Mean Green z28

iTrader: (17)

I've searched and come up short...

I have 234-4110 ARP studs on my 6.0ltr iron block. Worked fine until I blew a gasket, now I wanna make sure I put it back together right. I've long lost the box they came in, so short of calling ARP and bugging them about it, this is the best option. What are you guys torquing them down to?

The only specs I can find on their website is 90ft-lbs with 30wt. and 63ft-lbs. with ARP moly for the 11mm studs. There's other numbers for higher tensile strength studs, but this was the minimum numbers I copied from their catalog page 24 (http://www.arp-bolts.com/Catalog/Catalog.html) ... input?

niceguyyy01

iTrader: (13)

subscribing

SilverSS

iTrader: (30)

I just bought another set. This time it says 80ft-lb with ARP lube. 85ft-lb with motor oil. Up 10ft-lb from my last set.

vettenuts

iTrader: (4)

I don't have my ARP part number with me but those were the numbers I used and they were provided by ARP. My original instructions were 70 lb-ft. 22 lb-ft on the small ones as I remember.

Mean Green z28

iTrader: (17)

up! Was hoping to see more clarification into this...

Mean Green z28

iTrader: (17)

I guess more people get work done than work on cars themselves ...

thought a simple question like this would get more answers/unput

LS1BLKSS

iTrader: (36)

bump! gonna install the studs in a few need same info

vettenuts

iTrader: (4)

Those are the numbers straight from ARP. Why not just call them.

JPH

iTrader: (2)

Both 11/8mm studs in finger tight, then torque nuts to 35/65/85ft. lbs on 11mm nuts and 10/20/30ft. lbs on 8mm nuts with SAE30 motor oil! (chamfer side of washer down towards head also)

vettenuts

iTrader: (4)

I thought the chamfer was up.

BowtieBoyAV

I dont have ARP studs, but I know on the ARP bolts the chamfer side is up. It is there to match/mirror the small radius on the underside of the bolt's head.

KILLER-LS1

iTrader: (18)

I would highly recommend using ARP's Ultra torque lube. its like 5 bucks and will get you a much more accurate torque reading.

With ARP Ultra torque 80 lb/ft on the larger studs, 22 lb/ft on the smaller studs


From ARP's FAQ section

"1. Does the chamfer on the washer go up or down?

The chamfered side of the washer goes up toward the head of the bolt."

KILLER-LS1

iTrader: (18)

1. The friction factor changes from one application to the next. That is, the friction is at its highest value when the fastener is first tightened. Each additional time the fastener is torqued and loosened, this value gets smaller. Eventually the friction levels out and becomes constant for all following repetitions. Therefore, new fasteners should be tightened and loosened through several cycles before applying final torque. The number of times depends on the lubricant. For all situations where ARP lubricants are used, five cycles are required before final torquing.

JPH

iTrader: (2)

Up on a bolt, down for a stud the way i do it. Just look at the surface area of washer with the chamfer in it, and then flip it over and look at the other side? Then tell me which side you want the nut pushing down against?

KILLER-LS1

iTrader: (18)

Not true, chamfer ALWAYS faces toward head of bolt/nut

see my post https://ls1tech.com/forums/generation-iii-internal-engine/1226761-how-properly-install-torque-arp-fasteners.html

JPH

iTrader: (2)

Reread my post again. The chamfer side is designed for a bolt, it has no purpose for a stud. But good write up though.

SilverSS

iTrader: (30)

^^^^

I'm with you on that. All the chamfer side did for me was put a nice ring notch indention on the nut and less contact area. I'm going chamfer down from now on.