Quote:
Originally Posted by 83w126
The whole issue is that I like the OM606 but not the car it comes in, and I like the W140 because it's the only one that isn't too small to be comfortable. I know it's not necessarily a logical ideal, that's partly why I have thought about it for years but never done it. I have a set of nice wheels that would fit a W140 too, too curb damaged to sell but would look fine once on a car.
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So, assuming that the car is well sorted otherwise, sounds like it’s time for you to blaze new trails.
Lay out what the fit challenges might be - oil pan, engine mount arms, etc. Then figure out how to check each one, one by one.
Worst case you pull the 603, see some glaring issue, and then do a head gasket job and put it back in.