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-   -   How many times do you Torque new Rod Bolts? (https://www.offshoreonly.com/forums/general-q/152802-how-many-times-do-you-torque-new-rod-bolts.html)

1BIGJIM 03-04-2007 04:45 PM

How many times do you Torque new Rod Bolts?
 
I have been doing it twice on new bolts. I would have to assume the machine shop does this also when they put in the bolts and resize the rods.

I have been doing it the same way for 25 years:rolleyes: and just curious what everyone else is doing.

cariveau 03-04-2007 04:56 PM

I don't think you need to do it twice if you are using high quality ARP or better rod bolts.

BillK 03-04-2007 08:54 PM

Jim,
ARP recommends torqueing them 3 times. Supposed to "equalize" the friction so you get a more accurate clamping force when using a torque wrench. I usually do them at least twice. I would think that if you are using a rod bolt stretch gauge to tighten them it would not matter how many times.

Bill Koustenis

cariveau 03-05-2007 07:08 AM

I thought you should always use a stretch guage.

1BIGJIM 03-05-2007 08:36 AM

Thanks for the replys.

Crazyhorse 03-06-2007 06:53 PM


Originally Posted by cariveau (Post 2046918)
I thought you should always use a stretch guage.

Ideally a stretch gage should be used. The specified torque numbers are developed by the fastener manufacturer so that the torque value will closely match the stretch values.


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