Barksavon
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| posted on 2/1/18 at 11:14 PM |
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ST170 Exhaust Valves
I am refurbing the cylinder head on the ST170 engine that is going in my Tiger and have taken the valves out. All the exhaust valves have a
'build up' of an off white substance on the valve face and back of the valve which extends about an inch up the stem.
Does anyone know whether this is a result of the combustion process or some sort of coating deliberately applied....don't want to wire brush it
off if it should be there.
Thanks
Ian
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ian locostzx9rc2
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| posted on 3/1/18 at 06:51 AM |
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Sounds like it just carbon build up just clean them put them in a drill slow speed get some wet and dry paper / sand paper and clean them advise you
to wear a
Mask
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