Thread: Strange Knock Noise?

Can somebody tell me what that noise is? If you can hear it, it sounds sort of like a knock. My knock sensor is throwing a code so I'm thinking it's that, but I'm not sure.

That's not so strange, it's an SR(or any other motor with old ass HLAs). Sounds like a collapsed Hydraulic lash adjuster. Sometimes they do go bad, but they usually will tap for a second at start up until oil pressure builds up. This is what I believe it is, but you'll need to confirm by removing the valve cover. After you remove it check to see if you have any loose rocker arms.

I had a feeling it was a rocker tapping. But if it's the HLA, then that's an easy fix. It wont affect the engine or anything right? I'm planning to do some general maintenance in a few weeks, but until then I'll be driving it.

just pop off te valve cover and check for loose rockers...

Your car speakers in the background?

If that's what it is, then it is easy to repair. You just need to look to see. I wouldn't keep on driving around like that. You could, like others most likely have, until it throws a rocker. It may just fall out of place, or get all chewed up, and possibly ruin your cam, etc. I don't like chancing stuff like that myself.

sounds like rod knock to me....................

i would take the valve cover off first and start there.