Replacement
3UR-FE ENGINE MECHANICAL: CYLINDER HEAD: REPLACEMENT
1. REPLACE INTAKE VALVE GUIDE BUSH
(a) Heat the cylinder head to approximately 80 to 100°C (176 to 212°F).
(b) Place the cylinder head on wooden blocks.
(c) Using SST and a hammer, tap out the valve guide bush.
SST : 09201-10000
09201-01050
SST : 09950-70010
09951-07100
(d) Using a caliper gauge, measure the bush bore diameter of the cylinder head side.
Standard cylinder bore diameter:
10.285 to 10.306 mm (0.405 to 0.406 in.)
If the bush bore diameter of the cylinder head is between 10.285 to 10.306 mm (0.405 to 0.406 in.), proceed to the next step.
If the bush bore diameter of the cylinder head is 10.356 mm (0.408 in.) or more, replace the cylinder head.
(e) Select a new guide bush (STD or O/S 0.05), and measure its diameter.
(f) Machine the bush bore diameter of the cylinder head side to the diameter of the selected guide bush.
Bush bore diameter:
Standard bush length:
41.3 to 41.7 mm (1.63 to 1.64 in.)
(g) Using SST and a hammer, tap in a new guide bush to the standard protrusion height.
SST : 09201-10000
09201-01050
SST : 09950-70010
09951-07100
Standard protrusion height:
14.3 to 14.7 mm (0.563 to 0.579 in.)
(h) Using a sharp 5.5 mm reamer, ream the guide bush to obtain the standard oil clearance between the guide bush and valve stem.
Standard oil clearance:
0.025 to 0.060 mm (0.000984 to 0.00236 in.)
2. REPLACE EXHAUST VALVE GUIDE BUSH
(a) Heat the cylinder head to approximately 80 to 100°C (176 to 212°F).
(b) Place the cylinder head on wooden blocks.
(c) Using SST and a hammer, tap out the valve guide bush.
SST : 09201-10000
09201-01050
SST : 09950-70010
09951-07100
(d) Using a caliper gauge, measure the bush bore diameter of the cylinder head.
Standard cylinder bore diameter:
10.285 to 10.306 mm (0.405 to 0.406 in.)
If the bush diameter of the cylinder head is between 10.285 to 10.306 mm (0.405 to 0.406 in.), proceed to the next step.
If the bush bore diameter of the cylinder head is 10.356 mm (0.408 in.) or more, replace the cylinder head.
(e) Select a new guide bush (STD or O/S 0.05), and measure its diameter.
(f) Machine the bush bore diameter of the cylinder head side to the diameter of the selected guide bush.
Bush bore diameter:
Standard bush length:
46.8 to 47.2 mm (1.84 to 1.86 in.)
(g) Using SST and a hammer, tap in a new guide bush to the standard protrusion height.
SST : 09201-10000
09201-01050
SST : 09950-70010
09951-07100
Standard protrusion height:
14.3 to 14.7 mm (0.563 to 0.579 in.)
(h) Using a sharp 5.5 mm reamer, ream the guide bush to obtain the standard oil clearance between the guide bush and valve stem.
Standard oil clearance:
0.030 to 0.065 mm (0.00118 to 0.00256 in.)
3. REPLACE RING PIN
NOTICE:
It is not necessary to remove the ring pin unless it is being replaced.
(a) Remove the ring pins.
(b) Using a plastic-faced hammer, tap in new ring pins to the cylinder head.
Standard protrusion:
