ARP Ultra Torque assembly lubricant makes
hardware assembly much easier!
Frictional inconsistencies in oil, molybdenum disulfide, and other common
lubricants require multiple cycles of bolt torquing, loosening, and retightening
to obtain the required preload or stretch. Typically, friction is at its highest
point and the preload value or stretch is low when a fastener is
first tightened. As the fastener torque is cycled several
times the friction decreases and the preload increases. This phenomenon is
called "preload scatter".
With this product, a fastener need only be torqued once to achieve within 5%
of ideal preload. Then, it remains consistent throughout all subsequent cycles
(from race-prep machining to final assembly). Inferior assembly lubricants lead
to torque inconsistencies. It is quite possible for adjacent head bolts or studs
to have vastly different preloads. This scatter causes bore distortion, hampers
piston ring seal, and leads to poor head gasket sealing. Pro engine builders
choose ARP Ultra Torque lubricant for a reason!