Changing engine of 280S W108 (1969)

[Jambo]

Hi everyone,

I'm a new W108 owner in Finland. Car is absolutely beautiful, and I was really surprised how well it handles (I've had a couple of other cars from sixties).

However, I've immediately run into trouble with the engine. I knew it had a faulty camshaft when I bought it, but it seems that there are other problems (eg. engine practically stops after driving 80km/h for one hour, takes a LOT of oil etc.).

I could get it fixed (I don't have knowledge nor workshop to do it myself), get a 'new' engine that is similar as it has now, or get a replacement engine from some totally different model.

My question is, is that last option feasible? In general, is it a Good Thing (tm) to do? I'm sure it can be done, but what kind of issues I might face? Any recommendations on which engine model might be good for this car?

Any tips, experiences and recommendaions are very much welcome! Thanks!

BR,
Janne

[ja17]

Hello Janne,
The first thing to do is find out what is wrong with your engine. An engine transplant from another model could be an expensive and complicated proposition. You may be better off finding another good used 280-S engine to put in the car.
Some earlier overhead camshaft inline six cylinder Mercedes engines could be a possible conversion if you cannot find the correct unit. The earlier W111 series could work and the later W108 250-S could be a possibility. In addition the W114 (250, 280 possibly 230) single overhead camshaft carbureted engines 1967-72 would be a close match also. These W114 engines would require a lot of change over of pulleys, waterpumps and other accesories, but the basic unit is nearly identicle. There will be many minor issues with any non correct unit. Email me if you find any possibilities and I will fill you in on some specifics.
My advice is first diagnose your original unit for repairs. Second look for a correct good used engine if repairing yours is beyound your resources. Lastly look into some kind of conversion.
Try placing a wanted add for a good used correct engine with your local Mercedes Club or vintage car magazine.
I have a good friend in The Netherlands who has recently purchased several good used engines for his vintage Mercedes cars this way. Good luck! Keep us up to date.

Joe Alexander