im a little confused about the way you tightened them? 2 passes at 30ft/lbs and a final at 50? so did you replace all the bolts first and torque them to 30 then check them again at 30 just to make sure they were all at 30 then do the final pass at 50?

 

I'm guessing he torqued them to 30, then lossened, then torqued to 30 again, then stepped up to 50. This process is usually refered to as burnishing, and helps to smoothe any imperfection in the threads on the bolt and rod, giving a more accurate and consistant stretch at the final spec.

and +99 on the write - nicely done!

 

hammertime pretty much hit the nail on the head with his explaination. Torque to 30 lb/ft, loosen, torque to 30 lb/ft, loosen, then torque one last time to 50 lb/ft. I did one bolt per cap at a time though. There's a bit of controversy over which method is right, but I chose to do it one bolt at a time.

 

whatever works i guess... i have bad luck when it comes to workin on my car, everyone elses car i work on nothin bad ever happens lol. if i decide to by rod bolts im goin with katechs and just gonna follow whatever instructions they supply, they wrote them for a reason lol.

 

everytime someone does a write up like this they should sticky it. have a big collection of writeups and we'll be able to do somthing then


mike

 

Not much get stickied in this forum. In the external forum though things get stickied. I think I even have a few writeups over there that got stickied.

 

which engines have the ferrules and how hard is it to remove them ?

 

Try a search for "ferrules". That topic has been gone over a lot.

 

I heard you needed to get something redone with the rods themselves when you do this as it changes the shape of them.... Im not sure exactly what, but is this necessary?

Just curious on that, but otherwise awesome writeup and good pictures, people need to do this kind of stuff more often. I feel guilty about not doing it myself but on the bright side i always take pics of installs so one day i just gotta sit down and make a write up.

 

This too is a subject of controversy. Some say you can not replace the capscrews without recondtioning the rod, but they are stuck in small block chevy land. Modern LS1 engines have a cracked cap on the rod. The fractured parting line positively locates the cap on the rod. Small block chevy's located the cap with the bolt, and would need to be reconditioned after changing bolts.

 

Thanks for the write up and nice pics.

I vote sticky it admin..please.

 

WOW-great write up and pics

 

Did you have someone to spin the crank for you as you went from rod to rod? Doing 3 passes on each bolt means you had to climb out from under the motor and spin the crank and climb back under again to do the next one unless you did them in pairs to save time. That's where a helper would come in real handy.

 

I turned over the engine myself with a breaker bar and a 24mm deep impact socket. I only had to turn it over 3 times and did it while I was under the car. And yes, I did them in pairs in order to save time. I think I did up to 8 bolts before I had to turn the crank. An extra set of hands would have helped tremendously though. Next time, I'll have my fiance give me a hand.

It'd be nice to have write-ups stickied, I know I've used a few here on the board.

 

Is this procedure good for ARP rod bolts install.

 

sticky this ****

great job!!! this is my next mod

 

Yes, same thing basically, just use the ARP recommended torque values. 40Lbs-ft for the ARP's.

 

yeah sticky definately, this thread will help reduce the number of them started from people who dont search.. oh yeah one more thing when you did your tightening procedure did you do it completely each bolt at a time? or did you do them all at 30, then loosen all and redo them at 30, then a final at 50

 

I performed the torquing (sp?) procedure one bolt at a time.

 

You will have to spin that sucker to 6000RPM and let us know how it holds together.

I am too nervous to put Rod Bolts in because my Z28 is my Daily Driver and if I spin a bearing for any reason I am SOL!!