1991 LEXUS SC400 Service Repair Manual

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Page 1689 of 4087

LEXUS SC400 1991 Service Repair Manual COMPRESSION CHECK HINT: If there is lack of power, excessive oil consumption or poor fuel economy, measure the compression pressure. 1. WARM UP AND STOP ENGINE Allow the engine to warm up to normal

Page 1690 of 4087

LEXUS SC400 1991 Service Repair Manual TIMING BELT COMPONENTS ± ENGINE MECHANICAL Timing BeltEM±23 WhereEverybodyKnowsYourName

Page 1691 of 4087

LEXUS SC400 1991 Service Repair Manual REMOVAL OF TIMING BELT (See Components on page EM±23)1. REMOVE WATER PUMP PULLEY AND RADIATOR (See steps 1 to 3, 6 and 7 on pages EM±64 and 66) 2. REMOVE NO. 3 AND NO. 2 TIMING BELT COVERS (a) R

Page 1692 of 4087

LEXUS SC400 1991 Service Repair Manual (a) Alternately loosen the two bolts, and remove them, thetensioner and dust boot. (b) Disconnect the timing belt from the camshaft timing pulleys. 6. REMOVE CAMSHAFT TIMING PULLEYS Using SST, r

Page 1693 of 4087

LEXUS SC400 1991 Service Repair Manual 8. REMOVE NO. 1 TIMING BELT COVERRemove the five bolts, timing belt cover and two gaskets. 9. REMOVE TIMING BELT GUIDE 10. REMOVE TIMING BELT HINT (When re±using timing belt): Draw an arrow on th

Page 1694 of 4087

LEXUS SC400 1991 Service Repair Manual INSPECTION OF TIMING BELT COMPONENTS 1. INSPECT TIMING BELTNOTICE:w Do not bend, twist or turn the timing belt inside out. w Do not allow the timing belt to come into contact with oil, water or stea

Page 1695 of 4087

LEXUS SC400 1991 Service Repair Manual (e) If there is noticeable wear on the belt teeth, check thetiming cover for damage, correct gasket installation and foreign material on the pulley teeth. If necessary, replace the timing belt. 2.

Page 1696 of 4087

LEXUS SC400 1991 Service Repair Manual (c) Measure the protrusion of the push rod from housingend. Protrusion: 7.7±10.5 mm (0.303±0.413 in.) If the protrusion is not as specified, replace the tensioner. INSTALLATION OF TIMING BELT (Se
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