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Originally Posted by psfred
Peter:
The block design of the four and six cylinder engines of the 60s and 70s was very smilar to the diesel engine block design. I certainly could mistake a gasser block for a deisel block without the heads on, and the cranks don't look that different, either.
Remember, Benz was a fairly small concern in those days, engineering talent was spread a bit thin. If the desgn works well, modify it a bit. You could drop a dizzy right onto the oil pump shaft of the OM 61x engines without a bit of trouble, and I'd bet there is a nice flat spot next to it for the bolt hole for the holddown!
Obviously, they cannot be interchanged, I don't believe, but they are very close.
Peter
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Same with VW, there little 4cyl gassers blocks look identical to the diesels, even the new diesels and gas engines are not too far removed. I have a late 90's 2.0L short block from a jetta sitting on a rack at work and if you look at it from ten feet away you could mistake it for a twenty year old diesel. Designs that stand the test of time. It's a wunnerful thing.