1991 LEXUS SC300 Service Repair Manual

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Page 1657 of 4087

LEXUS SC300 1991 Service Repair Manual INSPECTION AND ADJUSTMENT OF VALVE CLEARANCE HINT: Inspect and adjust the valve clearance when the en- gine is cold. 1. DISCONNECT CABLE FROM NEGATIVE TERMINAL OF BATTERY CAUTION: Turn the ignition

Page 1658 of 4087

LEXUS SC300 1991 Service Repair Manual 6. REMOVE THROTTLE BODY WITH INTAKE AIRCONNECTOR (a) Disconnect the following hoses and connectors:(1) PCV hose (2) Three vacuum hoses (3) VSV (for EGR) connector (4) Throttle position sensor conne

Page 1659 of 4087

LEXUS SC300 1991 Service Repair Manual 9. REMOVE NO. 3, NO. 1 AND NO. 2 CYLINDER HEADCOVERS (a) Remove the 12 bolts and four nuts. (b) Remove the cylinder head covers and gaskets. 10. SET NO. 1 CYLINDER TO TDC/COMPRESSION (a) Turn th

Page 1660 of 4087

LEXUS SC300 1991 Service Repair Manual (c) Turn the crankshaft 2/3 of a revolution (240), check only the valves indicated in the illustration. Measure the valve clearance. [See procedure in step (b)] (d) Turn the crankshaft a further 2

Page 1661 of 4087

LEXUS SC300 1991 Service Repair Manual wPosition SST on the edge of the lifter for easy removal of the shim. w Remove the adjusting shim with a small screwdriver and a magnetic finger. (b) D e t e r m i n e t h e r e p l a c e m e n t a d

Page 1662 of 4087

LEXUS SC300 1991 Service Repair Manual ± ENGINE MECHANICAL Engine Tune±UpEM±15 WhereEverybodyKnowsYourName

Page 1663 of 4087

LEXUS SC300 1991 Service Repair Manual EM±16± ENGINE MECHANICAL Engine Tune±Up WhereEverybodyKnowsYourName

Page 1664 of 4087

LEXUS SC300 1991 Service Repair Manual 13. REINSTALL NO. 3, NO. 1 AND NO. 2 CYLINDER HEADCOVERS (a) Remove any oil packing (FIPG) material. (b) Apply seal packing to the cylinder head as shown in theillustration. Seal packing: Part No.
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