Date registered: May 2007
Vehicle: 2003 Mercedes Benz E500
Location: San Francisco Bay Area
Mentioned: 0 Post(s)
Quoted: 1 Post(s)
I owned a '70...
250/8 for about 20 years. I put close to 200K on the car. The carbs will require attention from time to time. Basic tune-up/valve adjustment is every 12K.
Make sure all the electrical grounds are in good shape, as with a copper radiator, aluminum alloy head and iron block, you can end up with electrolysis, a/k/a "metal termiting" of the cylinder head if the engine is not well grounded. Something you will not have had to be concerned with on a Porsche... don't know if this was an issue with BMWs.
1968-69 cars have a "smog pump" which to my mind makes then less desirable than the later 250s that utilized the dual diaphragm distributor as an emission control device. The original air pumps had fiber-composite vanes, which when they fail, will fill the air injection system full of fibrous crud... not fun to clean out.
All in all, if your mechanically inclined, they are straight forward cars, and very enjoyable to drive and own. Please also note, with a heavy chassis and realatively small engine, the fuel economy is nothing to write home about...
If well maintaned, the cars can last a long time.