TOHATSU BFT115A Service Manual page 443

CYLINDER HEAD
CAMSHAFT RUNOUT
Place V blocks (1) or equivalent under the journal at
both ends of the camshaft.
Set a dial indicator and measure the camshaft runout by
turning the camshaft.
STANDARD: 0.030 mm (0.0012 in) Max
SERVICE LIMIT: 0.040 mm (0.0016 in)
Replace the camshaft if the measurement exceeds the
service limit (page 14-26).
(1)
CYLINDER HEAD WARPAGE
Remove carbon deposits from the combustion
chamber.
MEASUREMENT POINTS
Clean off any gasket material from the cylinder head
surface.
Check the cylinder head for warpage using a straight
edge (1) and a feeler gauge (2).
SERVICE LIMIT: 0.05 mm (0.002 in)
If the measurement exceeds the service limit,
recondition the cylinder head surface.
• Reconditioning must be made within the standard
value of the cylinder head height.
(1)
Cylinder head reconditioning procedure:
Apply Prussian blue compound to the level block to
identify the warpage. Using a fine oil stone, grind the
cylinder head in a figure "8" pattern with the warped part
being the center of the ground part. Or use a lapping
machine to recondition the cylinder head.
(2)
CYLINDER HEAD HEIGHT
Measure the cylinder head height (1).
STANDARD:
103.95 – 104.05 mm (4.093 – 4.096 in)
(1)
14-51