Replacement
1UR-FSE 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
SST : 09201-01055
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 (0.4049 to 0.4057 in.)
If the bush bore diameter of the cylinder head is between 10.285 to 10.306 mm (0.4049 to 0.4057 in.), proceed to the next step.
If the bush bore diameter of the cylinder head is 10.356 mm (0.4077 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:
(g) Heat the cylinder head to approximately 80 to 100°C (176 to 212°F).
(h) Using SST and a hammer, tap in a new guide bush to the specified protrusion height.
Standard protrusion height:
14.3 to 14.7 mm (0.563 to 0.579 in.)
SST : 09201-10000
SST : 09201-01055
SST : 09950-70010
09951-07100
(i) Using a sharp 5.5 mm reamer, ream the guide bush to obtain the standard specified clearance between the guide bush and valve stem.
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
SST : 09201-01055
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 (0.4049 to 0.4057 in.)
* If the bush diameter of the cylinder head is between 10.285 to 10.306 mm (0.4049 to 0.4057 in.), proceed to the next step.
* If the bush bore diameter of the cylinder head is 10.356 mm (0.4077 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:
(g) Heat the cylinder head to approximately 80 to 100°C (176 to 212°F).
(h) Using SST and a hammer, tap in a new guide bush to the specified protrusion height.
SST : 09201-10000
SST : 09201-01055
SST : 09950-70010
09951-07100
Standard protrusion height:
14.3 to 14.7 mm (0.563 to 0.579 in.)
(i) Using a sharp 5.5 mm reamer, ream the guide bush to obtain the specified clearance between the guide bush and valve stem.
3. REPLACE SPARK PLUG TUBE
HINT
When using a new cylinder head, the spark plug tubes must be replaced.
(a) Remove the spark plug tube.
(b) Apply adhesive to the end of a new spark plug tube.
Adhesive:
Toyota Genuine Adhesive 1324, Three Bond 1324 or equivalent
Standard seal diameter:
15 mm (0.591 in.)
NOTICE:
* Install the spark plug tube within 3 minutes after applying adhesive.
* Be careful not to deform the spark plug tube.
* Be careful not to expose the seal to coolant for at least 1 hour after installing it.
(c) Using a wooden block and hammer, tap in the spark plug tube to the specified protrusion height.
Standard protrusion height:
66.6 to 67.6 mm (2.62 to 2.66 in.)
NOTICE:
To avoid tapping in the spark plug tube too far, measure the protrusion height while tapping it.
4. 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 until the pin stops.
Standard protrusion:
