Last Modified: 11-29-2007 1.6 A
Service Category: Engine/Hybrid System Section: Engine Mechanical
Model Year: 2008 Model: Sequoia Doc ID: RM000002S5500FX
Title: 3UR-FE ENGINE MECHANICAL: CAMSHAFT: REMOVAL (2008 Sequoia)

REMOVAL

1. REMOVE TIMING CHAIN OR BELT COVER SUB-ASSEMBLY

(a) Remove the timing chain cover 3UR-FE LUBRICATION: OIL PUMP: REMOVAL (2008 Sequoia) .

2. SET NO. 1 CYLINDER TO TDC/COMPRESSION

(a) Temporarily tighten the pulley set bolt.

(b) Rotate the crankshaft clockwise so that the timing marks on the crankshaft timing gear and camshaft timing gears are as shown in the illustration.



HINT:

If the timing marks do not align, rotate the crankshaft clockwise again and align the timing marks.

3. REMOVE NO. 1 CHAIN TENSIONER ASSEMBLY (for LH Side)

(a) Move the stopper plate upward to release the lock, and push the plunger deep into the tensioner.

(b) Move the stopper plate downward to set the lock, and insert a hexagon wrench into the stopper plate hole.

(c) Remove the 2 bolts, chain tensioner and gasket.

4. REMOVE CHAIN TENSIONER SLIPPER (for LH Side)

5. REMOVE NO. 1 CHAIN VIBRATION DAMPER (for LH Side)

(a) Remove the 2 bolts and chain vibration damper.

6. REMOVE CHAIN SUB-ASSEMBLY (for LH Side)

(a) While pushing down the No. 3 chain tensioner, insert a pin of φ1.0 mm (0.0394 in.) into the hole to fix it in place.

(b) Hold the hexagonal portion of the camshaft with a wrench and loosen the bolt.

NOTICE:

  • Be careful not to damage the cylinder head with the wrench.
  • Do not disassemble the camshaft timing gear.


(c) Hold the hexagonal portion of the camshaft with a wrench and loosen the bolt.

NOTICE:

Be careful not to damage the cylinder head with the wrench.

(d) Remove the 2 bolts. Then with the No. 1 and No. 2 chains still connected to the gears, remove the camshaft timing gear, camshaft timing exhaust gear and crankshaft timing sprocket LH.

(e) Remove the No. 1 and No. 2 chains from the gears.

7. REMOVE NO. 3 CHAIN TENSIONER ASSEMBLY

(a) Remove the 2 bolts and chain tensioner.

8. REMOVE NO. 1 CHAIN TENSIONER ASSEMBLY (for RH Side)

(a) Move the stopper plate upward to release the lock, and push the plunger deep into the tensioner.

(b) Move the stopper plate downward to set the lock, and insert a hexagon wrench into the stopper plate hole.

(c) Remove the 2 bolts and chain tensioner.

9. REMOVE CHAIN TENSIONER SLIPPER (for RH Side)

10. REMOVE NO. 1 CHAIN VIBRATION DAMPER (for RH Side)

(a) Remove the 2 bolts and vibration damper.

11. REMOVE CHAIN SUB-ASSEMBLY (for RH Side)

(a) While raising up the No. 2 chain tensioner, insert a pin of φ1.0 mm (0.0394 in.) into the hole to fix it in place.

(b) Hold the hexagonal portion of the camshaft with a wrench and loosen the bolt.

NOTICE:

  • Be careful not to damage the cylinder head with the wrench.
  • Do not disassemble the camshaft timing gear.


(c) Hold the hexagonal portion of the camshaft with a wrench and loosen the bolt.

NOTICE:

Be careful not to damage the cylinder head with the wrench.

(d) Remove the 2 bolts. Then with the No. 1 and No. 2 chains still connected to the gears, remove the camshaft timing gear, camshaft timing exhaust gear and crankshaft timing sprocket RH.

(e) Remove the No. 1 and No. 2 chains from the gears.

12. REMOVE NO. 2 CHAIN TENSIONER ASSEMBLY

(a) Remove the 2 bolts and chain tensioner.

13. REMOVE CAMSHAFTS (for Bank 1)



(a) Make sure that the knock pin of the camshaft is positioned as shown in the illustration.

(b) Uniformly loosen and remove the 10 bearing cap bolts in the sequence shown in the illustration.

(c) Uniformly loosen and remove the 18 bearing cap bolts in the sequence shown in the illustration.

NOTICE:

Uniformly loosen the bolts while keeping the camshaft level.

(d) Remove the 6 bearing caps.

HINT:

Arrange the removed parts in the correct order.

(e) Remove the No. 3 and No. 4 camshafts.

14. REMOVE CAMSHAFT HOUSING SUB-ASSEMBLY LH

(a) Remove the camshaft housing by prying between the cylinder head and camshaft housing with a screwdriver.

NOTICE:

Be careful not to damage the contact surfaces of the cylinder head and camshaft housing.

HINT:

Tape the screwdriver tip before use.

15. REMOVE CAMSHAFTS (for Bank 2)



(a) Make sure that the knock pin of the camshaft is positioned as shown in the illustration.

(b) Uniformly loosen and remove the 10 bearing cap bolts in the sequence shown in the illustration.

(c) Uniformly loosen and remove the 18 bearing cap bolts in the sequence shown in the illustration.

NOTICE:

Uniformly loosen the bolts while keeping the camshaft level.

(d) Remove the 6 bearing caps.

HINT:

Arrange the removed parts in the correct order.

(e) Remove the No. 1 and No. 2 camshafts.

16. REMOVE CAMSHAFT HOUSING SUB-ASSEMBLY RH

(a) Remove the camshaft housing by prying between the cylinder head and camshaft housing with a screwdriver.

NOTICE:

Be careful not to damage the contact surfaces of the cylinder head and camshaft housing.

HINT:

Tape the screwdriver tip before use.