ARP harmonic balancer bolt
11-13-2007, 07:05 PM
#7
Team Owner
11-13-2007, 09:01 PM
#8
Le Mans Master
11-13-2007, 09:37 PM
#9
Le Mans Master
Member Since: Aug 2003
Location: American Canyon Lethal Injection
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Last edited by SLPRC5; 11-13-2007 at 09:40 PM.
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SG Lou (04-26-2018)
11-14-2007, 07:18 AM
#10
Team Owner
There are also a number of guys who have tightened this bolt to 250 lb-ft based on the ls1howto instructions not realizing that bolt stretch is based on many things other than torque, poor guys ended up replacing crankshafts or trying to drill out the pieces. If you want to use 235, feel free. If I were in your shoes, since you don't want to believe what several have told you here, call ARP again. This time ask for the head of tech.
Last edited by vettenuts; 11-14-2007 at 07:22 AM.
11-14-2007, 07:56 AM
#12
Drifting
Thread Starter
11-14-2007, 07:58 AM
#13
Drifting
Thread Starter
Yes I have, several times. We use their fasteners in many of our experimental projects at work. I have installed several of these particular bolts, have you???
There are also a number of guys who have tightened this bolt to 250 lb-ft based on the ls1howto instructions not realizing that bolt stretch is based on many things other than torque, poor guys ended up replacing crankshafts or trying to drill out the pieces. If you want to use 235, feel free. If I were in your shoes, since you don't want to believe what several have told you here, call ARP again. This time ask for the head of tech.
There are also a number of guys who have tightened this bolt to 250 lb-ft based on the ls1howto instructions not realizing that bolt stretch is based on many things other than torque, poor guys ended up replacing crankshafts or trying to drill out the pieces. If you want to use 235, feel free. If I were in your shoes, since you don't want to believe what several have told you here, call ARP again. This time ask for the head of tech.
11-14-2007, 08:10 AM
#14
Team Owner
Yes, follow the GM procedure until you get to the part about installing the new bolt. Don't lube the crank threads when you use the old bolt, or you will need to decrease the torque value accordingly. Lube the ARP bolt, washer and head when you install and run it in and out by hand a couple of times to lube the threads.
11-14-2007, 08:30 AM
#15
Drifting
Thread Starter
Yes, follow the GM procedure until you get to the part about installing the new bolt. Don't lube the crank threads when you use the old bolt, or you will need to decrease the torque value accordingly. Lube the ARP bolt, washer and head when you install and run it in and out by hand a couple of times to lube the threads.
11-14-2007, 02:16 PM
#16
Melting Slicks
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Breaking that bolt in the crankshaft would not be good!
04-26-2018, 07:37 AM
#19
Team Owner
Yes, as long as you use their lube (in bold in the instructions). That lube didn't exist when this thread was started. Not sure if there weren't other changes to the bolt itself, only ARP would know that. Torque is used to measure bolt preload/stretch, so changing the lubricant changes the friction and changes the torque value used to measure. Friction is the most important factor in accurate bolt preload determinate when using torque as the measuring tool.
Last edited by vettenuts; 04-26-2018 at 07:38 AM.
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desertguyj (11-06-2022)
04-26-2018, 12:07 PM
#20
Team Owner
