Building up a Zetec Turbo silvertop.

The ARP rod bolts i have come up on the ARP site as 'general replacement' torque to 55 lb/ft.

Having looked at some random builds, ARP 'Zetec pacific' bolts seem to be only 25 lb/ft.


Quite a large difference in settings


What should i torque to?


Thanks

 

Anyone ??

 

What part of the engine are these for?

I have only used ARP bolts for my engines con rods, and torque'd them upto Fords recommended setting, but using ARP's method.

 

You'll need to know the sepcific bolt specs aswell as conditions(dry, moly'd up etc). There will also be a difference going into OE rods and steels.

 

Its for conrod bolts. The code number of the arp's is 200-6209

55 lb/ft seems a hell of a load compared to the factory spec or zetec specific ones.

Forgot to say, their for Pec rods. Got the pistons and rods with the ARP's as a package

 

WTF are "Zetec pacific" bolts ?

Torque generally goes by fastener size. So what size are they ? Must be M9 or M10 or thereabouts ?

 

i may be wrong but arnt arp's stretch bolts? if so this would explain the higher torque setting although the setting you have mentioned doesnt sound overly tight for rod bolts

 

You are indeed wrong.

Whilst in reality all bolts will stretch when tightened, ARP do no make what are normally termed stretch bolts.

 

ah well just remember reading on an arp packet that x amount of torque was required for x amount of stretch!
even so, as said above that torque setting doesnt sound rediculously high a lot of rod bolts are similar settings then a x amount of degrees setting as well

 

These i have are ''general replacement''

ARP do pacific ones for your car

 

The Pacific is an ocean.

specific is something completely different

 

hahah fucks sake

 

Arp rate their bolts to be tightened to a specific stretch....not torque!

 

Bolts can be set by in number of ways, torque, angle or stretch are the ways that I have heard of, you may know of more.

ARP do recommend the stretch method, but not many people have a stretch gauge to hand, but hopefully they will have a torque wrench which will suffice for engines being built for a fast road car.

It is also important, as has been mentioned above, to torque the bolts with the threads prepared to the bolt manufacturers recommendations, and the torque procedure followed to the letter.

 

IIRC, Standard spec is 25 lb/ft, ARP Zetec bolts are 35 lb/ft with lube and these i have the code number says 55 lb/ft.

If your meant to go by bolt spec rather than car / rod spec then im probably better torquing to the indicated 55 lb/ft ?

 

Torque to ARP's specs using the correct lube unless someone intelligent has stated otherwise.