Westerbeke 20B TWO Tehnical Manual page 30

Cylinder Head Inspection and Repair
Check guide for ware and damage.
Check for valve contact,
wear, damage, and sink of seat face.
Valve Guide Replacement
If a valve guide is found defective. replace it.
1. Remove the valve guide by pressing at its upper
end and pull it out to the valve seat side.
2. Install the valve guide by press fitting the guide
from the upper side ofthe cylinder head to a height
of 14 ± 0.5 mm from the valve spring seat face.
Westerbeke Engines 28
Check cylinder head surface for warpage between
bolt holes: within O.05mm
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Press·fitting Valve Guide
Check for cracks, damage,
water leak and remove oil, sludge,
sealant deposit, carbon deposit.
(\625)
(\612)
(\66.6
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