Question about 1986 Chevrolet Astro Cargo
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Posted on Jan 02, 2017
SOURCE: head tourque specs
The Haynes manual says for 96 - 98 to torque the head bolts to 22 ft lbs and
than the short bolts 45 degrees, medium 55 and long 65 degrees
Those bolts are "Torque To Yield" bolts. You should be using new head bolts, tighten them to the spec listed and then rotate them the additional degrees of rotation that is specified. This assures that the bolts are tightened to a maximum clamp load.
To start out with, be sure to torque from the center out and there is a designated sequence to go in
Posted on Aug 25, 2008
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
SOURCE: tourque specs for 1968 camaro
Do you mean the tightness of the ball joint nuts? If you do use 55lbs, then tighten further if cotter pin hole does not line up. DON'T back off to get pin to go in!
Posted on Apr 18, 2009
SOURCE: 4g67 head tourqe settings
Just to add to previous solution...
Assuming your head is straight & without defects, ensure you follow the correct tightening sequence diagram (see numbers) below:
Front of engine
n 10 8 x
a 4 6 a
e 2 1 s
i 7 9 i
1) Apply a small amount of engine oil to the thread section of the bolt and install so the chamfer of the washer faces upward.
2) In the proper tightening sequence (as shown above), torque bolts initially to 22 ft.lbs. (30Nm)
3) In the proper tightening sequence, now torque bolts to 45 ft.lbs. (61Nm)
4) In the proper tightening sequence, finally torque bolts to 68 ft.lbs. (92Nm)
Now you can Install the Camshaft sprocket and tighten it to 65 ft.lbs. (90Nm), while holding sprocket in place using the correct wrench.
Confirm proper timing mark alignment.
Posted on Aug 17, 2009
Posted on Sep 17, 2009
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