Have more of a rattle than a growl from your engine lately?
If your old Honda’s motor is starting to sound like a diesel you may be in need of a valve clearance adjustment. Follow the steps in this vid to remedy the situation. A valve adjustment is a somewhat complicated procedure but as long as you focus on the right details, and check your work it should be no problem at all.
Valve adjustments can be done the same way on almost any older 4 cylinder engines, but you will need information specific to your car:
The valve clearance tolerances.
The firing order of your engine.
The direction of rotation of your engine.
What markings are on the crankshaft or camshaft pulley and what they represent.
I’ve also included the instructions from the service manual below so you can print them out for your own use.
This must be done when the engine is cold or it will throw off your measurements.
Letting the car cool for 4-6 hours should be sufficient but to be sure it’s best to just let the car sit overnight.
When setting clearances: If in doubt, Looser is better!
The accuracy of setting something by feel obviously depends a lot on the person doing the job, and if you’ve never done it before this part can prove to be a little nerve-wracking. If you’re unsure whether you’ve obtained the proper clearance for a valve, the main thing to keep in mind is that looser is better. Loose = Noise, Tight = Damage.
Once you’ve made your adjustments you should hopefully hear the difference right away, and in some cases you may even feel a miniscule improvement in power.
Keep em rollin folks!
Ethan – Editor