Engine Mechanical (3.8L): Other Mitsubishi Eclipse IV рестайлинг

WHEN USING THE TENSION GAUGE

Use a belt tension gauge to check that the belt tension is within the standard value.

Standard value: 490-686 N (110-154 pounds)

Scheme 266

BELT DEFLECTION CHECK

Apply approximately 98 N (22 pounds) of force to the middle of the drive belt between the pulleys (at the place indicated by the arrow) and check that the amount of deflection in within the standard value.

Standard value: 8.4-10.7 mm (0.33-0.42 inch)

Scheme 267

Scheme 268

1. Loosen the tensioner pulley fixing nut.
2. With the tensioner pulley fixing nut temporarily tightened to 15 +/- 5 N.m (11 +/- 4 ft-lb), set the belt tension or defection amount to the standard value using the adjusting bolt. Standard value: GENERATOR DRIVE BELT TENSION ADJUSTMENT SPECIFICATIONS ITEMS DURING ADJUSTMENT DURING REPLACEMENT Vibration frequency Hz 150-163 180-202 Tension N (lb) 539-637 (121-143) 785-981 (176-221) Deflection (Reference value) mm (in) 8.9-10.1 (0.35-0.40) 6.2-7.5 (0.24-0.30)
3. Tighten the tension pulley fixing nut. Tightening torque: 49 +/- 10 N.m (36 +/- 7 ft-lb)

WHEN USING A TENSION GAUGE

Use a belt tension gauge to check that the belt tension is within the standard value.

Standard value

STANDARD VALUE

Scheme 269

Apply approximately 98 N (22 lb) of force to the middle of the drive belt between the pulleys (at the place indicated by the arrow) and check that the amount of deflection is within the standard value.

Standard value

STANDARD VALUE

Scheme 270

if the tension or deflection is outside the standard value, adjust by the following procedure.

Scheme 271

1. Loosen the tensioner pulley lock nut.
2. Adjust the belt tension to the standard value by turning the adjusting bolt. The tension will increase when turning the adjusting bolt clockwise, and decrease when turning counterclockwise.
3. Tighten the lock nut to the specified torque. Tightening torque: 49 +/- 9 N.m (36 +/- 7 ft-lb)
4. Tighten the adjusting bolt. Tightening torque: 5.0 +/- 1.0 N.m (44 +/- 9 in-lb) CAUTION: Check after turning the crankshaft one or more rotations clockwise.
5. Check the belt deflection amount and tension, and readjust if necessary.

Scheme 272

1. Before checks, check that the engine oil, starter and battery are normal. Also, set the vehicle in the following condition: Engine coolant temperature: 80-95°C (176-203°F) Lights and all accessories: OFF Transaxle: Neutral (P range on vehicle with A/T) NOTE: On vehicles for Canada, the headlight, taillight, etc. remain lit even when the lighting switch is in "OFF" position but this is no problem for checks and adjustment.
2. Remove all of the ignition coils.
3. Remove the rocker cover.
4. Turn the crankshaft clockwise until the notch on the pulley is lined up with the "T" mark on the timing indicator.
5. Move the rocker arms on the No. 1 and No. 4 cylinders up and down by hand to determine which cylinder has its piston at the top dead center on the compression stroke. If both intake and exhaust valve rocker arms have a valve lash, the piston in the cylinder corresponding to these rocker arms is at the top dead center on the compression stroke.
6. Valve clearance inspection and adjustment can be performed on rocker arms indicated by white arrow mark when the No.1 cylinder piston is at the top dead center on the compression stroke, and on rocker arms indicated by black arrow mark when the No.4 cylinder piston is at the top dead center on the compression stroke.
7. Measure the valve clearance for intake side. If the valve clearance is not as specified, loosen the rocker arm lock nut and adjust the clearance using a thickness gauge while turning the adjusting screw. Standard value (hot engine): 0.20 mm (0.008 inch) NOTE: Valve clearance check and adjustment is unnecessary for exhaust side due to auto lash adjuster installed.
8. While holding the adjusting screw with a screwdriver to prevent it from turning, tighten the lock nut to the specified torque. Tightening torque: 9 +/- 1 N.m (80 +/- 9 in-lb)
9. Turn the crankshaft 360 degrees to line up the notch on the crankshaft pulley with the "T" mark on the timing indicator.
10. Repeat steps ( 7 ) and ( 8 ) on other valves for clearance adjustment.
11. Install the rocker cover.
12. Install the ignition coils.

