Yes more valve seat unleaded fuel questions!
My engine serial number starts with BHM 1439 1XXXXX. While I was informed in the past, via this newsgroup (thank you) that it is likely a rebuilt engine, I still have not been able to identify whether or not my engine has the hardened exhaust valve seat.
So, my questions are:
- Can I look inside the combustion chamber, via the spark plug hole, and tell if an insert has been installed? Perhaps with a borescope?
- Are there any other simpler way to tell.
- If I need to use additives, any recommendations, available in Paris, France?
many thanks, CM