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ToyotaChevrolet & Ford Flywheel Bolt Installation Guide (7/16-Inch Diameter) — FW101
This guide covers installation of the XOTIC PERFORMANCE™ FW101 flywheel bolt kit for Chevrolet and Ford applications using 7/16" diameter flywheel bolts. Prefer a printable copy? Download the PDF manual.
Measure your bolts before ordering. This kit is specified by fastener diameter, not by vehicle: 7/16" only. Chevrolet and Ford both used other diameters across their V8 ranges, so check what came out of your crank flange rather than going by engine family.
Why flywheel bolts deserve attention
The flywheel bolts are the only thing holding a heavy spinning mass to the end of your crankshaft, and they see a load case most fasteners never do: constant torsional reversal. Every combustion event tries to accelerate the crank; the flywheel's inertia resists; the joint has to hold through both. Add clutch engagement shock on a manual car and the picture gets harsher again.
When a flywheel bolt loosens it does not fail quietly. The joint frets, the bolt holes elongate, and the crank flange — a part you cannot replace without pulling the engine — gets damaged. It's a low-cost, high-consequence fastener. XOTIC PERFORMANCE™ flywheel bolts are manufactured from our premium XOTIC 7200 steel alloy and backed by a lifetime warranty.
Before you start: verify first
Confirm that part number FW101 is compatible with your application before installing any components, and check that the bolt diameter matches what came out. Inspect all components for damage and report anything you find. Clean the crank flange and the flywheel's mating face before assembly.
How to install 7/16-inch flywheel bolts
- Inspect first. Before installing any components, check for product damage and report anything you find.
- Lubricate under the heads. Use the provided assembly lubricant under the head of each bolt. This reduces friction and allows for accurate torque readings.
- Fit the flywheel and hand-tighten. Place the flywheel onto the crankshaft and run all bolts in by hand before any torque goes on.
- Torque to 90 ft-lbs in a cross pattern. Work across the flywheel rather than around it, so pressure is distributed evenly as the joint pulls up.
Flywheel bolt torque spec
| Fastener | Torque | Pattern |
|---|---|---|
| 7/16" flywheel bolts | 90 ft-lbs | Cross pattern |
A common mistake to avoid: torquing around the circle instead of across it. Going bolt-to-adjacent-bolt pulls one side of the flywheel down before the other and can leave the assembly sitting slightly cocked on the flange — which shows up later as runout and vibration. Always work in a cross pattern.
Frequently asked questions
What is the torque spec for 7/16" flywheel bolts?
90 ft-lbs, applied in a cross pattern with assembly lubricant under each bolt head.
How do I know if my flywheel bolts are 7/16"?
Measure the shank of an original bolt with calipers, or check against a known 7/16" fastener. Diameter, not engine family, is what determines fitment here.
Why lubricate under the bolt head?
Because most of the torque you apply is consumed by friction, and a large share of that friction is at the bearing face under the head. Without lubricant, the wrench reaches 90 ft-lbs long before the bolt reaches the clamp load the spec assumes.
Can I reuse the factory bolts?
We wouldn't. Flywheel bolts cost very little relative to the crank flange they protect, and if the flywheel is already off, replacing them costs nothing but the parts.
Need help?
For technical support, email support@xotic-performance.com. All XOTIC PERFORMANCE™ fasteners are covered by our limited lifetime warranty. Finished your install? Tag #XOTICPERFORMANCE on Instagram for a chance to be featured.
© 2026 XOTIC PERFORMANCE™. This installation guide is an original copyrighted work of XOTIC PERFORMANCE™. Reproduction, distribution, or use of this content in whole or in part without written permission is prohibited. Doc ref: 2026.01.31 (web edition 2026.08).
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