ARP Rod Bolt Question?

[Anonymous]

Hey,

Can you reuse ARP rodbolts? I have to pull a piston this fall to and need to know if I can reuse the ARP rodbolts.

Number 4 cylinder is down in compression compared to the rest and I want to hone it out and rering it this fall.

No biggie if I need to replace the ARP rod bolts...got some extras in the shop.

Thanks,

Doug

 

[XFlow_Fairlane]

I thought that is why you buy the 289 rodbolt sets?

btw I got two pairs of them if you need an extra (or can't find yours)

 

[Anonymous]

I thought that is why you buy the 289 rodbolt sets?

btw I got two pairs of them if you need an extra (or can't find yours)

I have 2 more pairs left when I bought the 289 set I know you can reuse the head stud sets & main sets, just not for sure if yoou can reuse the rod set. Dont feel like changing them if I dont have to.

You can reuse the stock rod bolts....

Later,

Doug

 

['61 Draggin Wagon]

The only bolts that I've seen that aren't reusable are the torque-to-yield bolts that the newer cars are using.
Torque-to-yield means that you torque the bolt to a certain spec, then tighten it a set amount of degrees past that. Thereby stretching the bolt....
Darryl

 

[rbohm]

8) the arp rod bolts can be reused once or twice depending on mileage and stress. i have reused stock rod bolts without a problem, but i wouldnt do it again. arp's i would reuse without a second thought. well once or twice. after that i would replace them.

 

[Stubby]

I have freshened motors multiple times without problems.
In extreme applications or very high RPMs, you should measure the free length (without torque) and record each one. Then, when you freshen the motor, you remeasure and discard when they are measurably longer.

When you torque a bolt, you actualy stretch it. When you untorque it, it should return to it's normal length. If it doesn't, you have exceeded it's yeild point. The bolt also has to withstand the inertial loading of the piston and rod as they pass TDC, and also engine braking. (downshifting)

The most important things to consider.
How did the guy wuy who built the rods torque them?
Did he use oil?
Did he use ARP bolt lube?
There can be a huge amount of difference in clamping force.

 

[nitrousnick]

you can reuse the bolts,if you decide to replace them make sure you get the rod resized at a machine shop.

 

[Bort62]

As usual, Stubby is right.

However, I wouldn't even think twice about re-using them unless I had some reason to believe they had been damaged.

In most hardened steels the yield stress and ultimate tensile stress tend to be fairly close together.

What that means is, you aren't likely to yield them without breaking them. It would take some fairly carefully applied torque to manage it.

So - go for it.

 

[Anonymous]

Okay,

Thank You Sirs!!

Reuse them I will.