Scheme 273

Scheme 274

Scheme 275

Scheme 276

1. Remove all of the ignition coils.
2. Remove the rocker cover.
3. Remove the engine oil control valve.
4. Remove the engine oil pressure switch.
5. Turn the crankshaft clockwise until the notch on the crankshaft pulley is lined up with the "T" mark on the lower cover of timing belt.
6. Move the rocker arms on the No.1 and No.4 cylinders up and down by hand to determine which cylinder has its piston at the top dead center on the compression stroke. NOTE: The rocker arm piston operation check can be performed on rocker arms indicated by white arrow mark when the No.1 cylinder piston is at the top dead center on the compression stroke, and on rocker arms indicated by black arrow mark when the No.4 cylinder piston is at the top dead center on the compression stroke.
7. While shutting up the oil passage hole at the depth of the engine oil control valve's installation hole by finger not to leak air, blow compressed air into the engine oil pressure switch's installation hole by air blow gun. At this time, confirm that the rocker arm piston can operate. NOTE: To fully confirm the check, prevent the compression air from leaking as much as possible by installing the O-ring to the end of air blow gun.
8. Turn the crankshaft clockwise until the notch on the crankshaft pulley is lined up with the "T" mark on the lower cover of timing belt.
9. Confirm the rest of the rocker arm pistons under the procedure 7.
10. When the rocker arm piston does not operate, replace the rocker arm assembly.
11. Install the engine oil pressure switch and the engine oil control valve. (Refer to «CAMSHAFT AND VALVE STEM SEAL - REMOVAL AND INSTALLATION»(ref-308266-S39273492232009020200000) ).
12. Install the rocker cover.
13. Install all of the ignition coils.

IGNITION TIMING CHECK

Required Special Tool

MB991958: Scan Tool (MUT-III Sub Assembly)

1. MB991824: V.C.I.
2. MB991827: MUT-III USB Cable
3. MB991910: MUT-III Main Harness A

Scheme 277

1. Before inspection, set the vehicle in the following condition: Engine coolant temperature: 80-95°C (176-203°F) Lights and all accessories: OFF Transaxle: Neutral (P range on vehicle with A/T) NOTE: On vehicles for Canada, the headlight, taillight, etc. remain lit even when the lighting switch is in "OFF" position but this is no problem for checks. CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
2. Connect scan tool MB991958 to the data link connector.
3. Set the timing light to the power supply line (terminal No. 1) of the ignition coil No. 1. NOTE: The power supply line is looped and also longer than the other ones.
4. Start the engine and run it at idle.
5. Check that the idle speed is approximately 680 r/min.
6. Select scan tool MB991958 actuator test "item number 4".
7. Check that basic ignition timing is within the standard value. Standard value: 5° BTDC +/- 3°
8. If the basic ignition timing is not within the standard value, check the following items: Diagnostic output Timing belt cover and crankshaft position sensor installation conditions Crankshaft sensing blade condition CAUTION: If the actuator test is not canceled, the forced drive will continue for 27 minutes. Driving in this state could lead to engine failure.
9. Press the clear key on scan tool MB991958 (select forced drive stop mode), and cancel the actuator test.
10. Check that the actual ignition timing is at the standard value. Standard value: Approximately 10° BTDC NOTE: Ignition timing fluctuates about +/- 7° Before Top Dead Center, even under normal operating condition. NOTE: It is automatically further advanced by about 5° to 10° Before Top Dead Center at higher altitudes.

IDLE SPEED CHECK

Required Special Tool

MB991958: Scan Tool (MUT-III Sub Assembly)

1. MB991824: V.C.I.
2. MB991827: MUT-III USB Cable
3. MB991910: MUT-III Main Harness A

Scheme 278

1. Before inspection, set the vehicle in the following condition: Engine coolant temperature: 80-95°C (176-203°F) Lights and all accessories: OFF Transmission: Neutral (P range on vehicle with A/T) NOTE: On vehicles for Canada, the headlight, taillight, etc. remain lit even when the lighting switch is in "OFF" position but this is no problem for checks. CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
2. Connect scan tool MB991958 to the data link connector.
3. Check the basic ignition timing. Standard value: 5° BTDC +/- 3°
4. Start the engine.
5. Run the engine at idle for 2 minutes.
6. Check the idle speed. Select item number 2 and take a reading of the idle speed. Curb idle speed: 680 +/- 100 r/min NOTE: The idle speed is controlled automatically by the idle air control system.
7. If the idle speed is outside the standard value, refer to «SYMPTOM CHART»(ref-308262-S37673138052009020200000) .

