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1998 Toyota Avalon XLS 1997-98 ENGINES 3.0L V6

1997-98 ENGINES 3.0L V6

ENGINE IDENTIFICATION NOTE:

For engine repair procedures not covered in this article, see ENGINE OVERHAUL PROCEDURES - GENERAL INFORMATION article in the GENERAL INFORMATION.

NOTE:

When servicing engine, reference to right and left refers to engine sides as viewed from rear of engine (drive plate end).

Engine serial number is stamped on rear of cylinder block. See Fig. 1 . ENGINE IDENTIFICATION CODE Engine 3.0L V6

Code 1MZ-FE

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1998 Toyota Avalon XLS 1997-98 ENGINES 3.0L V6

Fig. 1: Locating Engine Serial Number Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

ADJUSTMENTS VALVE CLEARANCE ADJUSTMENT NOTE:

Adjust valve clearance with engine cold. WARNING: To prevent air bag deployment, disconnect negative battery cable at least 90 seconds before working on vehicle.

1. Disconnect negative battery cable. Drain cooling system. On Sienna, remove outer cowl top panel assembly, including wiper arms and ventilator louver. See Fig. 2 . Remove right fender apron seal.

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1998 Toyota Avalon XLS 1997-98 ENGINES 3.0L V6

Fig. 2: Removing Outer Cowl Top Panel Assembly (Sienna) Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 2. On all models, disconnect control cables from throttle body (if necessary). Disconnect upper radiator hose at coolant outlet housing. Remove air cleaner cap and airflow meter with air intake hose. Remove nuts and intake manifold cover located above intake manifold. 3. Disconnect necessary electrical connections and vacuum hoses from vacuum switching valve assembly located above intake manifold. Remove nuts and vacuum switching valve assembly. NOTE:

Vacuum switching valve assembly may be referred to as emission control valve set.

4. Disconnect necessary electrical connections, coolant hoses and vacuum hoses for removal of air intake chamber located above valve cover. Remove No. 1 engine hanger, air intake chamber support, and EGR pipe as necessary. 5. Remove bolts/nuts, air intake chamber and gasket. Disconnect electrical connectors for removal of wiring assemblies located above valve covers. Remove bolts and wiring assemblies. Helpmelearn November-03-08 10:08:23 AM

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1998 Toyota Avalon XLS 1997-98 ENGINES 3.0L V6

6. Remove bolts and ignition coil assemblies. Mark ignition coil installation location for reassembly reference. Remove spark plugs. Remove bolts, valve covers and gaskets. Rotate crankshaft clockwise (viewed from front of engine) so cylinder No. 1 is at TDC on compression stroke. Cylinder No. 1 is front cylinder on right side when viewed from rear of engine. See Fig. 3 . 7. Ensure timing mark on crankshaft pulley aligns with "0" mark on timing belt cover. Ensure intake and exhaust valve lifters on cylinder No. 1 are loose. If conditions are not as described, rotate crankshaft clockwise one complete revolution. 8. Using feeler gauge, measure and record valve clearance between valve lifter and camshaft on intake valves of cylinders No. 1 and 6 and exhaust valves on cylinders No. 2 and 3. Perform STEP 1. See Fig. 3.

Fig. 3: Identifying Valve & Cylinder Arrangement Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 9. Rotate crankshaft clockwise an additional 2/3 turn (240 degrees). Measure and record valve clearance between valve lifter and camshaft on intake valves of cylinders No. 2 and 3 and exhaust valves on cylinders No. 4 and 5. Perform STEP 2. See Fig. 3 . 10. Rotate crankshaft clockwise an additional 2/3 turn (240 degrees). Measure and record valve clearance between valve lifter and camshaft on intake valves of cylinders No. 4 and 5 and exhaust valves on cylinders No. 1 and 6. Perform STEP 3. See Fig. 3 . Ensure valve clearance is within specification. See VALVE CLEARANCE SPECIFICATIONS . VALVE CLEARANCE SPECIFICATIONS (1) Application Exhaust Valve Intake Valve (1) Adjust valve clearance with engine cold.

