Cylinder Block
Inspection
1. Measure wear and taper in directions X and Y at
three levels in each cylinder as shown.
CYLINDER BORE SIZES (A or B)
NOTE: To maintain proper piston
clearance, match these letters with
the letters on the pistons. The let-
ters on the block read from left to
right, No. 1 through No. 3 cylinders
on the first line and No.4 through
No.6 cylinders on the second line.
Cylinder Bore Size
Standard (New):
A or I 90.010-90.020 mm (3.5437-3.5441 in)
B or 90.000-90.010 mm (3.5433-3.5437 in)
Service Limit: 90.07 mm (3.546 in)
Oversize
0.25: 90.25-90.26 mm (3.553-3.554 in)
0.50: 90.50-90.51 mm (3.563-3.564 in)
Bore Taper
Limit: (Difference between first and third measure-
ment) 0.05 mm (0.002 in)
• If measurements in any cylinder are beyond
Oversize Bore Service Limit, replace the block.
• If block is to be rebored, refer to Piston Clearance
Inspection (see page 7-13) after reboring.
NOTE: Scored or scratched cylinder bores must be
honed.
Reboring Limit: 0.50 mm (0.020 in)
2. Check the top of the block for warpage.
Measure along the edges and across the center as
shown.
SURFACES TO BE MEASURED
Engine Block Warpage:
Standard (New): 0.07 mm (0.003 in) max.
Service Limit: 0.10 mm (0.004 in)
PRECISION STRAIGHT EDGE
CYLINDER
BORE
GAUGE
Inspection
1. Measure wear and taper in directions X and Y at
three levels in each cylinder as shown.
CYLINDER BORE SIZES (A or B)
NOTE: To maintain proper piston
clearance, match these letters with
the letters on the pistons. The let-
ters on the block read from left to
right, No. 1 through No. 3 cylinders
on the first line and No.4 through
No.6 cylinders on the second line.
Cylinder Bore Size
Standard (New):
A or I 90.010-90.020 mm (3.5437-3.5441 in)
B or 90.000-90.010 mm (3.5433-3.5437 in)
Service Limit: 90.07 mm (3.546 in)
Oversize
0.25: 90.25-90.26 mm (3.553-3.554 in)
0.50: 90.50-90.51 mm (3.563-3.564 in)
Bore Taper
Limit: (Difference between first and third measure-
ment) 0.05 mm (0.002 in)
• If measurements in any cylinder are beyond
Oversize Bore Service Limit, replace the block.
• If block is to be rebored, refer to Piston Clearance
Inspection (see page 7-13) after reboring.
NOTE: Scored or scratched cylinder bores must be
honed.
Reboring Limit: 0.50 mm (0.020 in)
2. Check the top of the block for warpage.
Measure along the edges and across the center as
shown.
SURFACES TO BE MEASURED
Engine Block Warpage:
Standard (New): 0.07 mm (0.003 in) max.
Service Limit: 0.10 mm (0.004 in)
PRECISION STRAIGHT EDGE
CYLINDER
BORE
GAUGE