Thank you,

I've checked on samstagsales.com the set of three wrenches for valves adjustement. They seems to be perfect, except the price which is pretty expensive : 75$.

What is the 3rd wrench for ? To prevent the cap on the top of the valve spring to move ?

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in France : 240D 1981 380 000 km
240D 1984 252 000 km
300D 1978 325 000 km
in the US : Ford Tempo 1993 70K