1991 LEXUS SC400 Service Repair Manual

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Page 1761 of 4087

LEXUS SC400 1991 Service Repair Manual REMOVAL OF CYLINDER HEADS (See Components on pages EM±58 and 59) 1. DISCONNECT TIMING BELT FROM CAMSHAFT TIMING PULLEYS (See steps 1 to 28 on pages EM±35 to 42) 2. REMOVE CAMSHAFT TIMING PULLEYS

Page 1762 of 4087

LEXUS SC400 1991 Service Repair Manual 5. REMOVE THROTTLE BODY COVER(a) Remove the mounting cap nut. (b) Loosen the two bolts, and remove the throttle bodycover. 6. DISCONNECT CONTROL CABLES FROM THROTTLE BODY Disconnect the followi

Page 1763 of 4087

LEXUS SC400 1991 Service Repair Manual 9. REMOVE TIMING BELT REAR PLATESRemove the two bolts and rear plate. Remove the two rear plates. 10. REMOVE VACUUM PIPE (a) Disconnect the following hoses:(1) (USA Spec.) Vacuum hose from throttle

Page 1764 of 4087

LEXUS SC400 1991 Service Repair Manual 11. (USA Spec.)REMOVE EGR VALVE (a) Disconnect the EGR valve connector. (b) Disconnect the following hoses:(1) Water by±pass pipe hose from ISC valve (2) Water by±pass hose from water by±pass pi

Page 1765 of 4087

LEXUS SC400 1991 Service Repair Manual (b) Remove the two bolts, two nuts, adaptor and gasket. (c) (USA Spec. only)Disconnect the EGR gas temperature sensor connec- tor. 14. REMOVE ISC VALVE (a) Disconnect the ISC valve connector. (b

Page 1766 of 4087

LEXUS SC400 1991 Service Repair Manual (b) Remove the two mounting bolts and two mounting nuts,and disconnect the throttle body from the air intake chamber. (c) Disconnect the following hoses, and remove the throttle body: (1) PCV hose

Page 1767 of 4087

LEXUS SC400 1991 Service Repair Manual (c) Remove the two bolts and gaskets, and disconnect theEGR pipe from the air intake chamber. (d) Remove the four mounting bolts, eight mounting nuts and following parts: (1) VSV for fuel pressure

Page 1768 of 4087

LEXUS SC400 1991 Service Repair Manual 24. DISCONNECT EGR PIPE FROM RH CYLINDER HEADRemove the bolt holding the EGR pipe to the RH cylinder head, and disconnect the EGR pipe. 25. DISCONNECT ENGINE WIRE FROM INTAKE MANIFOLD Remove the t
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