IDLE MIXTURE CHECK

Required Special Tool

MB991958: Scan Tool (MUT-III Sub Assembly)

1. MB991824: V.C.I.
2. MB991827: MUT-III USB Cable
3. MB991910: MUT-III Main Harness A

Scheme 279

1. Before inspection, set the vehicle in the following condition: Engine coolant temperature: 80-95°C (176-203°F) Lights and all accessories: OFF Transmission: Neutral (P range on vehicle with A/T) NOTE: On vehicles for Canada, the headlight, taillight, etc. remain lit even when the lighting switch is in "OFF" position but this is no problem for checks. CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
2. Connect scan tool MB991958 to the data link connector.
3. Check that the basic ignition timing is within the standard value. Standard value: 5° BTDC +/- 3°
4. Start the engine and increase the engine speed to 2,500 r/min for 2 minutes.
5. Set the CO, HC tester.
6. Check the CO contents and the HC contents at idle. Standard value: CO contents: 0.5% or less HC contents: 100 ppm or less
7. If the CO and HC contents do not remain inside the standard value, check the following items: NOTE: Replace the catalytic converter when the CO and HC contents do not remain inside the standard value, even though the result of the inspection is normal for all items. Diagnostic output Closed-loop control (When the closed-loop control is carried out normally, the output signal of the heated oxygen sensor changes between 0-400 mV and 600-1,000 mV at idle.) Fuel pressures Injector Ignition coil, spark plug EGR system and EGR valve leak Evaporative emission system Compression pressure

COMPRESSION PRESSURE CHECK

Required Special Tool

MB991958: Scan Tool (MUT-III Sub Assembly)

1. MB991824: V.C.I.
2. MB991827: MUT-III USB Cable
3. MB991910: MUT-III Main Harness A

Scheme 280

Scheme 281

Scheme 282

1. Before inspection, check that the engine oil, starter and battery are normal. Also, set the vehicle in the following condition: Engine coolant temperature: 80-95°C (176-203°F) Lights and all accessories: OFF Transmission: Neutral (P range on vehicle with A/T) NOTE: On vehicles for Canada, the headlight, taillight, etc. remain lit even when the lighting switch is in "OFF" position but this is no problem for checks.
2. Remove all of the ignition coils and spark plugs.
3. Disconnect the crankshaft position sensor connector. NOTE: Doing this will prevent the engine control module from carrying out ignition and fuel injection. WARNING: Keep your distance from the spark plug hole when cranking. Oil, fuel, etc., may spray out from the spark plug hole and may cause serious injury.
4. Cover the spark plug hole with a shop towel etc., during cranking. After the engine has been cranked, check for foreign material adhering to the shop towel.
5. Set compression gauge to one of the spark plug holes.
6. Crank the engine and measure the compression pressure. Standard value (at engine speed of 200 r/min): 1,550 kPa (225 psi) Minimum limit (at engine speed of 200 r/min): 1,110 kPa (161 psi)
7. Measure the compression pressure for all the cylinders, and check that the pressure differences of the cylinders are below the limit. Limit: 98 kPa (14 psi)
8. If there is a cylinder with compression or a compression difference that is outside the limit, pour a small amount of engine oil through the spark plug hole, and repeat the operations in steps 6 to 8. If the compression increases after oil is added, the cause of the malfunction is a worn or damaged piston ring and/or cylinder inner surface. If the compression does not rise after oil is added, the cause is a burnt or defective valve seat, or pressure is leaking from the gasket.
9. Connect the crankshaft position sensor connector.
10. Install the spark plugs and ignition coils.
11. Use the scan tool MB991958 to erase the diagnostic trouble codes. NOTE: This will erase the diagnostic trouble code resulting from the crankshaft position sensor connector being disconnected.

Scheme 283

1. Start the engine and allow it to warm up until the temperature of the engine coolant reaches 80-95°C (176-203°F).
2. Connect an engine tachometer.
3. Disconnect the ventilation hose from the positive crankcase ventilation (PCV) valve, and connect a vacuum gauge to the ventilation hose.
4. Plug the PCV valve.
5. Start the engine and check that idle speed is within specification. Then check the vacuum gauge reading. Idle speed: 680 +/- 100 r/min Minimum limit: 60 kPa (18 in Hg)

LASH ADJUSTER CHECK

If an abnormal noise (chattering noise) suspected to be caused by malfunction of the lash adjuster is produced immediately after starting the engine and does not disappear, perform the following check.

