| Last Modified: 11-29-2007 | 1.6 A | |
| Service Category: Engine/Hybrid System | Section: Engine Mechanical | |
| Model Year: 2008 | Model: Sequoia | Doc ID: RM00000307C003X |
| Title: 2UZ-FE ENGINE MECHANICAL: CYLINDER HEAD: REPLACEMENT (2008 Sequoia) | ||
REPLACEMENT
1. REPLACE INTAKE VALVE GUIDE BUSH
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(a) Gradually heat the cylinder head to approximately 80 to 100°C (176 to 212°F). |
(b) Place the cylinder head on wooden blocks.
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(c) Using SST and a hammer, tap out the guide bush. SST: 09201-01055 SST: 09950-70010 09951-07100 |
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(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 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. |
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(e) Select a new guide bush (STD or O/S 0.05). HINT:
Different bushes are used for the intake and exhaust. Standard Bush Length:
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(f) Machine the bush bore diameter of the cylinder head side to the diameter of the selected guide bush.
Bush Bore Diameter:
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Bush Size |
Specified Condition |
|---|---|
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Use STD |
10.285 to 10.306 mm (0.405 to 0.406 in.) |
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Use O/S 0.05 |
10.335 to 10.356 mm (0.407 to 0.408 in.) |
(g) Gradually heat the cylinder head to approximately 80 to 100°C (176 to 212°F).
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(h) Using SST and a hammer, tap in a new guide bush to the specified protrusion height. SST: 09201-01055 SST: 09950-70010 09951-07100 Standard protrusion height: 9.2 to 9.8 mm (0.362 to 0.386 in.) |
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(i) Using a sharp 5.5 mm reamer, ream the guide bush to obtain the standard 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
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(a) Gradually 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 guide bush. SST: 09201-01055 SST: 09950-70010 09951-07100 |
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(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 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. |
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(e) Select a new guide bush (STD or O/S 0.05). HINT:
Different bushes are used for the intake and exhaust. Standard Bush Length:
|
(f) Machine the bush bore diameter of the cylinder head side to the diameter of the selected guide bush.
Bush Bore Diameter:
|
Bush Size |
Specified Condition |
|---|---|
|
Use STD |
10.285 to 10.306 mm (0.405 to 0.406 in.) |
|
Use O/S 0.05 |
10.335 to 10.356 mm (0.407 to 0.408 in.) |
(g) Gradually 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: 09950-70010 09951-07100 Standard protrusion height: 8.2 to 8.8 mm (0.323 to 0.346 in.) |
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(i) Using a sharp 5.5 mm reamer, ream the guide bush to obtain the standard 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 SPARK PLUG TUBE
HINT:
When using a new cylinder head, the spark plug tubes must be replaced.
(a) Remove the spark plug tubes.
(b) Apply adhesive to the end of a new spark plug tube.
Standard seal diameter:
15 mm (0.591 in.)
Adhesive:
Toyota Genuine Adhesive 1324, Three Bond 1324 or equivalent.
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.
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(c) Using a wooden block and hammer, tap in the spark tube. Standard protrusion: 40.9 to 42.1 mm (1.61 to 1.66 in.) NOTICE:
To avoid tapping in a new 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 pin.
(b) Using a plastic-faced hammer, tap in new ring pins until they stop.
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