BB Ford 390-428 main bolt kit
Applications
Ford - Big Block 390
Ford - Big Block 391
Ford - Big Block 406
Ford - Big Block 410
Ford - Big Block 427
Installation Instructions
Automotive Racing Products
Tel: (805) 339-2200
1863 Eastman Avenue. Fax (805) 650-0742
Ventura, Ca. 93003
www.arp-bolts.com
INSTALLATION METHOD FOR HIGH PERFORMANCE SERIES MAIN BOLT KITS
Part Number: 155-5201 Application: 390-428 FE Series Ford (2 bolt main)
Please Note: If you are not using a windage tray there may be a clearance issue between the oil pan and the head of the
bolt on the rear main cap. The washers on this main cap may be omitted to allow adequate clearance. Clearance should
always be checked regardless.
1.
To ensure proper thread engagement and accurate torque readings, clean ALL threads in the block. Chase the
threads if necessary with ARP Thread Chaser, part number 911-0005 (1/2-13).
2.
Clean and inspect all hardware prior to installation. Look for obvious defects or shipping damages, plus proper
fit, length and dimension.
3.
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.
4.
Install the main caps and check for binding or misalignment.
5. Lubricate the under head of the bolt, the washers and the bolt threads with ARP ULTRA-TORQUE FASTENER
ASSEMBLY LUBRICANT. Then install the bolts into the cylinder block and tighten them hand tight. ARP
recommends using the ARP ULTRA-TORQUE FASTENER LUBRICANT that is provided with each kit as
opposed to motor oil. This is due to higher friction on the bolts as well as inconsistencies in the clamping force of
the fasteners when motor oil (or low quality lubricant) is used.
PRELOAD (TORQUE) RECOMMENDATIONS
6.
Following the manufacturer’s recommended torque sequence, tighten the bolts in three equal steps to 100 ft lbs
with ARP ULTRA-TORQUE FASTENER ASSEMBLY LUBRICANT.
Footnote: When changing from factory fasteners to high strength fasteners, clamping force and tolerances will
change, therefore it will be necessary to check the main bearing bores for proper size and out of round condition
after installation of the bolts and align hone the cylinder block if necessary. The main bores should always be align
honed using the same fasteners and lubricant which will be installed during final engine assembly at the
recommended preload.
Bolt Torque Sequence
!
revised - 2/24/2015
⚠ This is an automatically generated translation and unit conversion. Always refer to the original ARP instruction sheet for exact specifications. Errors may occur. 