Note. The lash adjuster is installed in exhaust side only.

Note. An abnormal noise due to malfunction of the lash adjuster is produced immediately after starting the engine and changes with the engine speed, irrespective of the engine load. If, the abnormal noise is not produced immediately after starting the engine or does not change with the engine speed, or it changes with the engine load, the lash adjuster is not the cause for the abnormal noise.

Note. When the lash adjuster is malfunctioning, the abnormal noise is rarely eliminated by continuing the warming-up of the engine at idle speed. However, the abnormal noise may disappear only when seizure is caused by oil sludge in the engine whose oil is not maintained properly.

1. Start the engine.
2. Check if the abnormal noise produced immediately after starting the engine, changes with the change in the engine speed. If the abnormal noise is not produced immediately after starting the engine or it does not change with the engine speed, the lash adjuster is not the cause for the noise. Therefore, investigate other causes. The abnormal noise is probably caused by some other parts than the engine proper if it does not change with the engine speed. (In this case, the lash adjuster is in good condition.)
3. With the engine idling, change the engine load (shift from N to D range, for example) to make sure that there is no change in the level of abnormal noise. If there is a change in the level of abnormal noise, suspect a tapping noise due to worn crankshaft bearing or connecting rod bearing (In this case, the lash adjuster is in good condition).
4. After completion of warm-up, run the engine at idle to check for abnormal noise. If the noise is reduced or disappears, clean the lash adjuster (Refer to «INSPECTION»(ref-308283-S18615457762009020200000) ). As it is suspected that the noise is due to seizure of the lash adjuster. If there is no change in the level of the abnormal noise, proceed to next step.
5. Run the engine to bleed lash adjusters (Refer to «BLEED THE LASH ADJUSTER SYSTEM»(ref-308266-S31668089672009020200000) ).
6. If the abnormal noise does not disappear after air bleeding operation, clean the lash adjuster (Refer to «INSPECTION»(ref-308283-S18615457762009020200000) ).

BLEEDING LASH ADJUSTER SYSTEM

Note. Parking the vehicle on a grade for a long time may decrease oil in the lash adjuster, causing air to enter the high pressure chamber when starting the engine.

Note. After parking for many hours, oil may run out from the oil passage and take time before oil is supplied to the lash adjuster, causing air to enter the high pressure chamber.

Note. In the above cases, abnormal noise can be eliminated by bleeding the lash adjuster system.

Scheme 284

Scheme 285

Scheme 286

1. Check engine oil and add or change oil if required. NOTE: If the engine oil level is low, air is sucked from the oil screen, causing air to enter the oil passage. NOTE: If the engine oil level is higher than specification, oil may be stirred by the crankshaft, causing oil to be mixed with a large quantity of air. NOTE: If oil is deteriorated, air is not easily separated from oil, increasing the quantity of air contained in oil. NOTE: If air mixed with oil enters the high pressure chamber inside the lash adjuster from the above causes, air in the high pressure chamber is compressed excessively while the valve is opened, resulting in an abnormal noise when the valve closes. This is the same phenomenon as that observed when the valve clearance has become excessive. The lash adjuster can resume normal function when air entered the lash adjuster is removed.
2. Idle the engine for one to three minutes to warm it up.
3. Repeat the operation pattern, shown in illustration, at no load to check for abnormal noise. (Usually the abnormal noise is eliminated after repetition of the operation 10 to 30 times. If, however, no change is observed in the level of abnormal noise after repeating the operation more than 30 times, suspect that the abnormal noise is due to some other factors.)
4. After elimination of abnormal noise, repeat the operation shown in illustration five more times.
5. Run the engine at idle for one to three minutes to make sure that the abnormal noise has been eliminated.

<< C >> FUEL HIGH-PRESSURE HOSE CONNECTION

Apply a small amount of engine oil to the fuel line pipe and then install the fuel high-pressure hose.

Scheme 287

Scheme 288

Scheme 289

Required Special Tools

1. MB990767: Front Hub and Flange End Yoke Holder
2. MD998713: Camshaft Oil Seal Installer
3. MD998715: Crankshaft Pulley Holder Pin

SEALANTS

SEALANTS SPECIFICATIONS