Harmonic balancer bolt torque ?
Thread Starter
Teching In
Joined: Jun 2010
Posts: 39
Likes: 1
From: Cumming, Ga.
Harmonic balancer bolt torque ? I'm installing my harmonic balancer bolt. I torqued the old bolt to 240 lb ft, installed the new bolt and torqued it to 37 lb ft. I was having trouble rigging up my cheapo torque angle gauge, so I decided to just eyeball the 140* twist. What concerns me is I've already gone to 240 lb ft, and I've only gotten about 90* of twist out of the bolt. I'm guessing it would take around 300 ft. lbs of torque or more to get to 140*. I guess I'm a little scared to go much beyond that. I sure don't want to break a 16mm bolt off in the crank. Does this sound normal, or did I screw up somewhere? thanks
Usually it is hard as hell to get to 140*, especially if you try to get it on multiple tries, it is a lot easier if you get it on the first try. I know it's a little late but some arp ultra lube on the bolt shoulder helps get to torque easier. If it feels like its gonna break then just leave it...unless you wanna buy another one. The arp crank bolt is def the way To go for a couple extra bucks.
I agree, the initial torque of the old bolt is to ensure the balancer is fully installed. When you torque the new bolt, you are stretching it to yield for proper clamp. I used an ARP bolt because all those TTY bolts are known to sometimes snap. Even then the ARP bolt torque spec is 240ish ftbs too.
I suggest pulling it out and buying an ARP bolt....I think they are only $10 or so.
I suggest pulling it out and buying an ARP bolt....I think they are only $10 or so.
Nothing against SDPC, but a lot of testing and engineering goes into ARP fasteners. They are worth the few extra dollars. Anything else is really just a grade 10.9 hardware store fastener. Don't get me wrong, I'm sure it will hold up fine, I'm just ****.
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Staging Lane
Joined: May 2007
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Trust me, from experience, the extra money for the ARP is cheap insurance.
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We firmly stand behind our product and with well over a thousand of these bolts sold and in use there is no doubt that users will experience performance equal to that of the ARP fastener when using our SDPC brand balancer bolt.
We understand that not all customers are looking for the same thing, so we stock and sell both the ARP bolt and our SDPC branded bolt in order to offer our customers the parts that they desire. In turn, you should understand that sometimes you are simply paying more for packaging and a name.
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WHIPPLE Superchargers, Procharger, Magnuson, Powerbond Sale, HPTuners packages!, Trickflow, AFR, PRC, CHE Trunion upgrade, $100 7.400" pushrod set, Custom Cam of your choice
Any reference to our bolt being related to a hardware store fastener is simply misinformed and uncalled for.
We firmly stand behind our product and with well over a thousand of these bolts sold and in use there is no doubt that users will experience performance equal to that of the ARP fastener when using our SDPC brand balancer bolt.
We understand that not all customers are looking for the same thing, so we stock and sell both the ARP bolt and our SDPC branded bolt in order to offer our customers the parts that they desire. In turn, you should understand that sometimes you are simply paying more for packaging and a name.
We firmly stand behind our product and with well over a thousand of these bolts sold and in use there is no doubt that users will experience performance equal to that of the ARP fastener when using our SDPC brand balancer bolt.
We understand that not all customers are looking for the same thing, so we stock and sell both the ARP bolt and our SDPC branded bolt in order to offer our customers the parts that they desire. In turn, you should understand that sometimes you are simply paying more for packaging and a name.
May I ask, who manufactures your bolt?
