wafflecopter

So back in january I got a knocking noise in my h23 vtec and parked the car. I decided to drain the oil and begin the diagnosis before it gets trailered to my shop. After draining the oil I didnt find a single flake of metal. I checked the vtec solenoid filter and no metal there either. Im gonna drop the pan after work today and see if its settled in the pan but if I find no metal there either is it still rod knock or is it wrist pin knock? Its knocking even at idle cold or warm so if it was a bad bearing you would think a ton of metal would be coming out. Thoughts?

wafflecopter

Anybody have any ideas?

holmesnmanny

compression test it

motoxxxman

metal flakes don't necessarily need to be ginormous chunks. they can be smaller than paint flake. when you drain the oil, shine a flashlight into the oil, or move it around in direct sunlight. if it looks like a heavy metalflake paint, that could be bearing material that slowly wore out.

the knocking could also be balance shafts, or piston slap

07whitendirty

Did you figure it out? Mine had a knock sound when revved up or on deceleration. It turned out to be a loose flywheel due to bolts backing out. In the process of a blue top swap now.