1991 LEXUS SC400 Service Repair Manual

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Page 2217 of 4087

LEXUS SC400 1991 Service Repair Manual 21. REMOVE THEFT DETERRENT HORN(a) Disconnect the connector. (b) Remove the bolt and theft deterrent horn. HINT: Remove the deterrent horn when the valve clearance is adjusted for the front portio

Page 2218 of 4087

LEXUS SC400 1991 Service Repair Manual Using compressed air and magnetic finger, removethe adjusting shim by blowing air into the shim hole. HINT: Remove the adjusting shim from the intake man- ifold side. NOTICE: Do not drop the adjusti

Page 2219 of 4087

LEXUS SC400 1991 Service Repair Manual (b) Determine the replacement adjusting shim sizefollowing Formula or Charts: w Using a micrometer, measure the thickness of the removed shim. w Calculate the thickness of a new shim so the valve cle

Page 2220 of 4087

LEXUS SC400 1991 Service Repair Manual Adjusting Shim Selection Chart (Intake) EM±20± ENGINE MECHANICAL Engine Tune±Up WhereEverybodyKnowsYourName

Page 2221 of 4087

LEXUS SC400 1991 Service Repair Manual ± ENGINE MECHANICAL Engine Tune±upEM±21 Adjusting Shim Selection Chart (Exhaust) WhereEverybodyKnowsYourName

Page 2222 of 4087

LEXUS SC400 1991 Service Repair Manual 23. REINSTALL THEFT DETERRENT HORN(a) Install the theft deterrent horn with the bolt. (b) Connect the connector. 24. REINSTALL RH CYLINDER HEAD COVER (a) Remove any oil packing (FIPG) material.

Page 2223 of 4087

LEXUS SC400 1991 Service Repair Manual (c) Install the gasket to the cylinder head cover. (d) Install the seal washer to the mounting bolt. (e) Install the cylinder head cover with the eight bolts. Torque: 5.9 NVm (60 kgf Vcm, 52 in. V

Page 2224 of 4087

LEXUS SC400 1991 Service Repair Manual (b) Install a new gasket and throttle body with the two boltsand two nuts. Torque: 18 N Vm (185 kgf Vcm, 13 ft Vlbf) HINT: Use bolts 40 mm (1.57 in.) in length. (c) Install the water by±pass pipe
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