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11A-1
ENGINE
CONTENTS 11109000276
ENGINE <4G6> ............................................ 11A
ENGINE <6A1> ............................................ 11B
ENGINE <4D6> ............................................ 11C
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11A-2 ENGINE <4G6> CONTENTS 11109000603 GENERAL INFORMATION .................. 3 Lash Adjuster Check ........................ 11 CRANKSHAFT PULLEY ................... 15 SERVICE SPECIFICATIONS ................. 3 CAMSHAFT AND CAMSHAFT OIL SEAL ... 16 SEALANTS ................................ 4 OIL PAN .................................. 19 SPECIAL TOOLS ........................... 4 CRANKSHAFT OIL SEAL .................. 20 ON-VEHICLE SERVICE ..................... 6 Drive Belt Tension Check and A
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11A-3 ENGINE <4G6> - General Information/Service Specifications GENERAL INFORMATION 11100010469 Items 4G63 Total displacement mL 1,997 Bore´ Stroke mm 85.0´88.0 Compression ratio 10.0 Combustion chamber Pentroof type Camshaft arrangement SOHC Intake 8 Number of valve Exhaust 8 Opening BTDC 11_ Intake Closing ABDC 53_ Valve timing Opening BBDC 63_ Exhaust Closing ATDC 21_ Fuel system Electronically controlled multipoint fuel injection Rocker arm Roller type Auto-lash adjuster Equipped SERVICE SPE
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11A-4 ENGINE <4G6> - Service Specifications/Sealants/Special Tools Items Standard value Limit Idle speed r/min 750± 100 - CO contents % 0.5 or less - HC contents ppm 100 or less - Compression pressure (250-400 r/min) kPa 1,400 Min. 1,060 Compression pressure difference of allcylinder kPa - Max. 100 Intake manifold vacuum kPa - Min. 69 Cylinder head bolt shank length mm - 99.4 Auto-tensioner push rod movement mm Within 1 - Timing belt tension torque Nm (Reference value) 3.5 - Auto-tensioner rod p
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11A-5 ENGINE <4G6> - Special Tools Tool Number Name Use MD998713 Camshaft oil seal Press-in of the camshaft oilseal installer MD998443 Auto-lash adjuster Supporting of auto-lash adjuster holder MD998727 Oil pan remover Removal of oil pan MD998781 Flywheel stopper Securing the flywheel MD998776 Crankshaft rear oil Press-in of the crankshaft rear oilseal seal installer MB990938 Handle Press-in of the crankshaft rear oilseal MD998767 Tension pulley Timing belt tension adjustment socket wrench GENER
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11A-6 ENGINE <4G6> - On-vehicle Service Alternator pulley Water pump ON-VEHICLE SERVICE 11100090432 pulley DRIVE BELT TENSION CHECK AND ADJUSTMENT ALTERNATOR DRIVE BELT TENSION CHECK Use a belt tension gauge to check that the belt tension is at the standard value at a point half-way between the two pulleys as shown in the illustration. In addition, press this section with a force of 98 N and check that the amount of Crankshaft pulley belt deflection is at the standard value. Standard value: Tens
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11A-7 ENGINE <4G6> - On-vehicle Service POWER STEERING OIL PUMP AND AIR CONDITIONER Oilpumppulley COMPRESSOR DRIVE BELT TENSION CHECK AND ADJUSTMENT 11100130127 98 N 1. Use a belt tension gauge to check that the belt tension B is at the standard value at a point half-way between the A two pulleys (indicated by an arrow in the illustration). Crankshaft pulley In addition, press this section with a force of 98 N and check that the amount of belt deflection is at the standard
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11A-8 ENGINE <4G6> - On-vehicle Service 7. Check that basic ignition timing is within the standard value. Standard value: 5_ BTDC±2_ 8. If the basic ignition timing is outside the standard value, inspect the MPI system while referring to GROUP 13A - Troubleshooting. 9. PresstheMUT-IIclearkey(Selectaforceddrivingcancel mode) to release the Actuator test. Caution If the test is not cancelled, a forced driving will continue for 27 minutes. Driving under this condition may damage the engine. 10. Che
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11A-9 ENGINE ENGINE <4G6> <4G6> - - On-vehicle On-vehicle Service Service 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 there is a deviation from the standard value, check the following items: D Diagnosis output D Closed-loop control (When the closed-loop control is normal, the output signal of the oxygen sensor changes between 0-400 mV and 600-1,000 mV at idle.) D Fuel pressure D Inject
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11A-10 ENGINE <4G6> - On-vehicle Service 6. Set compression gauge to one of the spark plug holes. 7. Crank the engine with the throttle valve fully open and measure the compression pressure. Standard value (at engine speed of 250-400 r/min): Compressiongauge 1,400 kPa Limit (at engine speed of 250-400 r/min): Min. 1,060 kPa 8. Measure the compression pressure for all the cylinders, and check that the pressure differences of the cylinders are below the limit. Limit: Max. 100 kPa 9. If there is a
