Engine Controls - Adjustments - v6 Toyota Camry V30

ENGINE MECHANICAL

Before performing any on-vehicle adjustments to fuel or ignition systems, ensure engine mechanical condition is okay.

Scheme 30

Camry

1. Check and adjust valve clearance with engine cold. Remove valve covers. Rotate crankshaft pulley and align crankshaft pulley groove with "0" mark on timing belt cover so cylinder No. 1 is at TDC on compression stroke.
2. Ensure cylinder No. 1 intake valve lifters are loose and exhaust valve lifters are tight. If valve lifters are not as described, rotate crankshaft 360 degrees and realign timing marks.
3. Use feeler gauge to measure valve clearance between valve lifter and camshaft lobe. Measure and record valve clearance of intake valves on cylinders No. 1 and 6, and exhaust valves on cylinders No. 2 and 3. (Scheme 31)
4. Rotate crankshaft pulley an additional 240 degrees (2/3 revolution). Measure and record valve clearance of intake valves on cylinders No. 2 and 3, and exhaust valves on cylinders No. 4 and 5.
5. Rotate crankshaft pulley an additional 240 degrees (2/3 revolution). Measure and record valve clearance of intake valves on cylinders No. 4 and 5, and exhaust valves on cylinders No. 1 and 6.
6. Valve clearance should be within specification. See the «VALVE CLEARANCE SPECIFICATIONS (V6)»(/toyota/camry/v30-1990-1994/remont/adjustments/#engine-controls-adjustments-v6) table. If valve clearance adjustment is required, rotate crankshaft pulley so camshaft lobe is facing upward on valve to be adjusted.
7. Position adjusting shim notch toward spark plug. Use ValveClearance Adjuster (SST 09248-55020) and SST (A) to press valve lifter downward. (Scheme 30)
8. Install SST (B) between camshaft and valve lifter. Remove SST (A). Using a small screwdriver and magnet, remove adjusting shim. Using micrometer, measure thickness of removed adjusting shim.
9. Using measured clearance and adjusting shim thickness, determine correct thickness of adjusting shim to be used. Determine correct thickness of adjusting shim to be used by subtracting appropriate valve clearance specification (See «VALVE CLEARANCE SPECIFICATION»(/toyota/camry/v30-1990-1994/remont/adjustments/#engine-controls-adjustments-v6) Table) from measured valve clearance. Add this number to thickness of old shim. Select a new shim with a thickness as close as possible to the calculated value.
10. Install proper adjusting shim. Using SST (A), press downward on valve lifter and remove SST (B). Recheck valve clearance. Install valve covers.

Scheme 31

VALVE CLEARANCE SPECIFICATIONS (V6)

Scheme 32

1. Check and adjust valves with engine cold. Remove valve covers. Rotate crankshaft pulley and align crankshaft pulley groove with "0" mark on timing belt cover so cylinder No. 1 is at TDC on compression stroke.
2. Ensure cylinder No. 1 valve lifters are loose and cylinder No. 4 valve lifters are tight. If valve lifters are not as described, rotate crankshaft 360 degrees and realign timing marks. Use feeler gauge to measure valve clearance between valve lifter and camshaft lobe.
3. Measure and record clearance of exhaust valve on cylinder No. 2, and intake valve on cylinder No. 6. (Scheme 32) Rotate crankshaft pulley an additional 120 degrees (1/3 revolution). Measure and record clearance of intake valve on cylinder No. 1, and exhaust valve on cylinder No. 3.
4. Rotate crankshaft pulley an additional 120 degrees (1/3 revolution). Measure and record clearance of intake valve on cylinder No. 2, and exhaust valve on cylinder No. 4.
5. Rotate crankshaft pulley an additional 120 degrees (1/3 revolution). Measure and record clearance of intake valve on cylinder No. 3, and exhaust valve on cylinder No. 5.
6. Rotate crankshaft pulley an additional 120 degrees (1/3 revolution). Measure and record clearance of intake valve on cylinder No. 4, and exhaust valve on cylinder No. 6.
7. Rotate crankshaft pulley an additional 120 degrees (1/3 revolution). Measure and record clearance of intake valve on cylinder No. 5, and exhaust valve on cylinder No. 1.
8. Ensure clearance is within specification. Refer to the «VALVE CLEARANCE SPECIFICATIONS (V6)»(/toyota/camry/v30-1990-1994/remont/adjustments/#engine-controls-adjustments-v6) table. If valve clearance adjustment is required, rotate crankshaft pulley so camshaft lobe is facing upward on the valve to be adjusted.
9. Position adjusting shim notch area in the direction in which adjusting shim will be removed. Use Valve Clearance Adjuster (SST 09248-55020) and SST (A) to press valve lifter downward. (Scheme 30)
10. Install SST (B) between camshaft and valve lifter. Remove SST (A). Using a small screwdriver and magnet, remove adjusting shim. Using micrometer, measure thickness of adjusting shim removed.
11. Using measured clearance and adjusting shim thickness, determine correct thickness of adjusting shim to be used. Determine correct thickness of adjusting shim to be used by subtracting appropriate valve clearance specification (See «VALVE CLEARANCE SPECIFICATION»(/toyota/camry/v30-1990-1994/remont/adjustments/#engine-controls-adjustments-v6) Table) from measured valve clearance. Add this number to thickness of old shim. Select a new shim with a thickness as close as possible to the calculated value.
12. Using SST (A), press downward on valve lifter and remove SST (B). Recheck valve clearance. Install valve cover.

