Toyota Tundra. Manual — part 1935
94.000 to 94.012 mm (3.700 to 3.701 in.)
Maximum diameter:
94.200 mm (3.709 in.)
If the diameter is more than the maximum, replace the cylinder block
Fig. 107: Measuring Cylinder Bore Diameter
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
3
INSPECT RING GROOVE CLEARANCE
a
Using a feeler gauge, measure the clearance between a new piston ring and the wall of the ring
groove
Standard ring groove clearance
STANDARD RING GROOVE CLEARANCE SPECIFICATION
Item
Specified Condition
No 1 0 020 to 0 070 mm (0 000787 to 0 00276 in )
No 2 0 020 to 0 060 mm (0 000787 to 0 00236 in )
Oil
0 070 to 0 145 mm (0 00276 to 0 00571 in )
2009 Toyota Tundra
2009 ENGINE Engine Mechanical (3UR-FBE) - Tundra
Fig. 108: Measuring Clearance Between Piston Ring And Wall Of Ring Groove
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
If the clearance is not as specified, replace the piston
4
INSPECT PISTON RING END GAP
a
Insert the piston ring into the cylinder bore
b
Using a piston, push the piston ring a little beyond the bottom of the ring travel, 60 mm (2 36 in )
from the top of the cylinder block
Fig. 109: Checking Piston Ring End Gap
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
c
Using a feeler gauge, measure the end gap
Standard end gap
STANDARD END GAP SPECIFICATION
Item
Specified Condition
No 1 0 23 to 0 33 mm (0 00906 to 0 0130 in )
No 2 0 40 to 0 50 mm (0 0157 to 0 0197 In )
Oil 0 10 to 0 40 mm (0 00394 to 0 0157 in )
2009 Toyota Tundra
2009 ENGINE Engine Mechanical (3UR-FBE) - Tundra
Fig. 110: Checking Piston Ring End Gap
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
Maximum end gap
MAXIMUM END GAP SPECIFICATION
If the end gap is more than the maximum, replace the piston ring If the end gap is more than the
maximum even with a new piston ring, replace the cylinder block
5
INSPECT PISTON SUB-ASSEMBLY WITH PIN
a
Using a micrometer, measure the piston diameter at a position that is 15 0 mm (0 591 in ) from the
bottom of the piston (refer to the illustration )
Standard diameter:
93.950 to 93.960 mm (3.6988 to 3.6992 in.)
Minimum diameter:
93.815 mm (3.6935 in.)
If the diameter is less than the minimum, replace the piston
Item Specified Condition
No 1 0 42 mm (0 0165 in )
No 2 0 55 mm (0 0217 in )
Oil 0 45 mm (0 0177 in )
2009 Toyota Tundra
2009 ENGINE Engine Mechanical (3UR-FBE) - Tundra
Fig. 111: Measuring Piston Diameter
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
6
INSPECT PISTON OIL CLEARANCE
a
Measure the cylinder bore diameter in the thrust direction
b
Subtract the piston diameter measurement from the cylinder bore diameter measurement
Standard oil clearance:
0.040 to 0.062 mm (0.00157 to 0.00244 in.)
Maximum oil clearance:
0.385 mm (0.0152 in.)
If the oil clearance is more than the maximum, replace all the pistons If necessary, replace the
cylinder block
7
INSPECT PISTON PIN OIL CLEARANCE
a
Check each mark on the piston, piston pin and connecting rod
2009 Toyota Tundra
2009 ENGINE Engine Mechanical (3UR-FBE) - Tundra
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