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Sidevalve valve lifter problem

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Afternoon All,

The decompressor lever on my Big 4 has ceased to stop the engine lately. On inspection it is not lifting the valve. It looks like that if it rotated a little further it would. There is some wear on the lifter, does not look too bad but I am not a good judge.

I am unable to further take apart the lifter - see photo, is it possible to remove the arm from the spindle and reposition it so the valve is lifted higher? I have tried to free the arm to no avail.

The whole mechanism is not helped by the casting the valves sit in wiggling about a bit - how is this remedied? The head is down tight enough.

Many thanks

Dave

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I have split the assembly using heat and a hammer but cannot get it to lift the valve. I think it may be wear preventing it as it will lift with the unworn edge (rotating it the wrong way) so a new spindle which I see the NOC shop has could be the answer.

 



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