Reply To: Valve clearance, camshaft, camshaft tensioner – a problem or a serious fault?

[♠️ M77]

Mixture is OK = Center white cone is brown. At full throttle.

Idling rich or burning oil ? = The circle ring at the base of the plug = front engine.

C-shape tip (half moon tip) , coils seem to spark OK. = Nice brown shade.

Threads look black and wet = Burning oil? or signs of engine overheating?

Also get rid of the ix plugs as they don’t really like them but use either basic CR8E or NGK LASER only.

Then show me again ? You want maybe only 4-5 lines of threads dark (normally) but if all the threads towards you finger are all black, either it’s overheating or eating a little bit of oil each time ? unless the fuel is bad ?

Check your oil level and rev it fast in neutral to see if it “puffs out” some smoke ? (VALVE SEALS or VALVES not seating)

or will it smoke if you hold it at 4k revs for a few seconds ? (piston rings , cylinder wall scratched?)