Thanks for all this helpful information
I have for the past 60 000 miles driven my 79 W123 non-turbo with a home-made job in which I fitted heavier flex hoses and double clamped them with the sturdiest clamps I could buy. This way I did not have to undo anything. But I now have a pair of lines from a turbo SD that are in good shape, and I want to redo the job.

Does anyone know if the turbo lines, though a bit fatter, can be fitted easily onto a non-turbo? Both vehicles have the GM style ac compressor.

The SD lines are different due to the difference in the SDs oil filter housing. When I did my 617->107 swap I used the SD oil filter housing to gain clearance to the steering gear and needed to use the SD hoses. You could swap in the SD oil filter housing and use your SD hoses; but you couldn't go the other way i.e. use a 123 filter in an SD. You should also grab the turbo line if you decided to go that route as it's different too, but it can be "adjusted" to fit without too much difficulty.

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Current Stable

• 380SL (diesel)
• Corvette C5
• Manx
• Baja Bug
• F350 Powerstroke
• Auburn Boattail Speedster replica

Thanks! I am sure this comparison will be of great help to others too.

I happen to have both the W126 and W123 oil filter housings, and now I see another difference between them that sinks my project (I think)

That is that the W126 housing doesn't have the female thread at the side plate bolted to the housing for the oil pressure gauge line -- there is a vacuum dashpot instead.

That's not a vacuum dashpot, rather it's the sender for the electric oil pressure gauge.

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Current Stable

• 380SL (diesel)
• Corvette C5
• Manx
• Baja Bug
• F350 Powerstroke
• Auburn Boattail Speedster replica

oops!