Honda K Series Crank Pulley Key 90704-PNA-000

Genuine Honda Crank Pulley Key (90704-PNA-000) - K-Series, R18 & K20C

This is the woodruff key that indexes your crank pulley to the crankshaft. It's small, it costs almost nothing, and it's the difference between a pulley that stays where you put it and one that shifts under load. Anyone who's had a pulley spin on a crank knows what that costs, and this is the part that prevents it.

Replace It, Don't Reuse It

The practical advice on this page, and it's the whole reason to buy one.

The key sits in a slot machined into the crankshaft, taking shear load every time the engine fires. Over years it deforms slightly, and it's easy to nick or bend on removal since it's a small piece of steel being pried out of a tight slot.

A worn or damaged key means a pulley that doesn't seat exactly right, which allows movement under load. That movement leads to a wallowed keyway on the crankshaft itself, and repairing that is an engine-out job on a part you can't replace separately.

For the price of this key, there's no version of reusing the old one that makes sense.

Buy It With The Pulley

If you're replacing a crank pulley, add this to the order.

The two go together, the access is identical, and discovering your old key is chewed up with the pulley already off is a frustrating way to stop a job.

It's compatible with crank pulleys 13810-RRB-A01, 13810-RRA-A02, and 13810-R40-A01, which covers K20, K24, and K24Z applications.

Get The Torque Right

The key indexes the pulley, but it's the crank bolt that holds everything together.

Look up the torque spec for your engine and follow it, since crank bolts on these engines are torqued high for a reason. An undertorqued bolt lets the pulley move against the key, which puts you back where you started with a damaged keyway.

Clean the keyway and the key slot before assembly so nothing is holding the pulley off its seat.

Use The Genuine Part

The dimensions are the specification here. A key that's slightly undersized allows movement, and one that's oversized won't seat, and either outcome defeats the purpose.

Honda makes these to tight tolerances in hardened steel that resists the deformation the old one has already started showing. On a part this inexpensive protecting something this expensive, it's an easy call.

Fitment

2013-2021 Acura ILX
2007-2012 Acura RDX
2019-2021 Acura RDX
2002-2006 Acura RSX
2015-2021 Acura TLX
2004-2014 Acura TSX
2003-2017 Honda Accord (K-series)
2018-2022 Honda Accord 2.0T
2014-2021 Honda Accord Hybrid
2002-2005 Honda Civic Si
2006-2015 Honda Civic
2016-2021 Honda Civic LX and Sport
2017-2021 Honda Civic Type R
2002-2019 Honda CR-V
2020-2021 Honda CR-V Hybrid
2012-2015 Honda Crosstour
2003-2011 Honda Element
2016-2021 Honda HR-V

Part number 90704-PNA-000. Compatible with crank pulleys 13810-RRB-A01, 13810-RRA-A02, and 13810-R40-A01.

Who Should Grab One

This is for anyone replacing a crank pulley, doing timing work, or building an engine who'd rather put a fresh key in than trust one with two decades of shear cycles behind it. It's among the cheapest parts in the job and among the most consequential if it fails. Add it to the order and torque the bolt properly.

Fits: Honda and Acura K-series, K24Z, R18, and K20C, see the application list above. Part number: 90704-PNA-000. Type: genuine Honda crank pulley key (woodruff key). Works with: crank pulleys 13810-RRB-A01, 13810-RRA-A02, and 13810-R40-A01.