Acura NSX 1991 Manual page 89

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Timing Belt
Inspection
1. Remove the ignition coil covers and harness clamps.
2. Disconnect the connectors, then remove the ignition
coils.
3. Remove the cylinder head covers,
4. Inspect the timing belt for cracks and coolant or oil
soaking.
NOTE:
Replace the belt if coolant or oil soaked.
Remove any oil or solvent that gets on the belt.
Inspect this area
for wear.
Rotate pulley and
Inspect belt.
Table of Contents
Tension Adjustment
CAUTION:
Always adjust timing belt tension with the engine cold
Do not rotate the crankshaft when the adjusting bolt
is loose (the timing belt will skid over the teeth of
the rear intake caimshaft pulley).
Adjust the belt tension only when the belt has been
removed and reinstalled or replaced.
NOTE:
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.
Always rotate the crankshaft clockwise. Rotating it
counterclockwise may result in improper adjustment
of the belt tension or cause the belt to jump a tooth
on the camshaft pulleys.
Install the timing beIt with the No. 1 piston at TDC
(see pages 6-18 ('91-'93)
or ('94-'96)
Remove the slack in the sequence of
by turning each camshaft pulley slightly.
Loosen the timing belt adjusting bolt 180° (the slack
at should be eliminated).
Then, tighten the timing belt adjusting bolt.
Verify that No. 1 piston is at TDC (see page 6-19).
Rotate the crankshaft clockwise nine teeth on the
camshaft pulley (The blue mark on the crankshaft pul-
ley should line up with the pointer on lower cover).
Loosen the timing belt adjusting bolt.
Retighten the adjusting bolt, torque to 43 N·m (4.3
kg-m, 31 Ib-fl).
Direction
of rotation
POINTER ON
LOWER COVER
or ('94-'96),19 ('91-'93)
, and
ADJUSTING BOLT
43N·m (4.3 kg-m,
31 Ib-ft)
BLUE MARK
TDC MARK