2008 Honda odyssey cylinder head replacement?

Cylinder Head Replacement.

Removal & Installation

The details are as follows.

J35a6 Engine

Specific to:

Honda Odyssey 2007-2008

NOTE

The engine coolant temperature must be below 100°F (38°C) before removing the head bolts.

1. Make sure that you have the anti-theft codes for the radio and navigation system.
2. Relieve the fuel system pressure.
3. Disconnect the battery ground.
4. Remove the accessory drive belt.
5. Drain the coolant.
6. Remove the power steering pump and the hose bracket.
7. Remove the alternator.
8. Remove the timing belt.
9. Remove the intake manifold.
10. Remove the ignition coils.
11. Tag and disconnect all wiring from the head.
12. Remove the front and rear warm-up converters.
13. Disconnect the fuel feed line.
14. Remove the wiring harness bracket.
15. Remove the upper and lower radiator hoses.
16. Remove the heater and bypass hoses.
17. Remove the EVAP canister hose joint bracket.
18. Remove the harness brackets from the front and rear heads.
19. Remove the fuel rail.
20. Remove the water passage assembly.
21. Remove the camshaft pulley.
22. Remove the cylinder head cover.
23. Remove the head bolts in the sequence shown ¹ / ₃ turn at a time. 
    
    
    

    

    Fig. Cylinder head bolt removal sequence-J35A6 engine
24. Remove the head.

To install:

1. Clean all mating surfaces thoroughly.
2. Clean and install the oil control orifices with new O-rings.
3. Install the dowel pins and a new head gasket.
4. Set the crankshaft pulley to TDC by aligning the TDC mark (A) with the pointer (B). See the Timing Belt Procedure.
5. Set the camshaft pulley(s) to TDC by aligning the mark (A) with the pointer (B). See the Timing Belt Procedure.
6. Coat the threads and flanges of head bolts with clean engine oil.
   
   WARNING

   There are 2 types of head bolts in service, 6-point and 12-point. Do not mix them on the same head.
   
   
   
   NOTE

   There are 2 different tightening methods based on which type of head bolt is used.
   
   
   
   WARNING

   When tightening the bolts, tighten them slowly. If any bolt makes a noise while tightening, loosen the bolt and retighten from Step 1.
   
   
   
   
   

   

   Fig. Head bolt torque sequence-J35A6 engine
   1. Step 1: Torque all bolts in sequence to 22 ft. lbs.
   2. Step 2: Torque all bolts in sequence an additional 90°
   3. Step 3: Torque all bolts in sequence an additional 90°
      
      
      If new bolts are used, torque them in sequence an additional 90°
7. The remainder of installation is the reverse of removal. Note the following torques:
   
   
   Water passage 8mm bolts: 16 ft. lbs. (22 Nm)

   Water passage 6mm bolts: 105 inch lbs. (12 Nm)

   Front head bracket 10mm bolt: 33 ft. lbs. (44 Nm)

   Rear head bracket 8mm bolt: 16 ft. lbs. (22 Nm)

   EVAP canister joint bracket: 105 inch lbs. (12 Nm)

   Power steering pump bolts: 16 ft. lbs. (22 Nm)

J35a7 Engine

Specific to:

Honda Odyssey 2007-2008

NOTE

The engine coolant temperature must be below 100°F (38°C) before removing the head bolts.

1. Make sure that you have the anti-theft codes for the radio and navigation system.
2. Relieve the fuel system pressure.
3. Disconnect the battery ground.
4. Remove the accessory drive belt.
5. Drain the coolant.
6. Remove the power steering pump and the hose bracket.
7. Remove the alternator.
8. Remove the timing belt.
9. Remove the intake manifold.
10. Remove the ignition coils.
11. Tag and disconnect all wiring from the head.
12. Remove the front and rear warm-up converters.
13. Disconnect the fuel feed line.
14. Remove the wiring harness bracket.
15. Remove the upper and lower radiator hoses.
16. Remove the heater and bypass hoses.
17. Remove the EVAP canister hose joint bracket.
18. Remove the harness brackets from the front and rear heads.
19. Remove the fuel rail.
20. Remove the water passage assembly.
21. Remove the camshaft pulley.
22. Remove the cylinder head cover.
23. Remove the head bolts in the sequence shown ¹ / ₃ turn at a time. 
    
    
    

    

    Fig. Front cylinder head bolt removal sequence-J35A7 engine
    
    
    
    

    

    Fig. Rear cylinder head bolt removal sequence-J35A7 engine
24. Remove the head.

To install:

1. Clean all mating surfaces thoroughly.
2. Clean and install the oil control orifices with new O-rings.
3. Install the dowel pins and a new head gasket.
4. Set the crankshaft pulley to TDC by aligning the TDC mark (A) with the pointer (B). See the Timing Belt Procedure.
5. Set the camshaft pulley(s) to TDC by aligning the mark (A) with the pointer (B). See the Timing Belt Procedure.
6. Coat the threads and flanges of head bolts with clean engine oil.
   
   WARNING

   When tightening the bolts, tighten them slowly. If any bolt makes a noise while tightening, loosen the bolt and retighten from Step 1.
   
   
   
   
   

   

   Fig. Front head bolt torque sequence-J35A7 engine
   
   
   
   

   

   Fig. Rear head bolt torque sequence-J35A7 engine
7. Tighten the bolts, in sequence, in 3 steps. Perform each step twice.
   1. Step 1: 22 ft. lbs. (29 Nm)
   2. Step 2: Torque all bolts in sequence an additional 90°
   3. Step 3: Torque all bolts in sequence an additional 90°
8. The remainder of installation is the reverse of removal. Note the following torques:
   
   
   Water passage 8mm bolts: 16 ft. lbs. (22 Nm)

   Water passage 6mm bolts: 105 inch lbs. (12 Nm)

   Front head bracket 10mm bolt: 33 ft. lbs. (44 Nm)

   Rear head bracket 8mm bolt: 16 ft. lbs. (22 Nm)

   EVAP canister joint bracket: 105 inch lbs. (12 Nm)

   Power steering pump bolts: 16 ft. lbs. (22 Nm)

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This details will help you.

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