hello Mr greybeard this is what I came up with, the inner spring has no effect because with both keepers held with springs in position in your hand it rattles about. I am 99point 9 percent that everything is the same as my valve set up so here goes, I can't help with fully compressed position because the cam bushes are out but I have just done this.. VALVE 99.74mm long ----top keeper 10 mm thick..----bottom keeper 5.5 mm thick..----OUTER spring 48mm long free length..----collets 7mm long..---top of valve to where collets sit 7.7mm ..----compressed spring in head ..- gap between first full coil 2.9mm ..-- second gap3.30 mm..--- third gap 3.3 mm..--- fourth gap 2.90mm , hope this can be of help
Hi Berger,
I'm in the shed. My measurements are not much different to yours.
All in mm
Valve length = 99.45 overall.
Top collar, where the collet sits = 7.3.
Bottom collar 5.5 thick overall.
Collet is 7.76 deep.
Outer spring, free length = 46.6.
Valve tip to top of collet rebate = 7.8.
When fitted in the head the valve springs have an average gap of about 3.
When fully compressed in the vice the outer spring measures 23. This is obviously much shorter than when fully compressed by the camshaft.
The possible range of movement for the valve is about 9.5. This is the measurement between the top of the valve guide and the bottom of a collet.
All of the above was measured on the drive-side Inlet valve, the one that's playing up.