Quote:
Originally Posted by leathermang
I totally agree with that possibility..... what test/s do you suggest to determine that ?
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Unfortunately I can only think of the wiggle test => gripping hold of the valve and wiggling it in the guide.
This is best done with the head off (well better still with the head off you measure the guides with a go-no-go gauge) but it is possible you might get an idea by positioning the piston near to TDC and then wiggling the valve from the other side. Rocker arms and valve springs need to be removed along with the valve stem seals. Make sure the piston is high enough in the cylinder to stop the valve from disappearing if you drop it! Any noticeable feeling of a gap probably means that if you were to use the correct go-no-go tool you'd (again probably!) find that the guide was worn.