Material: ARP® 3.5
ARP3.5® (AMS5844): While similar to Inconel 718, these super-alloys are found in many jet engine and aerospace applications where heat and stress attack the life of critical components. The high cobalt content of this alloy, while expensive, delivers a material with superior fatigue characteristics and typically tensile strength in the 260,000 psi range. The immunity to hydrogen embrittlement and corrosion of these materials is a significant design consideration. These materials are primarily used in connecting rods where extremely high loads, high RPM and endurance are important factors – Formula 1, NASCAR and CART applications.
Tensile strength: 260,000 psi
Installation Instructions
Part Number: 300-6609 & 300-6629
Application: CARILLO REPLACEMENT 1.400 U.H.L.
Cap Screw without Washer - Rod Bolt Installation
[1]
Please check the part-number(s) for your application
against the part-number(s) listed on the instruction sheet.
[2]
Make sure there is an adequate chamfer around the bolt
hole on the connecting rod cap to clear the radius under
the head of the bolt.
[3]
Use ARP Ultra-Torque Fastener Assembly Lubricant
to lubricate the threads of the bolt and the under head of
the bolt. Then install the bolts and tighten them hand
tight.
[4]
ARP recommends using the STRETCH METHOD when
tightening rod bolts. Following the instructions for using a
stretch gauge, Stretch the bolts to . 0045 - . 0050 .
[5]
If you do not have a stretch gauge, torque the bolts to
_ 15 ft-lbs (20.3 Nm) using ARP Ultra-Torque Fastener
Assembly Lubricant.
[6]
The connecting rods should always be re-sized after new
rod bolts are installed.
[7]
A log should be kept on the original non-torqued length
of each bolt. Bolts that have any permanent deformation
or have increased in non-torqued length by more than
.001 in. should be replaced.
If you have any questions or need additional information please
contact us at (805) 339-2200 or by FAX (805) 650-0742
⚠ This is an automatically generated translation and unit conversion. Always refer to the original ARP instruction sheet for exact specifications. Errors may occur. 
