Engine Overhaul (2.4L): Other Mitsubishi Eclipse IV рестайлинг

TIMING BELT

Replace the belt if any of the following conditions exist

Scheme 632

Scheme 633

Scheme 634

Scheme 635

1. Hardening of rubber backing. Back side should be glossy without resilience and leave no indent when pressed with fingernail.
2. Cracks on rubber back.
3. Cracks or peeling of canvas.
4. Cracks at bottom of ribs.
5. Cracks on belt sides.
6. Abnormal wear of belt sides. Normal wear is indicated if the sides are sharp as if cut by a knife. Abnormal wear is indicated if the sides are ragged.
7. Abnormal wear on teeth. Initial stage: Canvas worn (fluffy canvas fibers, rubbery texture gone, white discoloration, canvas texture indistinct) Final stage: Canvas worn, exposing rubber (tooth width reduced)
8. Missing tooth.

Scheme 636

Scheme 637

1. Check for oil leaks. If oil leaks are evident, replace the auto-tensioner.
2. Check the rod end for wear or damage and replace the auto-tensioner if necessary.
3. Measure the rod protrusion. If it is out of specification, replace the auto tensioner. Standard value: 12 mm (0.5 inch)
4. Press the rod with a force of 98 to 196 N (22 to 44 pound) and measure the movement of the rod. If the measured value is out of the standard value, replace the auto-tensioner. Standard value: 1.0 mm (0.03 inch) or less

CAMSHAFT

Measure the cam height. If it is below the limit, replace the camshaft.

Scheme 638

STANDARD VALUE AND MINIMUM LIMIT

Scheme 639

Scheme 640

Required Special Tools

1. MB991654: Cylinder Head Bolt Wrench (12)
2. MB991999: Valve Stem Seal Installer
3. MD998735: Valve Spring Compressor

VALVE GUIDE

Measure the clearance between the valve guide and valve stem. If it exceeds the limit, replace the valve guide or valve, or both.

Standard value

< Intake > 0.02-0.04 mm (0.0008-0.0016 inch)

< Exhaust > 0.04-0.06 mm (0.0016-0.0024 inch)

Limit

< Intake > 0.10 mm (0.003 inch)

< Exhaust > 0.15 mm (0.005 inch)

Scheme 641

VALVE SEAT

Assemble the valve, then measure the valve stem projection between the end of the valve stem and the spring seating surface. If the measurement exceeds the specified limit, replace the valve seat.

Standard value

< Intake > 48.33 mm (1.902 inches)

< Exhaust > 48.34 mm (1.903 inches)

Limit

< Intake > 48.83 mm (1.922 inches)

< Exhaust > 48.84 mm (1.923 inches)

Scheme 642

Scheme 643

1. Before correcting the valve seat, check for clearance between the valve guide and valve and, if necessary, replace the valve guide.
2. Using the seat grinder, correct to obtain the specified seat width and angle.
3. After correcting the valve seat, lap the valve and valve seat using lapping compound. Then, check the valve stem projection.

Scheme 644

Scheme 645

1. Cut the valve seat from the inside to thin the wall thickness. Then, remove the valve seat.
2. Rebore the valve seat hole in the cylinder head to a selected oversize valve seat diameter. Intake seat ring hole diameters 0.3 oversize: 35.30-35.33 mm (1.3898-1.3909 inches) 0.6 oversize: 35.60-35.63 mm (1.4016-1.4028 inches) Exhaust seat ring hole diameters 0.3 oversize: 33.30-33.33 mm (1.3110-1.3122 inches) 0.6 oversize: 33.60-33.63 mm (1.3228-1.3240 inches)
3. Before fitting the valve seat, either heat the cylinder head up to approximately 250°C (482°F) or cool the valve seat in liquid nitrogen, to prevent the cylinder head bore from galling.
4. Using a valve seat cutter, correct the valve seat to the specified width and angle. See " «VALVE SEAT RECONDITIONING PROCEDURE»(ref-308292-S38345026882009020200000) " on the previous page.

