6.4L Power Stroke diesel
Material: 8740 Chrome Moly
8740 CHROME MOLY: Until the development of today’s modern alloys, chrome moly was popularly considered a high strength material. Now viewed as only moderate strength, 8740 chrome moly is seen as a good tough steel, with adequate fatigue properties for most racing applications, but only if the threads are rolled after heat-treatment, as is the standard ARP production practice. Typically, chrome moly is classified as a quench and temper steel, that can be heat-treated to deliver tensile strengths between 180,000 and 210,000 psi.
Yield strength: 180,000 psi
Installation Instructions
Part Number: 150-2506
Application: FORD 6.4L POWERSTROKE DIESEL
Crankshaft Flange Bolt- Installation
[1]
Please check the part-number(s) for your application
against the part-number(s) listed on the instruction
sheet.
[2]
Position the chamfered side of the washer on the bolt
so it faces the bolt head. This is done to clear the
radius on the under head of the bolt. Note: Improper
installation of the washer will cause premature bolt
failure.
[3]
Lubricate the threads of the bolt with LOCTITE 242
and the under head of the bolt with ARP ULTRA-
TORQUE FASTENER ASSEMBLY LUBRICANT.
[4]
Remove, replace and tighten one bolt at a time using
an alternating or criss cross pattern. Warning:
Replacing more than one bolt at time will result in
engine vibration and premature transmission
wear. DO NOT remove all the bolts at once.
[5]
Torque the bolts to 100 ft lbs using the specified
lubricants in Step 3.
If you have any questions or need additional information
please contact us at (805) 339-2200 or by FAX at (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. 
