Tomei Powered PISTON KIT - Manual (Page 15)

INSTALLATION
Please refer to the official workshop service manual from the vehicles manufacturer for detailed assembly informatio
1. CYLINDER BORING
① Always compare diameter of each cylinder bore with the
Pistons skirt to confirm the correct clearance.
IRON BLOCKS 0.050～0.055
ALUMINUM BLOCKS 0.045～0.055
EJ 0.035～0.045
【MEASURING THE PISTONS SKIRT DIAMETER】 Cylinder Bores inner diameter =
Measurements are to be taken from the lower Piston Skirts outer diameter +
side of the Piston, Trust side, 10mm from the Piston clearance specs
base of the Skirt.
② Have the Cylinder block bored to suit.
Always use a Dummy Head (Torque plate) when
you have the Cylinder Block bored.
③ Once Cylinder Boring has been completed, use the
Cylinder Gauge to verify that the clearance is within
the required values.
CLEARANCE SPECS (mm)
10mm
縦軸方向
上面より
約10mm下
センター
下面より
約10mm上
10mm
Thrust Direction
Direction of
spindle
Approx 10mm
below the
deck surface
Center
On approx
10mm the
lower side
④ You'll find unwanted course edges at the bottom
of the cylinder bore after boring. Remove all metal
shavings and rough edges, and then chamfer
approx R0.3 with a file or similar tool. Do this at
the bottom of the bore and all surrounding areas.
Clearance R 0.3
15
Figure is the Cylinder Block viewed from the bottom.