Acura RL (1996-2004 year). Manual — part 335
Rocker Arm Assembly
Disassembly/Reassembly
NOTE:
Refer to page
for rocker arm assembly removal.
Identify parts as they are removed to ensure reinstallation in original locations.
Inspect rocker shafts and rocker arms (see page
).
Rocker arms must be installed in the same position if reused.
When removing or installing the rocker arm assembly, do not remove the camshaft holder bolts. The bolts will keep the
holders, springs and rocker arms on the shaft.
INTAKE ROCKER
SHAFT C
INTAKE ROCKER
SHAFT B
(2 places)
INTAKE
ROCKER
SHAFT A
INTAKE ROCKER
ARM A
(3 places)
WAVE WASHER
(4 places)
CAMSHAFT
HOLDER
L-5 is similar
to R-1
CAMSHAFT
HOLDER
L-1 is similar
to R-5
EXHAUST ROCKER
SHAFT
HYDRAULIC
TAPPET
EXHAUST
ROCKER ARM B
(3 places)
ROCKER ARM
O-RING
Replace.
INTAKE ROCKER ARM A
INTAKE ROCKER ARM B
EXHAUST ROCKER ARM A
EXHAUST ROCKER ARM B
Letter "A" is stamped
on rocker arm.
Letter "B" is stamped
on rocker arm.
Letter "A" is stamped
on rocker arm.
Letter "B" is stamped
on rocker arm.
L: Left
R: Right
INTAKE ROCKER
ARM SPRING
(2 places)
INTAKE ROCKER
ARM B
(3 places)
EXHAUST ROCKER
ARM SPRING
(2 places)
CAMSHAFT
HOLDER
L-2 is similar
to R-4
CAMSHAFT
HOLDER
L-3 is similar
to R-3
EXHAUST
ROCKER ARM A
(3 places)
NOTE: Do not remove
the hydraulic tappet
from the rocker arm except
when replacing.
\
CAMSHAFT
HOLDER
L-4 is similar
to R-2
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Rocker Arm Assembly
Removal
NOTE:
• To prevent damage to the valves or rocker arm assem-
bly, unscrew the camshaft holder bolts two turns at a
time in a crisscross pattern.
• When removing the rocker arm assembly, do not
remove the camshaft holder bolts. The bolts will keep
the camshaft holders, the springs and the rocker arms
on the shafts.
CAMSHAFT HOLDER BOLTS LOOSENING SEQUENCE:
when installing.
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Camshaft
Inspection
NOTE:
• Do not rotate the camshaft during inspection.
• Remove the rocker arms and rocker shafts.
1. Put the camshaft and the camshaft holders on the
cylinder head, then tighten the bolts to the specified
torque.
Specified torque:
8 mm bolts: 22 N-m (2.2 kgf-m, 16 Ibf-ft)
6 mm bolts: 12 N-m (1.2 kgf-m, 8.7 Ibf-ft)
8 mm bolts:
2. Seat the camshaft by pushing it toward the rear of
the cylinder head.
3. Zero the dial indicator against the rear of the cam-
shaft. Push the camshaft back and forth, and read
the end play.
Camshaft End Play:
Standard (New): 0.05 - 0.15 mm
(0.002 - 0.006 in)
Service Limit: 0.15 mm (0.006 in)
CAMSHAFT
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4. Remove the bolts, then remove the camshaft hold-
ers from the cylinder head.
5. Lift the camshaft out of the cylinder head, wipe it
clean, then inspect the lift ramps. Replace the
camshaft if any lobes are pitted, scored, or excessively
worn.
6. Clean the camshaft bearing surfaces in the cylinder
head, then set the camshaft back in place.
7. Place a plastigage strip across each journal.
8. Install the camshaft holders, then tighten the bolts
to the specified torque shown on the previous page.
9. Remove the camshaft holders. Measure the widest
portion of plastigage on each journal.
PLASTIGAGE STRIP
If camshaft-to-holder oil clearance is out of toler-
ance:
And the camshaft has already been replaced,
you must replace the cylinder head.
If the camshaft has not been replaced, first check
the total runout with the camshaft supported on
V-blocks.
Rotate camshaft
while measuring.
If the total runout of the camshaft is within toler-
ance, replace the cylinder head.
If the total runout is out of tolerance, replace the
camshaft and recheck. If the oil clearance is still
out of tolerance, replace the cylinder head.
11. Check cam lobe height wear.
Check this area for wear.
Cam Lobe Height Standard (New):
INTAKE 40.175 mm (1.5817 in)
EXHAUST 37.878 mm (1.4913 in)
Camshaft Total Runout:
Standard (New): 0.03 mm (0.001 in) max.
Service Limit: 0.04 mm (0.002 in)
Camshaft-to-Holder Oil Clearance:
Standard (New): 0.050 - 0.089 mm
(0.0020 - 0.0035 in)
Service Limit: 0.10 mm (0.004 in)
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