FORD FLATHEAD (1938-48) W/OFFY HEADS HEAD STUD KIT
Applications
Ford - Flathead Generic - Flathead
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 HEAD STUD KITS
Part Number: 154-4103 Application: Ford Flathead (1938-48) w/ Offenhauser heads
1.
Always verify the part number for your application with the part number on the side of box and the part
number on the instruction sheet. This will help ensure you have the correct installation procedure for
your specific application before installing any components.
2.
Clean and inspect all hardware prior to installation. Look for obvious defects or shipping damages, plus proper
fit, length and dimension.
3.
To ensure proper thread engagement and accurate torque readings, clean ALL threads in the block. Chase if
necessary with ARP Thread Chaser, part number 911-0004 (7/16-14).
4.
Lubricate the block threads of the studs with ARP THREAD SEALER.
5.
Screw studs into the block “HAND TIGHT ONLY”.
6.
Install the cylinder head(s) and check for binding or misalignment.
7.
Lubricate the stud threads, nuts and washers with ARP ULTRA-TORQUE FASTENER ASSEMBLY
LUBRICANT. Then install the washers and the nuts onto the studs and tighten them hand tight. ARP
recommends using the ARP ULTRA-TORQUE FASTENER ASSEMBLY LUBRICANT that is provided with
each kit as opposed to motor oil. This is due to higher friction on the studs as well as inconsistencies
in the clamping force of the fasteners when motor oil or other low quality lubricants are used.
PRELOAD (TORQUE) RECOMMENDATIONS
8.
Following the manufacturers recommended torque sequence tighten the nuts to the following specifications
with ARP ULTRA-TORQUE FASTENER ASSEMBLY LUBRICANT.
Step 1. Tighten studs to 20 ft-lbs (27.1 Nm).
Step 2. Tighten studs to 40 ft-lbs (54.2 Nm).
Step 3. Final tighten studs to 55 ft-lbs (74.6 Nm).
Note: It will be necessary to re-torque the cylinder heads after the initial warm up and a complete cool down cycle.
Then re-torque the cylinder heads a second time after a month of steady use or 4 to 5 hot/cold cycles of the engine.
Bolt Torque Sequence
3/15/13
⚠ This is an automatically generated translation and unit conversion. Always refer to the original ARP instruction sheet for exact specifications. Errors may occur. 
