Honda Acura NSX 1991 Service Manual page 102

Cylinder Heads
NOTE: Engine removal is not required in this procedure.
CAUTION: To avoid damaging the cylinder heads, wait
until the coolant temperature drops below 38OC
before loosening the retaining bolts.
NOTE:
Inspect the timing belt before removing the
l
cylinder heads.
Turn the crankshaft so that the No. 1 piston is at
l
top-dead-center (page 6-25, 261.
them.
1. Disconnect the negative terminal from the battery.
2 . Remove the expansion tank cap.
Use care when removing the expansion
tank cap to avoid scalding by coolant or steam.
Raise the car.
3 .
4 . Remove the right rear wheel/tire.
5. Remove the engine under guard, then remove the
front exhaust pipe A.
6 . Remove the exhaust pipe A.
CAUTION: Do not use air wrench or hammer for
removing the exhaust pipe A and the catalytic con-
verter if the oxygen sensors are not to be removed.
SELF-LOCKING NUTS
mm
10 x 1.25
Replace.
6-28
GASKETS
Replace.
REAR EXHAUST
P I P E A
REAR EXHAUST
PIPE A
.
7. Remove the under cover, then remove the water
pipe drain bolts and drain the coolant.
8. Attach the hoses to front and rear engine drain
bolts, then loosen the bolts and drain the
coolant.
ing the cylinder heads (page 10-5).
CAUTION: Failure to comply with the bleeding
procedure could cause
may result in severe engine damage.
9. Remove the engine oil cooler base assembly (page
6-23).
IO. Lower the car.
11. Remove the strut bar (Page 5-I 9).
12. Remove the intake manifold plate and top cover
(page 5-21).
13. Remove the throttle cable by loosening the locknut,
then slip the cable and nut off the throttle bracket
and throttle link (page 5-21).
NOTE:
it. Always replace a kinked cable with new one.
Adjust throttle cable when installing (See Section
l
11).
SELF-LOCKING NUTS
10 x 1.25 mm
Replace.
Replace.
imperfect bleeding, which