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ToyotaHonda & Acura Connecting Rod Bolt Installation Guide (1.2–2.0L 4-Cylinder) — CP988
This guide covers installation of the XOTIC PERFORMANCE™ CP988 connecting rod bolts for 1.2–2.0L Honda and Acura four-cylinder engines. Prefer a printable copy? Download the PDF manual.
26 ft-lbs is the whole spec — and it is easy to overshoot. These are small fasteners with a short final torque, and a 1/2" drive wrench sized for a diesel is nowhere near accurate at this end of its range. Use a properly calibrated 3/8" wrench, and record the free length of every bolt before it goes in so you have a baseline for the 0.001" stretch limit later.
Why rod bolts matter more than any other fastener in the engine
Every other fastener in an engine sees load in one direction. A rod bolt sees it in both, thousands of times a minute. At the top of the exhaust stroke the piston and rod are decelerating hard and trying to pull the cap off the rod; a fraction of a revolution later, combustion slams the assembly the other way. That reversal is why rod bolts are the highest-cycle, highest-consequence fastener in the engine.
On a Honda four, the load that matters most is inertial rather than combustion-driven. These engines rev — a B-series or K-series build spending real time above 8,000 rpm is loading its rod bolts on the exhaust stroke far harder than a torque-focused engine ever does, and rpm is the term that scales fastest. That's why a rod bolt upgrade is standard practice on a high-revving Honda build even before boost enters the conversation. XOTIC PERFORMANCE™ rod bolts are manufactured from our premium XOTIC 7200 steel alloy — substantially higher tensile strength than the factory hardware — and backed by a lifetime warranty.
What's in the CP988 kit
- 8 × connecting rod bolts (XOTIC 7200 alloy)
- 8 × nuts
- 1 × socket
- 1 × fastener assembly lubricant
Before you start: verify first
Confirm that part number CP988 is compatible with your application before installing any components. Inspect the connecting rods, caps and bearings for cracks, wear or damage, and replace anything questionable rather than reassembling around it.
How to install connecting rod bolts on a Honda or Acura four-cylinder
- Clean everything. Clean all bolts, threads and mating surfaces thoroughly to remove dirt, debris and oil. Inspect connecting rods, caps and bearings for cracks, wear or damage.
- Lubricate with the supplied lubricant only. Use only the fastener lubricant provided, applied evenly to the threads and under the bolt head, for consistent clamping force.
- Assemble the rotating assembly. Install bearings and pistons per the manufacturer's specifications, seat the rods on the crankshaft, and refit each cap in its original orientation.
- Hand-thread each bolt. Run each bolt in until snug, verifying alignment and seating before any torque goes on.
- Torque in two stages. Snug all bolts to 10 ft-lbs first, then bring them to a final 26 ft-lbs.
- Re-check and record. Verify uniform torque and document the original bolt free length for future comparison.
- At the next teardown, measure. Compare each bolt against its recorded length. Replace any bolt stretched more than 0.001" or showing galling or damage.
Honda / Acura connecting rod bolt torque specs
| Stage | Torque |
|---|---|
| 1 (snug) | 10 ft-lbs |
| 2 (final) | 26 ft-lbs |
A common mistake to avoid: substituting your own lubricant. Torque is a proxy for preload, and the relationship between them depends entirely on friction. Motor oil under the head of a rod bolt can leave you well short of the clamp load the spec assumes — on the one fastener in the engine that has no margin for it. Use the supplied lubricant, on the threads and under the head.
Frequently asked questions
What is the rod bolt torque spec for a Honda four-cylinder?
Snug all bolts to 10 ft-lbs, then final-torque to 26 ft-lbs using the supplied fastener lubricant.
Can rod bolts be reused?
Only if you measured them going in. Compare each bolt to its recorded free length at teardown — anything that has grown more than 0.001", or shows galling or thread damage, gets replaced.
Do I need rod bolts if I'm not running boost?
On a high-revving naturally aspirated build, yes — arguably more than on a mild turbo setup. Rod bolt load from piston inertia scales with the square of engine speed, so raising the rev limit puts more strain on them than adding a few pounds of boost does.
Do the caps have to go back on the same rods?
Yes, and in the same orientation. Rod caps are machined in place with their rods; swapping or flipping one leaves the big-end bore out of round.
Building the whole engine?
See our Honda K20 head stud guide (CP112).
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: 2025.08.14 (web edition 2026.08).
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