In. (mm) .010-.014 (.25-.35) .006-.010 (.15-.25)

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1998 Toyota Avalon XLS 1997-98 ENGINES 3.0L V6

11. If valve clearance requires adjustment, rotate camshaft so lobe on valve to be adjusted is facing upward, away from valve lifter. Position notch on valve lifter perpendicular to the camshaft. Ensure notch is not aligned with the camshaft. 12. Valve Clearance Adjuster (SST 09248-55040) is used to remove adjusting shim. Using SST "A" of valve clearance adjuster, push downward on valve lifter. See Fig. 4 . Place SST "B" between camshaft and valve lifter with the side marked with a "7" or "9" in the right location, depending on cylinder application. Side marked with "7" should be used on front valves on No. 1 and 2 cylinders only. Remove SST "A". 13. Using small screwdriver and magnet, remove adjusting shim. Measure and record thickness of removed adjusting shim. Using measured clearance and adjusting shim thickness, select proper replacement adjusting shim. See Fig. 5 and Fig. 6 . 14. Install replacement adjusting shim with imprinted number on adjusting shim facing the valve lifter. Recheck valve clearance. Before installing valve cover and gasket, apply sealant at front and rear areas of cylinder head. See Fig. 7 . 15. Using NEW gasket, install valve cover. Install and tighten valve cover bolts to specification in several steps. See TORQUE SPECIFICATIONS . To install remaining components, reverse removal procedure. Use NEW gaskets. Tighten all fasteners to specification. Fill cooling system and adjust control cables (if necessary).

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1998 Toyota Avalon XLS 1997-98 ENGINES 3.0L V6

Fig. 4: Adjusting Valve Clearance Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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1998 Toyota Avalon XLS 1997-98 ENGINES 3.0L V6

Fig. 5: Exhaust Valve Adjusting Shim Selection Chart Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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1998 Toyota Avalon XLS 1997-98 ENGINES 3.0L V6

Fig. 6: Intake Valve Adjusting Shim Selection Chart Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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1998 Toyota Avalon XLS 1997-98 ENGINES 3.0L V6

Fig. 7: Identifying Cylinder Head Sealant Application Areas Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

REMOVAL & INSTALLATION CAUTION: When battery is disconnected, vehicle computer and memory systems may lose memory data. Driveability problems may exist until computer systems have completed a relearn cycle. NOTE:

For reassembly reference, label all electrical connectors, vacuum hoses and fuel lines before removal. Also place mating marks on engine hood and other major assemblies before removal.

FUEL PRESSURE RELEASE With ignition off, disconnect negative battery cable. Place an approved gasoline container under fuel line. Cover fuel line connection with shop towel. Slowly loosen fuel line connection to release fuel pressure. Once fuel pressure is released, fuel system components may be serviced. ENGINE WARNING: To prevent air bag deployment, disconnect negative battery cable at least 90 seconds before working on vehicle. NOTE:

Remove engine and transaxle as an assembly.

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1998 Toyota Avalon XLS 1997-98 ENGINES 3.0L V6

Removal (Avalon & Camry)

1. Release fuel pressure. See FUEL PRESSURE RELEASE . Drain cooling system and engine oil. Remove hood, battery and battery tray. Disconnect control cables from throttle body (if necessary). Remove air cleaner cap and airflow meter with air cleaner hose. Remove air filter and air cleaner case. 2. Remove cruise control actuator and bracket. Remove radiator and coolant reservoir tank. Remove relay box from left front corner of engine compartment and disconnect electrical connectors. Disconnect electrical connections at ignitor and noise filter near left strut tower. 3. Disconnect necessary coolant hoses, electrical connections, fuel lines and vacuum hoses. To disassemble quick disconnect fuel fittings, remove fuel line-to-intake manifold clamp bolt at rear of intake manifold. Remove fuel pipe clamp from No. 1 fuel pipe at fuel filter. Perform STEP 1. See Fig. 8 . Ensure area around No. 1 fuel pipe and fuel filter is clean. Depress both sides of retainer and pull No. 1 fuel pipe with disconnect fitting from fuel filter. Perform STEP 2. See Fig. 8 . CAUTION: Use care when disconnecting No. 1 fuel pipe from fuel filter, as some residual fuel pressure may still exist in the fuel system.

