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#21652 10/14/2003 7:20 PM | Joined: Mar 2003 Posts: 313 'Bolter | | 'Bolter Joined: Mar 2003 Posts: 313 | I have got a used 36 Olds head comming for my GMC this week. After I get it Magnafluxed, tanked and milled, should gasket sealer be used on the head gasket. I can get a NOS copper gasket or a composite gasket. Either one better than another? Finally, any idea on torque for the head bolts? Manual says to tighten, run to operating temp and retighten. | | |
#21653 10/14/2003 7:33 PM | Joined: Jun 2000 Posts: 2,773 'Bolter | | 'Bolter Joined: Jun 2000 Posts: 2,773 | Is the composite headgasket made from the newer material with the blue coating? If so, use it without sealer. If not, I would use the copper and spray with the copper headgasket sealer.
What diameter are the head bolts? Are they new or old?
Fred
52 3600
69 C-10
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#21654 10/15/2003 1:05 AM | Joined: Mar 2003 Posts: 313 'Bolter | | 'Bolter Joined: Mar 2003 Posts: 313 | Going to get new bolts, the old ones are 7/16 in diameter. | | |
#21655 10/15/2003 2:25 PM | Joined: Jun 2000 Posts: 2,773 'Bolter | | 'Bolter Joined: Jun 2000 Posts: 2,773 | I'd go 80-85 ft-lb. Due to the age and value of the head, I'd also tighten 4 or 5 times instead of the usual 3. Lube the bolts with motor oil, or anti-sieze. If anti-sieze is used, reduce torque values by 10%.
Fred
52 3600
69 C-10
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#21656 10/16/2003 7:12 PM | Joined: Mar 2003 Posts: 313 'Bolter | | 'Bolter Joined: Mar 2003 Posts: 313 | Thanks, Fred for the info. | | |
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