Torque amount for a composite head gasket and ARP studs

MA70-3.0GT · 05-03-2013, 01:12 PM

I'd *personally*go with 75 if you're running studs/nuts to be honest, as the amount of torque that's required to produce the same downward pressure is less than the equivalent with bolts due to the reduced friction between nut/stud/washer compared to bolt thread/block thread and bolt head/washer... My reasoning being that 75-78lb/ft works fine for composite H/G and stock bolts so it should work fine with studs/nuts too. For ARP bolts on the other hand, I'd stick to their recommended torque.

Saying that, I don't think it'd do any harm to use ARP's recommended torques on studs/nuts either since, being the stud/nut or bolt manufacturers, they know what they're talking about & you won't be stripping any threads.

At the end of the day it's up to you but I don't think there'll be a problem using either setting as long as the lube you use is ARP too

05-03-2013, 01:12 PM	#2
MA70-3.0GT 12psi boost Join Date: Oct 2009 Location: Crewe, England Posts: 356	I'd personallygo with 75 if you're running studs/nuts to be honest, as the amount of torque that's required to produce the same downward pressure is less than the equivalent with bolts due to the reduced friction between nut/stud/washer compared to bolt thread/block thread and bolt head/washer... My reasoning being that 75-78lb/ft works fine for composite H/G and stock bolts so it should work fine with studs/nuts too. For ARP bolts on the other hand, I'd stick to their recommended torque. Saying that, I don't think it'd do any harm to use ARP's recommended torques on studs/nuts either since, being the stud/nut or bolt manufacturers, they know what they're talking about & you won't be stripping any threads. At the end of the day it's up to you but I don't think there'll be a problem using either setting as long as the lube you use is ARP too __________________ '89 MA70 Supra GT aero 3.0turbo JDM, Rebuilt motor, K&N intake, 3" stainless turbo-back. New turbo and braided line kit... '89 Honda NC27 400, NC23 cams, open pipe, PC36a shock & possibly Showa USD forks... '83 Yamaha 29R XJ750E-II, number 69 off the line, only runner in the country? Original except Koni shocks '95 Honda PC26 CB500R, Winter hack, hateful, trying to sell it I'm not paranoid, they really ARE after me!!!