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1998 Toyota Avalon XLS 1997-98 ENGINES 3.0L V6

Fig. 8: Disconnecting No. 1 Fuel Pipe From Fuel Filter (Avalon & Camry) Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 4. Remove lower panel on passenger's side of instrument panel. Remove glove box. Disconnect necessary electrical connections so engine wiring can be pulled out through firewall. Remove nuts and pull engine wiring through firewall. 5. Remove A/C compressor and power steering pump with hoses attached and secure aside. Raise and support vehicle. Remove lower engine cover. Remove front exhaust pipe that fits between exhaust Helpmelearn November-03-08 10:08:23 AM

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1998 Toyota Avalon XLS 1997-98 ENGINES 3.0L V6

6.

7. 8. 9. 10.

11. 12.

manifolds and catalytic converter. Disconnect electrical connections, control cables and oil cooler lines from transaxle. Using Wrench (SST 09631-22020), disconnect pressure hose from hydraulic cooling fan pump. Remove fender apron from inside fenderwell for axle shaft removal. Remove front wheels. Remove cotter pin and retainer from end of axle shaft. Apply brakes and remove axle shaft nut. Drain transaxle fluid. Remove nut and separate tie rod from steering knuckle. Remove nut and separate stabilizer bar link from lower control arm. Remove ball joint-to-lower control arm bolts/nuts. Separate lower control arm from ball joint. Cover axle shaft boot with shop towel. Using soft-faced hammer, tap axle shaft from hub assembly. Push hub assembly outward and separate axle shaft from hub assembly. To remove left (driver's side) axle shaft, pry axle shaft from transaxle and remove. See Fig. 9 . To remove right (passenger's side) axle shaft, remove axle shaft bearing retainer bolt. Remove snap ring and axle shaft. See Fig. 9 . Support engine with hoist. Remove engine mount-to-transaxle bolts. Remove engine mount bolts/nuts. Remove bolts and engine mount absorber, located on front of engine, near exhaust manifold. Remove engine stabilizer rod, engine mounting bracket and right engine mount brace, located near timing belt cover. Lift engine and transaxle from vehicle.

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1998 Toyota Avalon XLS 1997-98 ENGINES 3.0L V6

Fig. 9: Removing Axle Shafts Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. Installation

1. To install, reverse removal procedure. Tighten all fasteners to specification. See TORQUE SPECIFICATIONS . 2. When installing axle shafts, install NEW snap ring on end of axle shaft. Coat axle shaft splines and sliding surfaces with gear oil. Install axle shafts in transaxle with opening of snap ring facing downward. 3. Ensure left (driver's side) axle shaft will move inward and outward about .079-.118" (2.00-3.00 mm) after being installed. Ensure axle shaft cannot be pulled from transaxle. 4. When installing right (passenger's side) axle shaft, install NEW snap ring and NEW axle shaft bearing retainer bolt. Tighten axle shaft bearing retainer bolt to specification. See TORQUE SPECIFICATIONS . 5. To install remaining components, reverse removal procedure. Adjust fluid levels and control cables (if Helpmelearn November-03-08 10:08:23 AM

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1998 Toyota Avalon XLS 1997-98 ENGINES 3.0L V6

necessary). Removal (Sienna)

