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Posted on Jan 02, 2017
SOURCE: tightening head
New Headbolts are recommended
Long bolts are torqued to 46'lbs + 90 degrees.
Short bolts are torqued 43'lbs + 90 degrees.
Start in the center, and work to the edges, torquing the bolts in two stages.
Rockers are torqued to 22'lbs.
Posted on Dec 21, 2008
Head bolts are torque to yeild so you MUST use new bolts.
Tighten cylinder head retaining bolts in numerical sequence in three steps as follows:
Posted on Mar 19, 2009
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)
Hope this help (remember comment and rated this).
Posted on Mar 29, 2010
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