BSA F12 Sloper - thickness of Valve Chest cover Gasket?
I have just taken delivery of a Ransomes 18" Marquis Mk5, Serial Number EH1310, which has a BSA / Norton Villiers F12 Sloper engine, Number RS119B 3028 K.
Firstly any ideas as to the Year of Manufacture - 1970?
Secondly I have noticed an oil leak from the Valve Chest Cover, and I presume (before draining the oil and removing the cover) that the gasket is either split or not present. What is the approximate thickness of the gasket, so that I can cut another one. I have either card or cork gasket material...
Many thanks - Mark
Forums
Many thanks Wristpin - will
Many thanks Wristpin - will set to with fine grade!
Mark
Made a copy from Gasket paper
Made a copy from Gasket paper - and thorough cleaned by mating surfaces, using 1200 grit and a Swiss file. Bingo - no oil leak! The original gasket had partially disintegrated, causing an oil leak directly onto the exhaust. Smoked a bit for several minutes, until the oil residue had burnt off the exhaust!
Mark
Valve chest gasket. It’s just
Valve chest gasket. It’s just paper and less than postcard thickness but often the metal cover is warped / distorted. It’s worth the time putting a sheet of fine emery cloth on a flat surface and rubbing the cover over it to detect and remove high spots. I always put a smear of heavy grease on both metal surfaces.
Age. No real idea but guessing that it could be earlier. Paul at Meetens is the man to ask.