Categories
Cooling

nsxb10005a.pdf

Engine Coolant Refilling and Bleeding
CAUTION: When pouring engine coolant, be sure to
shut the relay box lid and not let coolant spill on the
electrical parts or the paint. If any coolant spills, rinse it
off immediately.
NOTE:
• Perform this maintenance when the engine is cool.
• Before replacing the coolant, turn the ignition ON,
slowly turn the climate control temperature knob to
90° and turn off the ignition. This will allow the
coolant in the heater to drain out with the rest of the
system.
1. Open the hood, the rear window and the engine
cover.
2. Remove the cover protecting the water pipes and
shift cables on the underside of the car.
3. Before removing the expansion tank cap, first
loosen the cap to lower pressure.
CAUTION: Do not remove the expansion tank cap
when engine is hot. The coolant is under pressure
and may blow out and scald you. Open the cap
slowly when the engine is cool.
4. Loosen the drain plug in the bottom of the radiator,
and drain the coolant.
5. Remove the two drain bolts from the water pipes,
and drain the coolant.
WASHERS
Replace.
DRAIN BOLTS
15 N-m (1.5 kg-m, 11 Ib-ft)
DRAIN HOLE
DRAIN PLUG

Radiator
Engine Coolant Refilling and Bleeding
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.
REAR ENGINE DRAIN BOLT
30 N-m (3.0 kg-m, 22 Ib-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:
• Use only Honda-recommended anti-freeze/
coolant.
• 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 anti-
freeze/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
30 N-m (3.0 kg-m, 22 Ib-ft)

10. Fill the expansion tank with engine coolant. As
coolant starts to run out in a steady stream without
bubbles, tighten the bleeders in sequence: thermo
cover bleed bolt, radiator bleed plug, heater pipe
bleed and water pipe bleed bolt.
11. After tightening all the bleeding bolts and plug, fill
the expansion tank with coolant up to the MAX line.
12. Loosen the thermo cover bleed bolt to remove any
remaining air.
13. When bleeding is completed, retighten the thermo
cover bleed bolt and fill the expansion tank up to
0.5 (0.53 US qt, 0.44 Imp qt) or 30 mm (1.2 in)
over the MAX line.
14. Install the expansion tank cap, and turn it 60 degrees
(where it engages the first lock tab of filler neck).
1 5. Start the engine, and let it run until warmed up (until
the thermostat opens and the radiator cooling fan
runs).
16. Turn off the engine. Check the expansion tank and,
if needed, add engine coolant to bring it up to the
MAX line.
17. Tighten the expansion tank cap securely.
18. Reinstall the cover on the car’s underside.
THERMO COVER
BLEED PLUG
RADIATOR UPPER
TANK
HEATER PIPE
BLEED BOLT
10 N-m (1.0 kg-m,
7 Ib-ft)
BLEED BOLT
10 N-m (1.0 kg-m,
7 Ib-ft)
BLEED BOLT
10 N-m (1.0 kg-m,
7 Ib-ft)

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