Acura RL. Manual - part 425

Fig. 133: Identifying Back Cover And Camshaft Pulley With Torque Specifications
Courtesy of AMERICAN HONDA MOTOR CO., INC.

CYLINDER HEAD INSTALLATION

1. Clean the cylinder head and block surface.

2. Clean and install the oil control orifices (A) with new O-rings (B).

Fig. 134: Identifying Oil Control Orifices, Dowel Pins And O-Rings
Courtesy of AMERICAN HONDA MOTOR CO., INC.

3. Install the dowel pins (C) and new cylinder head gaskets (D).

4. Clean the timing belt pulleys.

5. Set the timing belt drive pulley to top dead center (TDC) by aligning the TDC mark (A) on the tooth

of the timing belt drive pulley with the pointer (B) on the oil pump.

2007 Acura RL

2005-08 ENGINE Cylinder Head - RL

Friday, June 05, 2009 3:18:37 PM

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Fig. 135: Aligning TDC Mark On Tooth Of Timing Belt Drive Pulley With Oil Pump Pointer
Courtesy of AMERICAN HONDA MOTOR CO., INC.

6. Set the camshaft pulleys to TDC by aligning the TDC marks (A) on the camshaft pulleys with the

pointers (B) on the back covers.

FRONT

Fig. 136: Aligning TDC Marks On Camshaft Pulleys With Back Covers Pointers (Front)
Courtesy of AMERICAN HONDA MOTOR CO., INC.

REAR

2007 Acura RL

2005-08 ENGINE Cylinder Head - RL

Friday, June 05, 2009 3:18:37 PM

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Fig. 137: Aligning TDC Marks On Camshaft Pulleys With Back Covers Pointers (Rear)
Courtesy of AMERICAN HONDA MOTOR CO., INC.

7. Install the cylinder heads on the engine block.

8. Install the cylinder head bolts:



6 point cylinder head bolt: Go to step 9



12 point cylinder head bolt: Go to step 11

Tightening sequence for 6 point cylinder head bolts

9. Apply new engine oil to the threads and flanges of the cylinder head bolts.

10. Tighten the cylinder head bolts sequentially in three steps.

1st Step Torque: 39 N.m (4.0 kgf.m, 29 lbf.ft)

2nd Step Torque: 69 N.m (7.0 kgf.m, 51 lbf.ft)

3rd Step Torque: 98.1 N.m (10.0 kgf.m, 72.3 lbf.ft)

Use a beam-type torque wrench. When using a preset-type torque wrench, be sure to tighten slowly
and not to overtighten. If a bolt makes any noise while you are torquing it, loosen the bolt, and
retighten it from the first step.

Fig. 138: Identifying Tightening Sequence Of Cylinder Head Bolts
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Tightening sequence for 12 point cylinder head bolts

11. Measure the diameter of each cylinder head bolt at point A and point B.

NOTE:

Head bolt types must be all the same type on the cylinder head. Do not
mix head bolt types.

NOTE:

Perform each step twice.

2007 Acura RL

2005-08 ENGINE Cylinder Head - RL

Friday, June 05, 2009 3:18:37 PM

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Fig. 139: Identifying Diameter Of Cylinder Head Bolt (Checking Bolt Stretch)
Courtesy of AMERICAN HONDA MOTOR CO., INC.

12. If either diameter is less than 11.3 mm (0.44 in.), replace the cylinder head bolt.

13. Apply new engine oil to the threads and under the bolt heads of all cylinder head bolts.

14. Tighten the cylinder head bolts in sequence to 29 N.m (3.0 kgf.m, 22 lbf.ft). Use a beam-type torque

wrench. When using a preset-type torque wrench, be sure to tighten slowly and do not overtighten. If
a bolt makes any noise while you are torquing it, loosen the bolt and retighten it from the first step.

Fig. 140: Identifying Tightening Sequence Of Cylinder Head Bolts
Courtesy of AMERICAN HONDA MOTOR CO., INC.

15. After torquing, tighten all cylinder head bolts in two steps (90° per step). If you are using a new

cylinder head bolt, tighten the bolt an extra 90°.

NOTE:

Remove the cylinder head bolt if you tightened it beyond the specified
angle, and go back to step 11 of the procedure. Do not loosen it back to
the specified angle.

2007 Acura RL

2005-08 ENGINE Cylinder Head - RL

Friday, June 05, 2009 3:18:37 PM

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