zxkimmo
Parking Attendant
Posts: 28
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posted April 01, 2003 11:48 AM
Carrillo bolt torque
I just got my new Carrillos for my ZX-12. Bolt torque is notified by bolt stretch, but I don´t have any kind of measure, with which I can measure the stretch. Has somebody tried what kind of torque is needed to get the wanted stretch?
   
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zrxdean
Needs a job
Posts: 2225
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posted April 01, 2003 04:18 PM
Kimmo, Kevin & I used an outside caliper to measure stretch with the rod on the crank, and I think it was equivalent to 45lbs torque. Here's the details from the Carrillo site;
BOLTS
All bolts should be lubricated under the heads as well as on the threads. We recommend the bolt lube supplied with the rods, or as an alternative, a molybdenum base paste mixed with engine oil.
The preferred method to torque the bolt is by using the stretch figure listed in the table below. In order to check bolt stretch, simply fixture one rod, leaving the cap portion free from clamping load. Measure both bolt lengths loose, then progressively tighten the bolt until the measured increase in length correlates with the figures below. Use your indicated torque reading to tighten all the connecting rods in final assembly.
TYPE OF BOLT
THREAD SIZE STRETCH
RECOMMENED TORQUE
NOT TO EXCEED
1/4 SPS-CARR .004 to .006 275 Inch Pounds
5/16 SPS-WMC5 .004 to .006 38 Foot Pounds
5/16 SPS-CARR .005 to .007 45 Foot Pounds
3/8 SPS-WMC6 .005 to .007 45 Foot Pounds
3/8 SPS-CARR .005 to .007 65 Foot Pounds
7/16 SPS-CARR .005 to .008 100 Foot Pounds
7/16 SPS-WMC7 .005 to .007 75 Foot Pounds
7/16 SPS-WMC7-1 .005 to .007 75 Foot Pounds
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kcadby
Pro
Posts: 1733
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posted April 01, 2003 04:45 PM
YEEEup...we ended up with the "max torq" on Dean's bolts to get the proper stretch...
We have a RodBolt Stretch Gauge here at work (I told them to buy it  ) but I didn't check the torq on the bolts I've used it on...
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zxkimmo
Parking Attendant
Posts: 28
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posted April 03, 2003 10:27 AM
Thank you very much, Kcadby and zxrdean, I will torque my bolts to 45 foot.
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