I am putting diferant heads on my 403 olds. I need head tourqe specs for 403 olds and bolt tightening diagram
Fig. : Cylinder head torque sequence, 260, 307, 350 403
Oldsmobile built engines
On the V8, tighten the bolts, in the sequence illustrated, to 100
ft. lbs. When all bolts have been tightened to this figure, begin the
tightening sequence again, and torque all bolts to 130 ft. lbs.
On V6's, tighten all head bolts in sequence to the following
torques:
* All except bolts 5, 6, 11, 12, 13 and 14 - 100 ft. lbs.(19-135.5
Nm)
* Bolts 5, 6, 11, 12, 13, and 14 - 41 ft. lbs. (19-55.5 Nm)
* All bolts except 5, 6, 11, 12, 13, and 14 - 142 ft. lbs. (19-192.5
Nm)
* Bolts 5, 6, 11, 12, 13, and 14 - 59 ft. lbs. (19-80 Nm)
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DO NOT use any sealing material.
Caution!Refer to Fastener Notice in Cautions and Notices.
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Tighten
Tighten the bolts to 30 N•m (22 lb ft) plus an additional 155 degrees using the J 45059 .
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Tighten
Tighten the bolts to 35 N•m (26 lb ft).
Install pushrode and rocker arms and rocker arm nuts. Tighten nuts to 22 ft. lbs. (30 Nm).
Install valve cover and tighten bolts to 89 inch lbs. (10 Nm).
Cylinder Head Tightening Torque and Sequence.4,027 views
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