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| Head Bolt install Q. https://slantsix.org/forum/viewtopic.php?t=34775 |
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| Author: | wjajr [ Thu Apr 09, 2009 9:24 am ] |
| Post subject: | Head Bolt install Q. |
I have chased female & male threads before installing my head, and stock torque for them is 65 lb ft. I now have higher than stock compression at 9.5 to 1. Should a higher torque be used, and is any type of thread locker recommended when installing head bolts? |
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| Author: | Joshie225 [ Thu Apr 09, 2009 9:31 am ] |
| Post subject: | |
You should be fine at 65 ft/lbs with oiled threads. You do not need a sealer as no head bolts enter the water jacket. |
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| Author: | Charrlie_S [ Thu Apr 09, 2009 10:43 am ] |
| Post subject: | |
If the head has been milled, more then about .075, I would reccommend hardened washers under the bolt heads. Doesn't hurt in any case. |
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| Author: | wjajr [ Thu Apr 09, 2009 12:08 pm ] |
| Post subject: | |
I'm right at 0.075", and the block has been milled some time in the past so I will use washers. Would the need for grade 8 washers be for a spacer so as not to bottom out the bolt? |
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| Author: | Shaker223 [ Thu Apr 09, 2009 12:12 pm ] |
| Post subject: | |
Yup |
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| Author: | Joshie225 [ Thu Apr 09, 2009 12:32 pm ] |
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You need fourteen 7/16" hardened washers. They make them just for head bolts which are thicker than your standard Grade 8 washers. |
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| Author: | Dart270 [ Thu Apr 09, 2009 1:04 pm ] |
| Post subject: | |
Hm, never heard of this. I have taken 2 heads down 0.100/0.200" angle mill and not had bottoming issues. Washers are not a bad idea, though. I always run mine up to 75-80 ft-lbs, but most people look at me funny. Never broken a head bolt or damaged anything, and never had a head gasket problem (at least 6 heads and about 30 head gaskets used). Just my 2 cents... Lou |
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| Author: | ceej [ Thu Apr 09, 2009 1:06 pm ] |
| Post subject: | |
Another option is the ARP head stud kit. It is overkill for a street engine, but it's very nice to work with. Torque accuracy is better with the studs as well. If you've cut the head/block, the stud length isn't an issue. When removing or installing the head, removing the studs will likely be necessary to clear the firewall and items attached to it. I pull the studs for comfortable clearance in my Valiant. CJ |
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