Honda S2000 2000-2004 AP1: Lubrication System

Honda S2000

OIL PRESSURE SWITCH TEST

1. Remove the YEL/RED wirefrom the engine oil pressure switch.
2. Check for continuity between the positive terminal and the engine (ground). There should be continuity with the engine stopped. There should be no continuity with the engine running.
3. If the switch fails to operate, check the engine oil level. If the engine oil level is OK, check the engine oil pressure.

OIL PRESSURE TEST

If the oil pressure indicator light stays on with the engine running, check the engine oil level. If the oil level is correct, continue with test.

1. Connect a tachometer.
2. Remove the engine oil pressure switch, and install an oil pressure gauge.
3. Start the engine. Shut it off immediately if the gauge registers no oil pressure. Repair the problem before continuing.
4. Allow the engine to reach operating temperature (fan comes on at least twice). The pressure should be:

Engine Oil Temperature: 176°F (80°C)
Engine Oil Pressure:

• At Idle: 250 kPa (2.5 kgf/cm2 , 36 psi) minimum
• At 3,000 rpm: 590 kPa (6.0 kgf/cm2 , 85 psi) minimum

5. If oil pressure is NOT within specifications, inspect these items:

• Check the oil filter for clogging.
• Inspect the oil pump

ENGINE OIL REPLACEMENT

Under normal conditions, the oil filter should be replaced at every other oil change. Under severe conditions, the oil filter should be replaced at each oil change.

Change interval:

• Every 7,500 miles (12,000 km) or 12 months (Normal conditions).
• Every 3,750 miles (6,000 km) or 6 months (Severe conditions).

1. Warm up the engine.
2. Remove the drain bolt, and drain the engine oil.
3. Reinstall the drain bolt with a new washer.
4. Refill with the recommended oil.

Capacity

• 4.5 l (4.8 US qt) at oil change.
• 4.8 l (5.1 US qt) at oil change including filter.
• 5.6 l (5.9 US qt) after engine overhaul.

5. Run the engine for more than 3 minutes, then check for oil leakage.

OIL FILTER REPLACEMENT

SPECIAL TOOLS REQUIRED: Oil Filter Wrench 07912-6110001
1. Remove the oil filter with the special tool.
2. Inspect the threads and rubber seal on the new filter. Wipe off the seat on the engine block, then apply a light coat of new engine oil to the filter rubber seal. Use only filters with a built-in bypass system.
3. Install the oil filter by hand.
4. After the rubber seal seats, tighten the oil filter clockwise with the special tool.

• Tighten: 7/8 turn clockwise.
• Tightening torque: 22 N.m (2.2 kgf.m, 16 lbf.ft)

5. If eight numbers (1 to 8) are printed around the outside of the filter, use the following procedure to tighten the filter.

• Spin the filter on until its seal lightly seats against the engine oil cooler, and note which number is at the bottom.
• Tighten the filter by turning it clockwise seven numbers from the one you noted. For example, if number 2 is at the bottom when the seal is seated, tighten the filter until the number 1 comes around the bottom.

6. After installation, fill the engine with oil up to the specified level, run the engine for more than 3 minutes, then check for oil leakage.

OIL JET INSPECTION

1. Remove the oil jet, and inspect it as follows.

• Make sure that a 1.5 mm (0.06 in.) diameter drill will go through the nozzle hole (1.6 mm (0.06 in.) diameter).
• Insert the end of a 1.1 mm (0.04 in.) drill into the oil intake (1.2 mm (0.05 in.) diameter).
• Make sure the check ball moves smoothly and has a stroke of approximately 4.0 mm (0.16 in.).
• Check the oil jet operation with an air nozzle. It should take at least 200 kPa (2.0 kgf/cm2 , 28 psi) to unseat the check ball.

FYI: Replace the oil jet assembly if the nozzle is damaged or bent.

Removing Oil Jet

2. The mounting torque is critical. Be very precise when installing the oil jet.
Torque: 16 N.m (1.6 kgf.m, 12 lbf.ft)

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HONDA S2000 OIL PUMP OVERHAUL

Honda S2000 oil pump

Removal

1. Remove the cam chain
2. Remove the oil pump chain tensioner.
3. Remove the baffle plate.
4. Remove the three bolts securing the oil pump.
5. Remove the oil pump oil pump chain, and crankshaft sprocket.
6. Inspection : Remove the pump cover.
7. Check the inner-to-outer rotor radial clearance between the inner rotor and outer rotor. If the inner-to-outer rotor radial clearance exceeds the service limit, replace the outer rotor and oil pump housing.

• Inner Rotor-to-Outer Rotor Radial Clearance Standard (New): 0.02-0.15 mm (0.001-0.006 in.)
• Service Limit: 0.20 mm (0.008 in.)

8. Check the housing-to-rotor axial clearance between the rotor and pump housing. If the housingto-rotor axial clearance exceeds the service limit, replace the outer rotor and oil pump housing.

Housing-to-Rotor Axial Clearance

• Standard (New): 0.02-0.07 mm (0.001-0.003 in.)
• Service Limit: 0.12 mm (0.005 in.)

9. Check the housing-to-outer rotor radial clearance between the outer rotor and pump housing. If the housing-to-outer rotor radial clearance exceeds the service limit, replace the outer rotor and oil pump housing.

Housing-to-Outer Rotor Radial Clearance

• Standard (New): 0.15-0.21 mm (0.006-0.008 in.)
• Service Limit: 0.23 mm (0.009 in.)

10. Inspect both rotors and the pump housing for scoring or other damage. Replace parts, if necessary.
11. Installation : Squeeze the new oil pump chain tensionerthen install the set clip on it as shown. The set clip is supplied with the oil pump chain tensioner.
12. Install the crankshaft sprocketoil pump chain, and oil pump.
13. Tighten the bolts on the oil pump.
14. Install the baffle plate.
15. Set the crankshaft sprocket so that the No. 1 piston is at top dead center (TDC). Align the keyon the sprocket and crankshaft with the pointer on the cylinder block.
16. Move the cam chain so that the colored piece aligns with the punched mark on the crankshaft sprocket.
17. Install the oil pump chain guideand oil pump chain tensioner.
18. Remove the set clip from the oil pump chain tensioner.
19. Install the cam chain




Honda S2000 AP1

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