!

First time putting new rings on and putting pistons in motor and they went in just fine. So I should be fine, I hope.