1. Release fuel pressure. See FUEL PRESSURE RELEASE . Drain cooling system and engine oil. Remove hood, battery and battery tray. Remove cowl top panel assembly. See Fig. 2 . Remove heater air duct. Remove air cleaner cap and airflow meter with air cleaner hose. Remove air filter and air cleaner case. 2. Remove cruise control actuator and bracket. Remove radiator and coolant reservoir tank. Disconnect A/T oil cooler pipe. Disconnect necessary A/C lines, coolant hoses, electrical connections, fuel lines and vacuum hoses. Disconnect shift control cable from transaxle. Remove front exhaust pipe. 3. Remove fender apron seals. Raise and support vehicle. Remove axle shafts. Disconnect stabilizer bar links and intermediate shaft assembly. Disconnect power steering hose from power steering reservoir and reservoir pipe. Remove cover under engine. Attach Engine Hangers (SST 12282-20020). Attach sling device to hangers. 4. Remove right engine mount. Remove engine mount control rod and No. 2 right engine mount bracket. Remove 4 lower braces from underneath vehicle. Lower engine, transaxle, and front suspension assembly from vehicle. Installation

To install, reverse removal procedure. Tighten all fasteners to specification. See TORQUE SPECIFICATIONS . CYLINDER HEAD & MANIFOLDS WARNING: To prevent air bag deployment, disconnect negative battery cable at least 90 seconds before working on vehicle. Removal (Avalon & Camry)

1. Release fuel pressure. See FUEL PRESSURE RELEASE . Disconnect negative battery cable. Drain cooling system. 2. Disconnect control cables from throttle body (if necessary). Remove battery and battery tray (if necessary). Drain cooling system. 3. Remove air cleaner cap and airflow meter with air cleaner hose. Remove cruise control actuator and bracket. Disconnect necessary electrical connections, ground straps, coolant hoses, fuel lines and vacuum hoses for removal of air intake chamber and cylinder head. 4. Remove right engine mount brace, located near timing belt cover. Remove nuts and "V" bank cover, located above intake manifold. See Fig. 10 . Disconnect necessary electrical connectors and vacuum hoses from vacuum switching valve assembly located above intake manifold. Remove vacuum switching valve assembly. 5. Disconnect brackets and hoses from air intake chamber. Remove No. 1 engine hanger and air intake chamber support. See Fig. 10 . Remove EGR pipe and gaskets (if necessary). Helpmelearn November-03-08 10:08:24 AM

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1998 Toyota Avalon XLS 1997-98 ENGINES 3.0L V6

6. Remove bolts/nuts, air intake chamber and gasket. Disconnect electrical connectors for removal of engine wiring located above valve covers. Remove nuts and engine wiring. 7. Remove ignition coils and spark plugs. Mark ignition coil installation location for reassembly reference. Raise and support vehicle. Remove front exhaust pipe that fits between exhaust manifolds and catalytic converter. 8. Remove timing belt, camshaft sprockets and No. 2 idler pulley. See TIMING BELT . Remove No. 3 timing belt cover from front of cylinder heads. See Fig. 17 . 9. Remove cylinder head rear plate, coolant inlet pipe and air assist hose. See Fig. 10 . Remove intake manifold bolts/nuts, washers and intake manifold along with delivery pipes and injectors. 10. If removing delivery pipe and injectors from intake manifold, remove No. 2 fuel pipe from delivery pipe. See Fig. 10 . Remove pressure regulator and pulsation damper (if necessary). CAUTION: DO NOT allow injectors to fall from delivery pipe when removing from intake manifold. 11. To disassemble quick disconnect fuel fittings, remove fuel line-to-intake manifold clamp bolt at rear of intake manifold. Remove fuel pipe clamp from No. 1 fuel pipe at fuel filter. Perform STEP 1. See Fig. 8 . Ensure area around No. 1 fuel pipe and fuel filter is clean. Depress both sides of retainer and pull No. 1 fuel pipe with disconnect fitting from fuel filter. Perform STEP 2. See Fig. 8 . CAUTION: Use care when disconnecting No. 1 fuel pipe from fuel filter, as some residual fuel pressure may still exist in the fuel system.

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1998 Toyota Avalon XLS 1997-98 ENGINES 3.0L V6

Fig. 10: Exploded View Of Intake Manifold & Components (Avalon & Camry Shown; Sienna Is Similar) Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. Helpmelearn November-03-08 10:08:24 AM

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1999 TOYOTA AVALON Service Repair Manual  

1999 TOYOTA AVALON Service Repair Manual  

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