Pro Main Stud Set
ARP main bearing cap studs are manufactured from 8740 chrome-moly steel, heat-treated in-house, 200,000 psi tensile strength, and precision J-form threads rolled after heat-treat to create a fastener that has threads 1000% stronger. All kits come complete with ten hardened parallel-ground washers and ten aerospace-grade nuts. Reduce crankshaft flex and main bearing cap fatigue with these premium quality main cap studs. Don't settle for anything less than the best! If you've increased your horsepower significantly, upgrade to our Main Cap Stud Set for added strength and reliability.
NOTE: Line Boring of the block is always recommended.
Contact our Tech Support Line for further information at 928-575-2174.
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Note: Images are for illustration purposes only. Images may not represent the product listed. Please contact customer service with any questions or concerns: 1-928-505-2501.
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To open a printable PDF version of this instruction CLICK HERE
1. Be sure to check thread pitch to make sure correct end goes into block (Allen head is the nut end).
2. Use 11mm x 1.25 tap to clean threads in the block. Use ARP Moly Lube and make sure each stud threads into block all the way.
3. Install main studs in block with 3/16 Allen wrench. Hand tight. Do not torque.
4. Install main caps over studs. Check cap alignment with the block especially check #3 cap where thrust bearings ride. Caps may require hole location to be enlarged to compensate larger stud O.D. If so use a 15/32-drill bit to enlarge hole. De-bur cap after drilling.
5. Install washers and nuts on studs, torque nuts to 80ft lbs using ARP Moly or Ultra-Torque lube.
Verify all bearing clearances are to spec. After final torque. Not verifying all bearing clearances can cause premature engine failure.
7. LC Engineering highly recommends line honing the block when using studs.
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