ok, i need a little help diagnosing my engine problem. This is going to be kind of long, so bear with me.

I have a h22a, that i thought i might has spun a bearing. It has a knocking sound that i notice when you accelerate between 2000-3000 rpm. It doesn't seem to do it all the time though. I tried the screw driver trick to see if i could tell where its coming from, but i couldn't. I don't know if its the head or the bottom end. It all seemed pretty loud with the screw driver.

I drained the oil to see if there where any metal flakes, but i didn't find anything. I even strained the oil out but nothing was found. I also have a magnetic drain plug and there was only a very very small amount of metal on it. After removing the oil pan i don't see anything that stands out as the problem. I have had spun a bearing on a h23 once and it seems like that made a much louder of a knocking then my engine now. If its just begun knocking, is there anyway to check for a warn bearing with out stripping the entire engine?

I also tried retarding the timing on the engine, but it doesn't seem to affect the knocking sound.

Does anyone have any suggestions? any special tricks i can do to see which, if any, of the bearings is going? Or what else i can check? thanks in advance

 

a rod bearing noise is slightly heared at ilde. but, if you rev up the more the bearing noise will get louder. Now if you want trace down which bearing is making the noise, if rod bearings are your problem, rev up the motor to 1500 - 2000 rpm - hold it steady and remove the a plug wire - if the noise reduced at cylinder where you switch pulled the plugs from - then that's the rod bearing that you want to inspect.

 

did you check the oil level first it could be jut low oil and low pressure

 

well, oil level was ok, so it must not be that. I tried removing plug wires but the noise did not seem to change as wires where removed. I did get shocked 2 times though. anyone else have any ideas?