atruepretense
10+ Year Contributor
- 166
- 1
- Jul 15, 2009
-
Bethlehem,
Pennsylvania
That's not rod knock. Sounds to me like you left somthing or dropped somthing in one of the cylinders when the head was off. When you rev it up the noise changes and flutters abit depending on where the piece is or how it happend to get "squished" that particular time. I would pull all your plugs and look down into the cylinders with a scope, (you should see some shiney spots on the piston) if this is the case.
I've seen this at my shop a few times and pulled many heads to remove peoples fu&k ups. In one case i even found a wing nut off the air cleaner smashing around a cylinder but being to big to pass the exhaust valve.
That's just my 2 cents worth, since i'm certain it's not rod knock and doesn't sound like a lifter.
See, I thought that too. I took off the valve cover and looked EVERYWHERE for a loose rocker or bolt or something, I even shined a light into the cylinder and looked around for something but saw nothing. I was meaning to go to the auto parts store and get one of those magnetic extend pen things that would fit down into the cylinder. They have one at my auto parts store that is on a bendable stick so that would be awesome to find anything. I'll have to get that too. If it ends up being that, i'm gonna smack myself with a brick for being so stupid .
Yep, valve cover, head, oil pan and block, work top to bottom it should help you pinpoint the area, done it before tons of times when I was working as a tech.
Okay will do along with my now long list of things to check