1991 LEXUS SC400 Service Repair Manual

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Page 1793 of 4087

LEXUS SC400 1991 Service Repair Manual (b) Install the exhaust manifold with the eight new nuts.Uniformly tighten the nuts in several passes. Torque: 39 N Vm (400 kgf Vcm, 29 ft Vlbf) (c) Install the main oxygen sensor. Torque: 44 N Vm

Page 1794 of 4087

LEXUS SC400 1991 Service Repair Manual B. Install cylinder head boltsHINT: wThe cylinder head bolts are tighten in two progressive steps (steps (c) and (e)). w If any one of the cylinder head bolts broken or deformed, replace it. (a) Appl

Page 1795 of 4087

LEXUS SC400 1991 Service Repair Manual (b) Remove any old packing (FIPG) material. (c) Apply seal packing to the bearing caps as shown. Seal packing: Part No. 08826±00080 or equivalent (d) (RH Cylinder Head)Install the bearing cap (ma

Page 1796 of 4087

LEXUS SC400 1991 Service Repair Manual (d) Insert a service bolt (A) into the service hole of thecamshaft sub±gear. (e) Using a screwdriver, align the service holes and teeth of the camshaft driven gear and sub±gear by turning camshaf

Page 1797 of 4087

LEXUS SC400 1991 Service Repair Manual (f) Install the other bearing caps in the sequence shownwith the arrow mark facing rearward. HINT: Align the arrow marks at front and rear of the cylinder head with the mark on the bearing cap. (g)

Page 1798 of 4087

LEXUS SC400 1991 Service Repair Manual (e) Check that the exhaust camshaft moves smoothly in the thrust direction. (f) Install the rear bearing cap with the arrow mark facing rearward. HINT: w Installing the rear bearing cap will determi

Page 1799 of 4087

LEXUS SC400 1991 Service Repair Manual (k) Alternately tighten the two bearing cap bolts on the rearbearing cap of the intake camshaft in several passes. Torque: 16 N Vm (160 kgf Vcm, 12 ft Vlbf) (l) Bring the service bolt installed in

Page 1800 of 4087

LEXUS SC400 1991 Service Repair Manual (f) Install the other bearing caps in the sequence shownwith the arrow mark facing forward. HINT: Align the arrow marks at front and rear of the cylinder head with the mark on the bearing cap. (g) A
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