IGNITION TIMING

1. Warm engine to normal operating temperature. Shut engine off. Connect timing light. Connect tachometer to proper terminals of engine check connector. (Scheme 33)& 5.
2. Install jumper wire between proper terminals of engine check connector. (Scheme 35)& 7. Start engine and ensure idle speed is within specification. Ensure base timing is within specification with engine at specified RPM. See «V6 IGNITION TIMING (DEGREES BTDC @ RPM)»(/toyota/camry/v30-1990-1994/remont/adjustments/#engine-controls-adjustments-v6) table. NOTE: Timing marks are on front cover on all models except Land Cruiser. On Land Cruiser, timing mark on flywheel must be aligned with pointer positioned above starter motor.
3. Adjust timing by rotating the distributor.
4. Remove jumper wire from engine check connector and ensure advance timing is within specification. See «V6 IGNITION TIMING (DEGREES BTDC @ RPM)»(/toyota/camry/v30-1990-1994/remont/adjustments/#engine-controls-adjustments-v6) table. Tighten distributor hold-down bolt or cam position sensor bolt.

V6 IGNITION TIMING (DEGREES BTDC @ RPM) (1)

Scheme 33

Scheme 34

Scheme 35

Scheme 36

IDLE SPEED & MIXTURE

Note. Mixture adjustment is not possible on any model.

V6 IDLE SPEED

1. Install tachometer on proper terminals of engine check connector. (Scheme 33)& 5. Start engine and check if idle speed is within specification. See «V6 IDLE SPEED SPECIFICATIONS»(/toyota/camry/v30-1990-1994/remont/adjustments/#engine-controls-adjustments-v6) table.
2. If idle speed is not within specification, check Idle Speed Control (ISC) valve, wiring and ECU. See IDLE CONTROL SYSTEM in I - SYS/COMP TESTS article in this section. Remove tachometer.

Pickup & 4Runner

1. Install tachometer on proper terminals of engine check connector (Pickup) or ignition coil (4Runner). (Scheme 33)& 5. Start engine and operate at 2500 RPM for approximately 2 minutes.
2. Allow engine to idle and ensure idle speed is within specification. See «V6 IDLE SPEED SPECIFICATIONS»(/toyota/camry/v30-1990-1994/remont/adjustments/#engine-controls-adjustments-v6) table. If idle speed requires adjustment, remove rubber boot (if equipped) from throttle body. (Scheme 39) Adjust idle speed adjusting screw to obtain correct idle speed. Install rubber boot. Remove tachometer.

V6 IDLE SPEED SPECIFICATIONS (1)

THROTTLE POSITION SENSOR ADJUSTMENT

1. Disconnect electrical connector from Throttle Position Sensor (TPS). Loosen mounting screws. Connect ohmmeter between terminals IDL and E1 (MR2 2.2L with M/T) or E2 (all others). (Scheme 37)& 9.
2. Apply vacuum to throttle opener (if equipped). (Scheme 37)& 9. To set initial clearance, insert proper thickness feeler gauge between throttle stop screw and throttle lever. See «V6 THROTTLE POSITION SENSOR ADJUSTMENT»(/toyota/camry/v30-1990-1994/remont/adjustments/#engine-controls-adjustments-v6) table.
3. With ohmmeter showing no continuity, rotate TPS clockwise until continuity exists. Tighten mounting screws. Using specified feeler gauge, recheck adjusted clearance. Disconnect ohmmeter and install electrical connector on TPS.

V6 THROTTLE POSITION SENSOR ADJUSTMENT

Scheme 37

Scheme 38

Scheme 39

DASHPOT & THROTTLE VALVE OPENER CONTROL SYSTEM

For testing and adjustment procedures, see THROTTLE CONTROLS in I - SYS/COMP TESTS article in this section.

See also:
• VALVE CLEARANCE SPECIFICATIONS (V6)