Got the ARP bolt out......BUT!!!
03-11-2009, 12:32 AM
#5
Well how big of a piece of threads came out? If it was substantial then you'll need to have it corrected, otherwise I would run a tap down through it (Same size as the original bolt obviously) to clean the threads up and then just go with it. Should be fine. BTW, I'm sure you already know this but be sure to use a new bolt...
03-11-2009, 04:52 AM
#6
I would use a thread chaser. A tap will remove material, something you may not want to do with the damage already in the threads. If you are using an ARP bolt, lube it good with ARP moly lube and run it in and out a few times by hand to make sure you have good threads. Lube the washer as well. Then put several washers under it to space it out as if the pulley was in place and see if the crank threads will take the required 190 lb-ft of torque that the ARP bolt requires when their lubricant is used. If that holds you should be able to install the pulley using the correct tools (not a bolt of any kind).
That damage was likely not done by the ARP bolt but rather during the removal/installation process if you used a bolt to push against with the puller or used a bolt to re-install (even a longer bolt). In other words, if you followed the procedures in LS1howto.com, that was likely the original source of the thread damage.
That damage was likely not done by the ARP bolt but rather during the removal/installation process if you used a bolt to push against with the puller or used a bolt to re-install (even a longer bolt). In other words, if you followed the procedures in LS1howto.com, that was likely the original source of the thread damage.
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03-11-2009, 09:54 AM
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03-11-2009, 09:55 AM
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03-11-2009, 11:10 AM
#15
The preload in the ARP bolt is determined by measuring torque, as opposed to the stock bolt which is preloaded through a pre-determined rotation. With either approach, the desired result is a known bolt stretch/preload in the joint. When you measure with a torque wrench, the biggest variable is the friction in the threads. The way to keep the friction so that it is consistent and predictable is to use a lubricant that provides the desired characteristics. The ARP Moly Lube is used to ensure a predictable friction in the joint. While they do say that 30W oil can be used, more consistent results are obtained with their lube. With where you currently stand and the problems you had, I would use the ARP Moly Lube and stick with the torque value provided by ARP.
03-11-2009, 05:11 PM
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The preload in the ARP bolt is determined by measuring torque, as opposed to the stock bolt which is preloaded through a pre-determined rotation. With either approach, the desired result is a known bolt stretch/preload in the joint. When you measure with a torque wrench, the biggest variable is the friction in the threads. The way to keep the friction so that it is consistent and predictable is to use a lubricant that provides the desired characteristics. The ARP Moly Lube is used to ensure a predictable friction in the joint. While they do say that 30W oil can be used, more consistent results are obtained with their lube. With where you currently stand and the problems you had, I would use the ARP Moly Lube and stick with the torque value provided by ARP.
