valve adjustment
#1
#3
I am very surprised you've got to that mileage without a top-end overhaul, frankly. Good advice on compression test. Valve adjustment can be a bit of a PITA if you cannot get the right thickness shims. A neat trick is to turn them over, so the little dent the valve eventually makes in the shim is on the other side and the valve bears on a fresh surface. You will definitely need a micrometer if reusing shims, because the thickness letter code wears off.
#4
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Well, it might be a good time to check the adjustment, at least. Checking the valve clearance is easy. *Adjusting* the valve clearance is a royal pain in the butt.
Agreed on the compression test.
Do both and decide from there.
Cheers
DD
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