Honda K20C/K24W Upper Timing Chain Guide 14540-5A2-A01

Genuine Honda Upper Timing Chain Guide (14540-5A2-A01) - K20C & K24W

Of the three main pieces in your timing system, the guide is the one people skip. Plenty of engines get a new chain and tensioner while the original guide goes back in, and that's a mistake, because the guide is the part actually designed to wear. It has a plastic face that the chain rides against constantly, and that face erodes, grooves, and eventually cracks. This is the genuine Honda replacement for the K20C and K24W.

The Guide Is A Wear Part

Worth understanding, because it explains why this matters more than its price suggests.

Your chain doesn't run through open air. It rides against guides that keep it on its intended path and stop it whipping around. Those guides have a plastic or composite wear face, and it's sacrificial by design, meant to wear rather than let the chain contact metal.

Over enough miles that face develops a groove where the chain has been riding. Eventually the material gets thin enough to crack or break away. When it does, two things happen: the chain gets slack it shouldn't have, and pieces of broken guide end up circulating through your oil.

Neither is good. The slack is what causes rattle and eventually lets a chain jump. The debris ends up wherever your oil goes.

What A Failing Guide Sounds Like

The symptoms overlap with a tired tensioner, which is why the two get diagnosed together.

Rattle from the front of the engine, most obvious on a cold start and often quieting as oil pressure builds. Noise that changes with rpm as the chain slaps a worn or broken guide. And in worse cases, cam or crank correlation codes once enough slack has developed for timing to actually drift.

If you're chasing a timing rattle, pull the cover and look at the guide wear face directly. A deep groove or any cracking tells you plainly what you're dealing with.

Do The Whole Timing System At Once

This is the argument that matters. Reaching the guide means the front of the engine comes apart, which is nearly all the labor on the job. The parts are the cheap half by a wide margin.

So replace the chain and the tensioner at the same time, and inspect any other guides while you have access. These components wear as a system, they've all seen the same miles, and coming back for one of them in a year means repeating the entire teardown.

Skipping the guide to save a few dollars is the version of this mistake we see most often, and it's how people end up with a rattle that never fully went away after a chain job.

Use The Genuine Part

The wear face material and the guide's exact shape are what determine how the chain sits and how long the part lasts. Aftermarket guides vary considerably in both, and a guide that wears fast or sits slightly wrong puts you right back where you started.

This is the exact part Honda spec'd, 14540-5A2-A01. Given the access required and the debris a failing guide sends through your engine, the factory piece is the only sensible call.

Fitment

2024-2026 Acura Integra Type S
2019-2025 Acura RDX
2015-2025 Acura TLX
2016-2022 Acura ILX
2013-2017 Honda Accord (K24)
2018-2022 Honda Accord 2.0T
2016-2021 Honda Civic LX / Sport (2.0 NA)
2017-2021 Honda Civic Type R (FK8)
2023-2026 Honda Civic Type R (FL5)
2023-2026 Honda HR-V

Covers the K20C1, K20C2, K20C4, K20C6, K20C8, K24W1, and K24W7. Given how many engines this spans, confirm against your parts diagram before ordering.

Who Should Grab One

This is for anyone doing timing work who wants to do it properly rather than partially, and for anyone who's pulled the front cover and found a grooved or cracked guide. It's the cheapest part in the timing system and the one most likely to be the actual cause of your noise. If the chain and tensioner are going in, this goes in with them.

Fits: Honda K20C1, K20C2, K20C4, K20C6, K20C8, K24W1, and K24W7, see the application list above. Part number: 14540-5A2-A01. Type: genuine Honda upper timing chain guide. Recommended: replace alongside the timing chain and tensioner.