ARP Head Bolt Torque ?
- Thread starter powerband
- Start date
62Ranchero200
Famous Member
@powerband,
i used arp head studs.
since the head bolts/studs thread into the cast iron block (even with an aluminum head), no need for anti-seize.
for bolts i would use a bit of oil (except for the bolt that goes through the water jacket).
with the studs i used locktite blue - i want to be able to remove the nuts without the studs coming out with them. locktite actually has thread lubricating properties until it sets.
i used the torque steps in the ford six handbook.
thanks,
bob
i used arp head studs.
since the head bolts/studs thread into the cast iron block (even with an aluminum head), no need for anti-seize.
for bolts i would use a bit of oil (except for the bolt that goes through the water jacket).
with the studs i used locktite blue - i want to be able to remove the nuts without the studs coming out with them. locktite actually has thread lubricating properties until it sets.
i used the torque steps in the ford six handbook.
thanks,
bob
ARP fasteners require a much higher torque than stock OEM fasteners do because they a made from a higher quality of steel that has different metalurgic properties. So following a manual written for OEM fasteners and OEM procedures will be a mistake. Only following ARP's recommended torque and procedures for lubricants will ensure the best success using ARP fasteners.
ARP fasteners also depend on what psi rating the fastener is to determine the correct torque values. For their 7/16" head bolts, the 170,000/180,000 psi tensile strength fastener torque is 70 ft.lbs. The 190,000/200,000 psi tensile strength fastener torque 80 ft.lbs, and the premium 220,000 psi tensile strength fastener torque is 90 ft.lbs. So its also critical to know what psi tensile strength rating the fastener is to use the correct torque.
ARP fasteners also depend on what psi rating the fastener is to determine the correct torque values. For their 7/16" head bolts, the 170,000/180,000 psi tensile strength fastener torque is 70 ft.lbs. The 190,000/200,000 psi tensile strength fastener torque 80 ft.lbs, and the premium 220,000 psi tensile strength fastener torque is 90 ft.lbs. So its also critical to know what psi tensile strength rating the fastener is to use the correct torque.
Here's the ARP guide if interested:
http://arpinstructions.com/generaltorque.html
Dial or Beam type Tq' wrench preferred to see each fasteners' preload build to needed values.
have fun
http://arpinstructions.com/generaltorque.html
Dial or Beam type Tq' wrench preferred to see each fasteners' preload build to needed values.
have fun
If the Ford spec for torque was adequate why would it change? Not trying a smart as*, just genuinely curious. Light oil torque spec's. If bolts held at that, what's the difference? Seems like @ 80# bolt tq you may end up at a bit more pressure with the same # nuts and studs b/c of the physics of it.
Simply because Ford did not design, engineer or manufacture ARP Products, ARP designers and engineers did. One thing that is often overlooked is that any manufacturer, whether its Ford, Chevy or any other has specs in their service manuals that only are relevant to the OEM products they design and engineer themselves, they do not apply to any aftermarket product from other manufacturers. Would you look in a Ford manual to set the valve lash on your Crane cam? No, you look to the wisdom of the company that designed and made the products for that information. That is all Ford is doing as well, they are giving you the recommended torque specs from the companies that made the bolts for them, Ford didn't make them. If you choose to use other fasteners or any products that are not OEM, then you cannot expect to use OEM specs, you have to use that companies recommendations to achieve the intended results for those products. Once you start using aftermarket non-OEM components in your engine, you begin to see that many of the OEM specs including tune-up and factory timing settings become irrelevant pretty quickly, as they too are also affected by the replacement of OEM parts with aftermarket products like camshafts, larger carbs, headers and other go fast parts.
Gene Fiore
Famous Member
Does anyone know what the tensile strength is for the arp head studs that were previously offered by Classic Inlines?
Use the prt # & if not on enclosed littrature - go the ARP for the answer?
Use ARP 'enclosed' lube (except #13 - some kinda H2O proof snot) assure length does not bottom out and
tq supplied nuts (& enclosed washers) as researched…
May B I'm steppin on some1s BOLT thread ?!?
Use ARP 'enclosed' lube (except #13 - some kinda H2O proof snot) assure length does not bottom out and
tq supplied nuts (& enclosed washers) as researched…
May B I'm steppin on some1s BOLT thread ?!?
Gene Fiore":1s5nuvoi said:
Aren't the ones RichCreations came up with the same ones?CNC-Dude":1s5nuvoi said:
Links in the first post:
https://fordsix.com//viewtopic.php?f=1&t=74573
RichCreations
Well-known member
Econoline":eooz4hbu said:
yes, they are the 180,000psi...
