Acura NSX 1997 Service Manual page 159

Main Menu
Radiator
Engine Coolant Refilling and Bleeding (cont'd)
6. Install rubber hoses on the drain bolts at the front
and rear of the engine under the cylinder banks.
Loosen the drain bolts to drain the coolant.
• Draining can be done more quickly if all the bleed
bolts and plug are also opened. Before opening
them, make sure the coolant level in the expan-
sion tank has come down completely so that the
coolant will not pour out of the bleed bolts and
plug.
7. When the coolant stops draining, tighten the
radiator drain plug, water pipe drain bolts and
engine drain bolts.
• Be sure to replace the water pipe drain bolt
washers with new ones.
Table of Contents
REAR ENGINE DRAIN BOLT
9.8 N-m (1.0 kgf-m, 7.2 Ibf-ft)
8. Open all four bleeders.
1) Loosen the radiator bleed plug.
2) Remove the heater pipe bleed bolt.
3) Loosen the water pipe bleed bolt.
4) Loosen the engine bleed bolt on the thermo
cover.
9. Mix the recommended antifreeze/coolant with an
equal amount of water in a clean container.
NOTE:
• Always use Genuine Honda Antifreeze/Coolant.
Using a non-Honda coolant can result in corro-
sion, causing the cooling system to malfunction
or fail.
• For best corrosion protection, the coolant con-
centrations must be maintained year-round at
50% minimum. Coolant concentrations less than
50% may not provide sufficient protection
against corrosion or freezing.
• Coolant concentrations greater than 60% will
impair cooling efficiency and are not recom-
mended.
CAUTION:
• Do not mix different brands of antifreeze/coolant.
• Do not use additional rust inhibitors or anti-rust
products; they may not be compatible with the
recommended coolant.
Engine Coolant Refill Capacity: Including expansion
tank 2.1 (2.2 US qt, 1.8 Imp qt)
Manual: 12.0 (12.7 US qt, 10.6 Imp qt)
Automatic: 12.0 (12.7 US qt, 10.6 Imp qt)
FRONT ENGINE DRAIN BOLT
9.8 N-m (1.0 kgf-m, 7.2 Ibf-ft)