I've got an '87 300SDL 603 engine. Are the cylinder liners sweat or "friction" removed and/or installed?

The liners are not serviceable as in industrial or over the road diesel engines. They are sleeves that are like the ones used to repair a cylinder in a conventional engine block.

They need not be removed for a first oversize bore. They just bore them as they would a solid cylinder. I don't know about the 603, but Pistons are so expen$ive for the 616/617 engines that I have had the machine shop remove and replace the liners and rebore them to standard size for reuse of the original Pistons.

They are typically removed by running a weld bead up the length of the liner after which it is easily collapsed and removed. The replacement liner is then installed, but must be bored to fit the piston and the top cut flush with the block deck.

Say why you are asking, and maybe I can be more specific with a usable answer.

Hope this helps.

IIRC neither sleeves nor liners are available for the 603.96 (3.0 turbo). Liners ($$$) are available for the 603.97 (3.5 turbo). The cost of properly rebuilding a 603 makes the cost of a quality Metric Motors block good value.

Sixto
83 300SD

The machinists have access to all different liner sizes. They can come up with a liner that will work. They measure the OD of the liner and bore the cylinder to match properly, install the liner, then bore the ID of the liner to fit the Pistons, then cut the top flush with the block deck. It doesn't have to be an MB supplied liner.

NOW, all that said, it applies to the 603 only if it is a dry liner as is used in the 616/617. I am not familiar with the 603 in that area, so if it is not sleeved in the same way, then what I describe does not necessarily apply.

603 (60x) is a dry-sleeve engine.

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