R50 valve guides - correct ordering; needing camshaft
Posted: Thu Aug 04, 2022 10:50 pm
Fellow old BMW fans:
I need knowledgeable advice. My 1955 R50 is being fitted with new rotating valves and unleaded exhaust inserts. The thing I need to do is order the correct size valve guides. My machinist specifies .519 mm OD (or slightly larger) and 13.18mm, which I presume is the length (I could have my local repair shop do this but I am reluctant to order from them as the prices are excessive -- 10 years ago I paid $500 for a set of R75/6 guides!)
A number of suppliers have them. The Euro is at par with the US dollar so I am considering Meyers or Ulis. I just don't want to end up with the wrong size! I have one of the old guides to measure. By the way my R50 is # 551610, if that makes a difference.
I need a camshaft, and have a similar situation. My shop advises there are 4 different versions. How to get this right?
Regards,
Ken Cruise
I need knowledgeable advice. My 1955 R50 is being fitted with new rotating valves and unleaded exhaust inserts. The thing I need to do is order the correct size valve guides. My machinist specifies .519 mm OD (or slightly larger) and 13.18mm, which I presume is the length (I could have my local repair shop do this but I am reluctant to order from them as the prices are excessive -- 10 years ago I paid $500 for a set of R75/6 guides!)
A number of suppliers have them. The Euro is at par with the US dollar so I am considering Meyers or Ulis. I just don't want to end up with the wrong size! I have one of the old guides to measure. By the way my R50 is # 551610, if that makes a difference.
I need a camshaft, and have a similar situation. My shop advises there are 4 different versions. How to get this right?
Regards,
Ken Cruise