Scheme 646

1. Using a press, remove the valve guide toward the cylinder block. CAUTION: Do not install a valve guide of the same size again.
2. Rebore the valve guide hole of the cylinder head so that it fits the press-fitted oversize valve guide. Valve guide hole diameters 0.05 oversize 11.05-11.07 mm (0.4350-0.4358 inch) 0.25 oversize 11.25-11.27 mm (0.4429-0.4437 inch) 0.50 oversize 11.50-11.52 mm (0.4528-0.4535 inch)
3. Press-fit the valve guide until it protrudes 14.0 mm (0.55 inch) from the cylinder head top surface as shown in illustration. NOTE: When press-fitting the valve guide, work from the cylinder head top surface. NOTE: Pay attention to the difference in length of the valve guides. [Intake side: 45.5 mm (1.79 inches); exhaust side: 50.5 mm (1.99 inches)] NOTE: After installing the valve guides, insert new valves in them to check for smooth operation.

Scheme 647

Required Special Tools

1. MB991603: Bearing Installer Stopper
2. MD998162: Plug Wrench
3. MD998285: Crankshaft Front Oil Seal Guide
4. MD998371: Silent Shaft Bearing Puller
5. MD998372: Silent Shaft Bearing Puller
6. MD998375: Crankshaft Front Oil Seal Installer
7. MD998705: Silent Shaft Bearing Installer
8. MD998727: Oil Pan Cutter
9. MD998783: Plug Wrench Retainer

Scheme 648

1. Remove all oil pan bolts.
2. Drive in special tool MD998727 between the cylinder block and oil pan. NOTE: Never use a screwdriver or chisel to remove the oil pan. It will deform the oil pan flange and result in oil leakage.
3. Gently hit the special tool on its corner (shoulder), then slide it along the oil pan to remove it.

Scheme 649

1. Fit special tool MD998162 on the plug, and then hold it in position with special tool MD998783.
2. Loosen the plug.
3. Remove special tools MD998783 and MD998162 and then remove the plug.

Scheme 650

Scheme 651

1. Remove the plug on the side of the cylinder block.
2. Insert a Phillips screwdriver [shank diameter 8 mm (0.3 inch)] into the plug hole to lock the counterbalance shaft.
3. Loosen the flange bolt.

FRONT CASE

1. Check the oil passage for clogging. Clean if necessary.
2. Check the left counterbalance shaft front bearing for wear, damage and seizure. If the bearing is damaged, replace the front case.
3. Check the front case for cracks and other damage. Replace cracked or damaged front case.

OIL SEAL

1. Check the oil seal lip for wear and damage. Replace the oil seal if necessary.
2. Check the oil seal lip for deterioration. Replace the oil seal if necessary.

Scheme 652

1. Check the oil holes for clogging and clean if necessary.
2. Check the journal for seizure, damage and contact with bearing. If there is anything wrong with the journal, replace the counterbalance shaft, bearing or front case assembly if required.

Scheme 653

1. Assemble the oil pump gears to the front case and rotate it to ensure smooth rotation with no looseness.
2. Ensure that there is no ridge wear on the contact surface between the front case and the gear surface of the oil pump cover.
3. Check the side clearance. Standard value: Drive gear 0.08-0.14 mm (0.0031-0.0055 inch) Driven gear 0.06-0.12 mm (0.0024-0.0047 inch)

Scheme 654

Required Special Tool

1. MIT216941: Piston Pin Setting Tool

Scheme 655

1. Mark the cylinder number on the side of the connecting rod big end for correct reassembly.
2. Keep the removed connecting rods, caps, and bearings in that order according to the cylinder number.

<< A >> FLYWHEEL BOLT/DRIVE PLATE BOLT LOOSENING

1. Install special tool MD998781 to hold the flywheel or drive plate.
2. Remove the flywheel bolt or drive plate bolt.

Scheme 656

1. Install the two thrust bearings in the number 3 bearing bore in the cylinder block. For easier installation, apply engine oil to the bearings; this will help hold them in position.
2. The thrust bearings must be installed with their grooved side facing toward the crankshaft web.

SEALANTS AND ADHESIVES

SEALANTS & ADHESIVES SPECIFICATION CHART