THOROUGHBRED DIESEL FHSD1721 Fasteners Performance Head Stud Kit Instruction Manual
- June 3, 2024
- THOROUGHBRED DIESEL
Table of Contents
THOROUGHBRED DIESEL FHSD1721 Fasteners Performance Head Stud Kit
Instruction Manual
Parts Included:
(36) Head Studs
(36) Head Stud Nuts
(36) Head Stud Washers
(12) Head Bolts
(1) Assembly Lube
Tools Needed:
- Socket Set
- Torque Wrench
- Thread Chaser
Please Read Instructions before starting installation. If you don’t feel confident that you can complete this task, do not start it and seek professional help!
- These instructions only cover the installation and torque sequence/technique of the Head Stud Kit.
- Clean and inspect the Studs, Washers, and Nuts to ensure they are free of shipping damage and obvious defects.
- Clean all threads in the block. It is recommended to use a Thread Chaser on the threads of the block to ensure they are completely clean.
- Lubricate the threads of the Head Studs and install them into the block. Be sure to only screw them in HAND TIGHT. Look across the tops of the head studs to see that they all appear to be the same length. If one is taller, remove the stud, clean the threads in the block and reinstall.
- Install the head gaskets and cylinder heads; check for any misalignment.
- Place the Head Stud Washers onto the Head Studs and lubricate the top face of the Washer and the Stud threads with Assembly Lube.
- Lubricate the mating face and threads of the Head Stud Nuts with Assembly Lube and install them onto the Head Studs tightening them HAND TIGHT.
- Snug all Head Stud Nuts on the Head Studs, then follow the torque sequence below in a 3-step process for torquing the Head Stud Nuts.
1. The first round tighten nuts 1-18 – 25 ft lbs.
2. Then repeat the sequence 1-18 – 50 ft lbs.
3. Followed by 1-18 – 125 ft lbs.
- The amount of Head Stud threads showing above the Head Stud Nut should all be about the same. If one appears to have more thread, the stud is most likely not all the way in the head.
Lubricate the mating face (bottom of head) and threads of the Upper Row 8mm
Bolts with Assembly Lube and install them following the torque sequence below
in a 2-step process going from inward-out.
1. The first round tighten bolts 19-24 – 10 ft lbs.
2. Followed by 19-24 – 25 ft lbs.
Disclaimer and Liabilities
Seller disclaims any responsibility/ liability for improper, incorrect, or
inexperienced installation of products by the purchaser or installer resulting
in damage or loss. Buyer affirms by purchase of this product that it is fit
for intended use and accepts all liability. Buyer affirms products are used at
buyers own risk and accepts full responsibility.
Thoroughbred Diesel Fasteners Performance Head Stud Kit for 6.6L L5P Chevy/GMC Instructions • August,
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