Hello All,

Please forgive the naive questions of a newbie!

If all goes to plan, I should be able to pick my cylinder head up from the machine shop tomorrow. After replacing the 'o' ring seals on the fuel pipes, I started the engine. This was when I found that the inlet valves on No. 6 weren't doing a great job of keeping the combustion gases in the cylinder!!

Has anyone else seen inlet valve seat recession on an OM606? Allegedly, mine has 125k on the clock. The valves had sunk by getting on for 3/16", and I suspect the hydraulic tappets were towards the end of their range.

Anyway, some new inlet valves and valve seats later, I hope to put the engine back together tomorrow. I have read with great interest about the milli-volt IP timing method. Has anyone tried this on an OM606? How many mV should I be expecting to read on this engine? I am fitting a new set of BERU glow plugs, and I've had new nozzles put in the injectors, so all should be fairly well balanced.

Cheers!