Subject	I think the maximum thread engagement in the block is best
Posted by	LitlElvis on October 04, 2011 at 10:36 AM
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In Reply To	How do you install you ARP head bolts? posted by toykoz32 on October 04, 2011 at 02:57 AM
Message	since the cast iron is by far, the weakest link in the assembly. I loosely bottom the studs (I assume you meant studs, not bolts) in the block with some oil or grease on the threads to prevent corrosion, then liberally lube the upper fine threads, washers and nuts with ARP lube. Something that's worthwhile after the initial torquing of the heads is to heat up the block and heads with a heat gun aimed into the main cooling passage. It'll take a half hour to get everything up to 200°F, let it all cool and individually loosen and re-torque each nut - if you mark the nuts and studs before loosening them, you'll notice after the re-torque that the nuts will have tightened up a bit more.
Follow Ups	How do you install you ARP head bolts? - toykoz32 02:57:08 10/04/11 I install them by hand until they bottom - aliaZ 08:04:12 10/04/11 Why do you back them out ? (n/m) - ztunerz 09:55:24 10/04/11 ARP recommends it (n/m) - Russell@Z1 10:43:29 10/04/11 Understand but what is the reasoning behind this ? (n/m) - ztunerz 10:50:55 10/04/11 I would suppose that if the stud is bottomed out before - kkrofft (OH) 11:00:44 10/04/11 Makes sense. (n/m) - BigTDogg (MA) 11:18:32 10/04/11 that would imply that the resistance of the threads - ztunerz 13:02:23 10/04/11 Sure. But it could happen and by providing this instruction - kkrofft (OH) 13:15:40 10/04/11 not really because assuming >> - ztunerz 14:49:36 10/04/11 And, the threads are not perfect all the way to the bottom - zellamay 13:04:53 10/04/11 first, i recommend chasing the threads ALWAYS with a - ztunerz 14:54:10 10/04/11 If you have a tap, you can see that the threads are not - zellamay 16:03:28 10/04/11 Studs are supposed to have a shoulder on them - BlackholeZ 13:06:46 10/04/11 on arps installation FAQ nowhere do i see - ztunerz 14:58:39 10/04/11 Yes, I didn't see it either. Maybe they figure that if - zellamay 16:06:37 10/04/11 because bottoming them out can result in the stud - aliaZ 15:25:39 10/04/11 Finally a reasonable answer (n/m) - ztunerz 21:05:41 10/04/11 When you "bottom them out", the stud is probably not - zellamay 22:14:52 10/04/11 You torque them down because the bolts/studs stretch - soulpwr 10:17:06 10/04/11 I think the maximum thread engagement in the block is best - LitlElvis 10:36:20 10/04/11 Yea I meant stud . . . ill give the heat gun trick a try (n/m) - toykoz32 14:26:49 10/04/11 i have often gone in and retorqued the studs after - ztunerz 14:51:56 10/04/11 This is how I was taught to do it... - na300zx (OH) 17:09:00 10/04/11
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