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11A-11 ENGINE <4G6> - On-vehicle Service LASH ADJUSTER CHECK 11100290344 If an abnormal noise (knocking) that seems to be coming from the lash adjuster is heard after starting the engine and does not stop, carry out the following check. NOTE (1) The abnormal noise which is caused by a problem with the lash adjusters is generated after the engine isstarted,andwillvaryaccordingtotheenginespeed. However, thisnoiseisnotrelatedtothe actualengine load. Because of this, if the noise does not occur imme
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11A-12 ENGINE <4G6> - On-vehicle Service (3) Carry out lash adjuster simple check. (Refer to P.11A-13.) D If any of the rocker arms can be pushed down easily during the lash adjuster simple check, replace the corresponding lash adjusters. D Ifthelashadjustersimplecheckhasbeencarried out but all lash adjusters are normal (if none of the rocker arms could be pushed down easily), check for some other cause of the problem. NOTE You can check whether the lash adjusters are normal or not by carrying o
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11A-13 ENGINE <4G6> - On-vehicle Service 1. Stop the engine. 2. Remove the rocker cover. 3. Set the No.1 cylinder to the compression top dead centre position. 4. Check the rocker arms indicated by white arrows in the illustration by the procedures given below. Check whether the rocker arm moves downwards when the part of the rocker arm which touches the top of the lash adjuster is pushed. D Iftherockerarmmovesdowneasilywhenitispus
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11A-14 ENGINE ENGINE <4G6> <4G6> - - On-vehicle On-vehicle Service Service 1. Check the engine oil and replenish or replace the oil if necessary. NOTE (1) If there is a only small amount of oil, air will be drawn in through the oil screen and will get into the oil passage. (2) If the amount of oil is greater than normal, then the oil will being mixed by the crankshaft and a large Good amount of air may get mixed into the oil. (3) If the oil is degenerated, air and oil will not separate easily in
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11A-15 ENGINE <4G6> - Crankshaft Pulley CRANKSHAFT PULLEY 11200160303 REMOVAL AND INSTALLATION Pre-removal Operation Post-installation Operation D Under Cover Removal D Drive Belt Tension Adjustment (Refer to P.11A-6.) D Under Cover Installation 2 3 25 Nm 1 Removal steps 1. Drive belt (Power steering and 2. Drive belt (Alternator) A/C) 3. Crankshaft pulley
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11A-16 ENGINE <4G6> - Camshaft and Camshaft Oil Seal CAMSHAFT AND CAMSHAFT OIL SEAL 11200190418 REMOVAL AND INSTALLATION Pre-removal and Post-installation Operation D Air Cleaner Removal and Installation D Timing Belt Removal and Installation (Refer to P.11A-26.) D Relay Box Removal and Installation 10 Nm 5 1 2 (f 3± 1 mm) 4 14 Nm 3.4 Nm Sealant: MITSUBISHI GENUINE PART MD970389 or equivalent 3 22 Nm 8 5 28-34 Nm Lipsection 9 11 5 10 6 12 Cam section and journal section 88 Nm 12 8 7 Engine oil R
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11A-17 ENGINE <4G6> - Camshaft and Camshaft Oil Seal REMOVAL SERVICE POINTS AA" CAMSHAFT SPROCKET REMOVAL MB990767 MD998719 or MD998754 AB" ROCKER ARM AND SHAFT ASSEMBLY REMOVAL MD998443 Before removing the rocker arm and shaft assembly, install the special tools as shown in the illustration so that the lash adjusters will not fall out. INSTALLATION SERVICE POINTS "AA ROCKER ARM AND SHAFT ASSEMBLY INSTALLATION 1. Temporarily tighten the rocker shaft with the bolt so that all rocker arms on the i
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11A-18 ENGINE <4G6> - Camshaft and Camshaft Oil Seal "BA CAMSHAFT OIL SEAL INSTALLATION 1. Apply engine oil to the camshaft oil seal lip. 2. Use the special tool to press-fit the camshaft oil seal. MD998713 "CA CAMSHAFT SPROCKET INSTALLATION Usethespecialtooltostopthecamshaftsprocketfromturning inthesamewayaswasdoneduringremoval,andthentighten the bolts to the specified torque.
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11A-19 ENGINE <4G6> - Oil Pan OIL PAN 11200280207 REMOVAL AND INSTALLATION Pre-removal and Post-installation Operation D EngineOil Drainingand Supplying(Refer toGROUP D Front Exhaust Pipe Removal and Installation (Refer 12 - On-vehicle Service.) to GROUP 15.) D Oil Level Gauge Removal and Installation 5 f 4±1mm Bolt Groove hole 5 3 Sealant: MITSUBISHI GENUINE PART 4 MD970389 or equivalent 7Nm 2 9Nm 1 9Nm Removal steps 1. Drain plug 4. Oil level sensor "AA 2. Drain plug gasket AA" 5. Oil pan 3. B
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11A-20 ENGINE <4G6> - Crankshaft Oil Seal CRANKSHAFT OIL SEAL 11200310135 REMOVAL AND INSTALLATION 127-137 Nm 7 9 8 11 12 127-137 Nm 6 2 8 4 10 1 5 3 Crankshaft Crankshaft (Engineoil: boltwasher 12 5 (Engineoil: surface) bolt wash- er surface) Lip section 9 Lip section 10 Sealant: 3M Stud locking 4170 or equivalent Engine oil Crankshaft front oil seal removal Crankshaft rear oil seal removal steps steps D Timing belt (Refer to P.11A-26.) D Oil pan (Refer to P.11A-19.) D C
