Acura RL (1996-2004 year). Manual — part 356
Cap Testing
Testing
1. Remove the radiator cap, wet its seal with engine
coolant, then install it on the pressure tester.
RADIATOR
CAP
2. Apply a pressure of 93- 123 kPa (0.95- 1.25 kgf/cm
2
,
14-18 psi).
3. Check for a drop in pressure.
4. If the pressure drops, replace the cap.
1. Wait until the engine is cool, then carefully remove
the radiator cap and fill the radiator with engine
coolant to the top of the filler neck.
2. Attach the pressure tester to the radiator and apply
a pressure of 93-123 kPa (0.95 - 1.25 kgf/cm
2
, 14 -
18 psi).
RADIATOR PRESSURE
TESTER
(Commercially available)
3. Inspect for engine coolant leaks and a drop in pres-
sure.
4. Remove the tester and reinstall the radiator cap.
NOTE: Check for engine oil in the coolant and/or
coolant in the engine oil.
RADIATOR PRESSURE TESTER
(Commercially available)
SMALL ADAPTOR
(for 32 mm neck, low profile)
SMALL ADAPTOR
(for 32 mm neck, low profile)
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Thermostat
Replacement
NOTE: Use new O-rings when reassembling.
BLEED BOLT
9.8 N-m (1.0 kgf-m,
7.2 Ibf-ft)
ENGINE COOLANT
TEMPERATURE
(ECT) GAUGE
SENDING UNIT
9 N-m (0.9 kgf-m,
7 Ibf-ft)
ENGINE COOLANT
TEMPERATURE
(ECT) SENSOR
18 N-m (1.8 kgf-m, 13 Ibf-ft)
THERMOSTAT
COVER
O-RING
Replace.
THERMOSTAT
Install with pin up.
RUBBER SEAL
Replace.
6 x 1.0 mm
12 N-m (1.2 kgf-m,
8.7 Ibf-ft)
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Testing
Replace the thermostat if it is open at room temperature.
To test a closed thermostat:
1. Suspend the thermostat in a container of water as
shown.
THERMOMETER
THERMOSTAT
2. Heat the water, and check the temperature with a
thermometer. Check the temperature at which the
thermostat first opens, and at which it is fully open.
CAUTION: Do not let the thermometer touch the
bottom of the hot container.
3. Measure lift height of the thermostat when it is fully
open.
STANDARD THERMOSTAT
Lift height: above 10.0 mm (0.39 in)
Starts opening: 169° - 176°F (76°- 80°C)
Fully open: 194°F (90°C)
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Water Pump
Illustrated Index
NOTE:
Use new O-rings when reassembling.
Use liquid gasket, Part No. 08718 - 0001 or 08718 - 0003.
ENGINE COOLANT
BLEED BOLT TEMPERATURE
9.8 N-m (1.0 kgf-m, (ECT) SENSOR
7.2 Ibf-ft) 18 N-m (1.8 kgf-m, 13 Ibf-ft)
ENGINE COOLANT
TEMPERATURE
(ECT) GAUGE
SENDING UNIT
9 N-m (0.9 kgf-m,
7 Ibf-ft)
6 x 1.0 mm
12 N-m (1.2 kgf-m, 8.7 Ibf-ft)
8 x 1.25 mm
22 N-m (2.2 kgf-m, 16 Ibf-ft)
WATER
PASSAGE
INTAKE
MANIFOLD
THROTTLE
BODY
O-RINGS
Replace.
WATER BYPASS
PIPE
O-RING
Replace.
THERMOSTAT
HOUSING
ASSEMBLY
6 x 1.0 mm
12 N-m (1.2 kgf-m,
8.7 Ibf-ft)
6 x 1.0 mm
12 N-m (1.2 kgf-m,
8.7 Ibf-ft)
REAR WATER OUTLET
Apply liquid gasket
to the cylinder head
mating surface.
CONNECTING
PIPE
8 x 1.25 mm
22 N-m (2.2 kgf-m, 16 Ibf-ft)
DOWEL
PIN
8 x 1.25 mm
22 N-m (2.2 kgf-m,
16 Ibf-ft)
O-RING
Replace.
WATER PUMP
GASKETS
Replace.
O-RING
Replace.
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