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1971 LS5 intake bolt torgue

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Old 03-04-2018, 10:11 AM
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thelal1
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Default 1971 LS5 intake bolt torgue

Is it 35 lbs on cast iron the correct torque? If replacing chrome head bolts one at a time with stock bolts should I follow the same sequence of 1 to 16 as if I were starting from scratch?

Last edited by thelal1; 03-04-2018 at 10:16 AM. Reason: Need to specify
Old 03-04-2018, 10:29 AM
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c3_dk
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http://boxwrench.net/specs/chevy_bb.htm
Old 03-04-2018, 10:35 AM
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Alan 71
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Hi,
The 71 CSM indicates 30 lbs.ft. for intake manifold bolts for 350/454 engines.
Regards,
Alan
Old 03-04-2018, 10:42 AM
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thelal1
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Default Bolt removal

Should I start at sequence, removing 1 bolt at a time, or does it matter?
Old 03-04-2018, 12:02 PM
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HeadsU.P.
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Yes you should go in order, one at a time. And don't forget some thread sealant. I would go through all 16 at a torque value of 1/3 the final (=10lbs) the first time around. Then come back for the 2/3 torque value, then full torque.

Center bolts are about impossible to use a torque wrench on. Just get a feel for 30 lb with a boxend wrench.

Last edited by HeadsU.P.; 03-04-2018 at 04:16 PM.
Old 06-03-2018, 07:25 PM
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thelal1
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Default Signal lights

Originally Posted by Alan 71
Hi,
The 71 CSM indicates 30 lbs.ft. for intake manifold bolts for 350/454 engines.
Regards,
Alan
Alan,
Little help. Just started today. Replaced the alternator and started Vette up. I got outside car and noticed when checking signal lights. Front blinkers flash according to selection. Back signal lights both flash no matter what side selected.
Could it be a ground issue.or signal light switch.

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