Nissan S13 KA24DE Engine Adjustments: idle speed, idle mixtures, clearances and more

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VALVE CLEARANCE

All engines, except GA16DE and KA24DE, are equipped with hydraulic lifters. No adjustments are required.

1. Warm engine to normal operating temperature. Remove valve cover and spark plugs. Rotate crankshaft to bring piston No. 1 to TDC on compression stroke (lifters on cylinder No. 1 should be loose).
2. Measure valve clearance on intake valves for cylinders No. 1 and 2 and valve clearance on exhaust valves for cylinders No. 1 and 3.
3. Rotate crankshaft 360 degrees to bring piston No. 4 to TDC on compression stroke. Measure valve clearance on intake valves for cylinders No. 3 and 4 and valve clearance on exhaust valves for cylinders No. 2 and 4. Adjust valve clearances by replacing lifter shims.

VALVE CLEARANCE ADJUSTMENT

• Nissan 240sx 2.4L (KA24DE Engine) S13
  • Intake .012-.015 Hot-inches (.30-.38mm)
  • Exhaust .013-.016 Hot-inches (.33-.41mm)

KA24DE IGNITION TIMING

1. Start engine and warm to normal operating temperature. Turn ignition off. Disconnect throttle position sensor harness connector.
2. Start engine. Increase engine speed to 2000 RPM, 2 or 3 times, then allow engine to return to idle. Engine should be operating smoothly at correct idle RPM. Check ignition timing.
3. If ignition timing is incorrect, loosen hold-down bolt and turn distributor to adjust ignition timing. Turn ignition off and connect throttle position sensor harness connector. Recheck ignition timing.

• Nissan 240sx S13
  • Manual Transmission: 18-22 @ 700-800
  • Automatic Transmission (in neutral): 18-22 @ 700-800

IDLE SPEED AND MIXTURE

Mixture adjustment is NOT a normal tune-up procedure. DO NOT adjust unless mixture control unit is replaced or vehicle fails emissions tests. For ECM connector terminal identification.

KA24DE IDLE SPEED

1. Start engine and warm to normal operating temperature. Turn ignition off. Disconnect Throttle Position (TP) sensor harness connector. Start engine.
2. Increase engine speed to 2000 RPM, 2 or 3 times, then allow engine to return to idle. Ensure ignition timing is set correctly. Check idle speed.
3. If idle speed is incorrect, adjust idle speed by turning idle speed adjusting screw.
With idle speed correctly set, turn ignition off. Reconnect TP sensor and recheck idle speed.

KA24DE IDLE SPEED AND CO% LEVEL

• Nissan 240sx S13
  • Idle RPM with throttle position sensor connected: 650-750 (Automatic transmission/transaxle in Neutral)
  • Idle RPM With throttle position sensor disconnected: 600-700 (Automatic transmission/transaxle in Neutral)
  • CO Level (%) Measured in self-diagnostic mode: 7 (Maximum CO% level)

Click on the link to see the complete article with images check it out here: Nissan S13 KA24DE Engine Adjustments: idle speed, idle mixtures, clearances and more. Garage411.com