C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

ARP Head bolts

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Old Jul 17, 2020 | 09:52 PM
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Default ARP Head bolts

Hello,

Getting ready to torque the heads down tonight.

ARP paper in my box says 70lbs. Doesn't specify for aluminum or a different number for the short bolts.

I have looked over many threads here and it sounds like most go to 65 on the long ones and 60 on the short ones.

Do I follow ARP and go 70 on all or less on the shorter ones?

Thank you
Doug
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Old Jul 18, 2020 | 01:32 PM
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ARP knows their stuff....always follow the directions they give. And use the assembly line they provide.
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Old Jul 18, 2020 | 05:38 PM
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I'm following APR's advice when I change my heads. They are aluminum aftermarket. The manufacture of the heads suggested APR bolts and to follow the APR instructions.
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Old Jul 18, 2020 | 06:19 PM
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I torque to 70 with ARH bolts and aluminum heads.
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Old Jul 18, 2020 | 08:11 PM
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I used arp bolts on my Edelbrock heads. The doco that came with the heads said 65 ft pounds in three steps (40,55,65). So that’s what I did. Haven’t blown a head gasket yet.

Edit: Also always use a quality head gasket if you don’t want future problems. For Aluminum heads a Fel-Pro FE1010 is the go.

Last edited by GregMartin; Jul 18, 2020 at 08:20 PM.
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