Honda Acura NSX 1991, Service Manual

Page: 96 / 1420

Timing Belt
Inspection
1 .
Remove the ignition coil covers and harness clamps.
2 . Disconnect the connectors, then remove the ignition
coils.
NOTE:
3. Remove the cylinder head covers.
4 . Inspect the timing belt for cracks and oil soaking.
NOTE:
Replace the belt if oil soaked.
Remove any oil or solvent that gets on the belt.
Inspect this area
for wear.
Rotate pulley and
Inspect belt.
Tension Adjustment
CAUTION:
l
Always adjust timing belt tension with the engine cold.
l
Do not rotate the crankshaft when adjusting bolt is
loose (the timing belt will skid over the teeth of the
rear intake cam pulley).
Never adjust the belt tension on any other occasion
than when the belt is removed for belt or parts
replacement.
NOTE:
l Tensioner is spring-loaded to apply proper tension to
the belt automatically after making the following ad-
justment.
Inspect the timing belt before adjusting the belt
tension.
l Always rotate the crankshaft clockwise. Rotating it
counterclockwise may result in improper adjustment
of the belt tension.
1.
Install the timing belt with the No. 1 piston at TDC
(page 6-25,
Fix the crankshaft, remove the slack in the sequence
of
and by turning each cam pulley.
3 . Loosen the timing belt adjusting bolt 1 (the slack
at should be eliminated).
Then, tighten the timing belt adjusting bolt.
Set the No. 1 piston at TDC (page
5. Rotate the crankshaft clockwise g-teeth on camshaft
pulley (The blue mark on crankshaft pulleys should
be line up with the pointer on lower cover).
6. Loosen the timing belt adjusting bolt.
7 .
Retighten the adjusting bolt torque to 43 (4.3
kg-m, 31
POINTER ON
LOWER COVER
ADJUSTING BOLT
(4.3 kg-m,
6-22