i have a 5.394 LS eagle rod with the 5/16 arp rod bolts ....just want to know the torque spec on them..... thanks in advanced....


Modified by b20vtech at 10:39 AM 4/14/2007


Modified by b20vtech at 9:33 AM 4/20/2007

 

I believe its 40 lb ft.

 

should have not thrown instructions away. Give APR a call

 

bought it without the papers.... but anyone knows arp's number??

 

go here call eaglerod.com

 

beware of connecting rods without torque specs!!...but yea look for the arp part number...

 

I've got the same thing and it says on the box to torque it to 40 lb ft.

 

ok, im stuck now, if it's a 3/8 rod bolt, then u use a 3/8 12point socket right??

i don't get the termonology of the 5/16 and 3/8 rod bolt.....

 

torque wrenches are not allowed on arp rod bolts...use at own discretion

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b20vtech &raquo;</TD></TR><TR><TD CLASS="quote">ok, im stuck now, if it's a 3/8 rod bolt, then u use a 3/8 12point socket right??

i don't get the termonology of the 5/16 and 3/8 rod bolt.....</TD></TR></TABLE> Then do NOT assemble this yourself.

 

i have built alot of motors before, but with stock rod combonation, so of course im gonna attemp to do this myself.....

 

Please don't use a torque wrench on rod bolts

 

then what do i use???

 

a nice bolt stretch gage with .001" increments...you can try to burrow one if you can get access or you can buy them from summt racing i believe they come with a 2 lb. spring so it wont slip off the bolt ends...

 

thanks alot

 

you're welcome comrade

 

hey so u use a bolt stretch gauge to torque them down??? im confuse

 

 

isn't that to measure it after torquing??? or u could actually use that thing to torque it?? still confuse

 

Step 1: Use a torque wrench to tighten the bolts to something safe, like 35 ft-lbs.

Step 2: Use a ratchet or box wrench to continue tightening the bolts, in increments of about 1/16th of a turn. After each partial turn, put the gauge on the bolt and check how far it's stretched. If it hasn't stretched enough, remove the gauge and give the bolt another 1/16th of a turn.

Keep doing this until the bolt has stretched the appropriate amount. Be warned: the stretch increases exponentially as you approach the bolt's yeild strength. Translation: as you approach the correct stretch spec, you'll barely have to turn the bolt at all for it to continue stretching. I'm talking like 1/64th of a turn.

 

^^ in response to the above... you dont have to take the gauge off all the time to stretch it. your using the box end of the wrench so just lift up the wrench, then repeat.

one question i do have though,...
since you stretched the rod bolt initialy, how are you going to measuring again we you do a tear down and rebuild again using the same rods? since they were stretched already, what are you suppose to do?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by gsrious &raquo;</TD></TR><TR><TD CLASS="quote">^^ in response to the above... you dont have to take the gauge off all the time to stretch it. your using the box end of the wrench so just lift up the wrench, then repeat.</TD></TR></TABLE>

Easier said than done. Besides, for the most accurate results, I wouldn't rely on the gauge's spring pressure. I usually squeeze the ends together to make sure the pin is REALLY seated into the bolt dimple.


<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">
one question i do have though,...
since you stretched the rod bolt initialy, how are you going to measuring again we you do a tear down and rebuild again using the same rods? since they were stretched already, what are you suppose to do?</TD></TR></TABLE>

They don't stretch permanently - they only stretch when they are torqued. When you loosen them, they shrink back to their original length.

 

so whats stretch spec for the 5/16 arp rod bolt??

 

arp should give you the stretch specs along with their relative torque...the stretch specs comes from their tensile testing equipment...email them your part number and they should get back to you if you dont have your spec sheet...good luck