Replacing the old overworked exhaust and inlet valves when rebuilding the engine is a sensible precaution, the old valves become brittle and can break off around the
Valve head area, allowing what is left to drop onto the top of the piston causing untold and very expensive damage.
Renewing these
Valve-Guides at the same time will help ensure the engine remains smoke free, especially on start up.
Please make sure that the parts you order are compatible with your model. CMS carry all the gaskets and seals you will require; order them at the same time and save money on shipping with a multiple order. Why not use the same sealant as the factory professionals: 08C70K0234M complete the job like a pro!