Rod bolt stretch guage
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Rod bolt stretch guage
I'm confused exactly what the procedure on installing rod bolts useing a stretch guage. Like lets says bolts have a .005-.007 stretch /45 lbs of torque.Do you use a torque wrench to tighten them to 45lbs than use the guage and stretch them ? Or do you just barely tighten the bolts like hand tight than just stretch them to 007.
#2
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Re: Rod bolt stretch guage
I'm confused exactly what the procedure on installing rod bolts useing a stretch guage. Like lets says bolts have a .005-.007 stretch /45 lbs of torque.Do you use a torque wrench to tighten them to 45lbs than use the guage and stretch them ? Or do you just barely tighten the bolts like hand tight than just stretch them to 007.
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Re: Rod bolt stretch guage
I'm confused exactly what the procedure on installing rod bolts useing a stretch guage. Like lets says bolts have a .005-.007 stretch /45 lbs of torque.Do you use a torque wrench to tighten them to 45lbs than use the guage and stretch them ? Or do you just barely tighten the bolts like hand tight than just stretch them to 007.
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Re: Rod bolt stretch guage
Bolt stretch is better but isnt nessesary. generally on a new set of connecting rods you want to torque and then retorque two more times. meaning do it once then loosen do it again and loosen and do it a third time. From my experience this gets you pretty close to bolt stretch specs, i never tighten more than manufacture specs on any of the times. This method has always worked for me but everyone has their own little things and tricks
#7
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Re: Rod bolt stretch guage
Bolt stretch is better but isnt nessesary. generally on a new set of connecting rods you want to torque and then retorque two more times. meaning do it once then loosen do it again and loosen and do it a third time. From my experience this gets you pretty close to bolt stretch specs, i never tighten more than manufacture specs on any of the times. This method has always worked for me but everyone has their own little things and tricks
even with new bolts, the stretch is different. You do check the stretch because not every bolt is made the same.
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Re: Rod bolt stretch guage
It just seems to me that If i torqued it to 45ft/lbs it just so much more tighter you putting more effort into it, Than if you snug the bolts up by hand and than used a box wrench and strtech it to 005 or what ever the specs are. Is this true if you just snug up the bolts with your hand/ rachet than stretch the bolts will it be tight enought.
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Re: Rod bolt stretch guage
well rod bolts arent supposed to be super tight, there are alot of forces at work trying to pull those end caps off lol.
Turbogixxer i dont dissagree with you but ive NEVER dont bolt stretch on my rod bolts and ive never had a problem
Turbogixxer i dont dissagree with you but ive NEVER dont bolt stretch on my rod bolts and ive never had a problem
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Re: Rod bolt stretch guage
The recommended torque usually puts you within the range of bolt stretch required for that bolt where checking the amount of stretch isn't required, but it is still a good idea. I've literally checked dozens of set of rods and I've never seen a new bolt stretch anymore than maybe .0001" more than the others of the same set, and I have never seen the recommended torque value stretch a bolt too much or too little with the correct lube.
If you're talking used bolts, then yes, I think it is absolutely required.
#11
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Re: Rod bolt stretch guage
The tensile strength better be damn near perfectly matched in all the bolts. This is not 1958, the bolts are very consistent. if your getting different numbers you have problems with lube, dirt, thread issues etc.
#12
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Re: Rod bolt stretch guage
No.
The recommended torque usually puts you within the range of bolt stretch required for that bolt where checking the amount of stretch isn't required, but it is still a good idea. I've literally checked dozens of set of rods and I've never seen a new bolt stretch anymore than maybe .0001" more than the others of the same set, and I have never seen the recommended torque value stretch a bolt too much or too little with the correct lube.
If you're talking used bolts, then yes, I think it is absolutely required.
The recommended torque usually puts you within the range of bolt stretch required for that bolt where checking the amount of stretch isn't required, but it is still a good idea. I've literally checked dozens of set of rods and I've never seen a new bolt stretch anymore than maybe .0001" more than the others of the same set, and I have never seen the recommended torque value stretch a bolt too much or too little with the correct lube.
If you're talking used bolts, then yes, I think it is absolutely required.
Everyone of you are ASSuming the bolt was machined correctly. It takes 10 mins to check the stretch. You are just being lazy.
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Re: Rod bolt stretch guage
Like I said, I have torqued dozens of sets of rods and never have I seen one stretch more than the other. It's not a bad idea to use it, but in my experience, it isn't required.
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