Rod knock? (video)

[dsmulla]

I am trying to figure out what is this noise that seems to be coming from the bottom end and is also evident on timing belt side. Now, there is no knock/noise during idle only when the motor is revved you hear it at the top of the rev.

Moreover, I had been battling overheating problems and changed the waterpump and that fixed that. This knock sort of sound was there before that as well. Could overheating have caused this knock noise? Also, the car vibrates a lot more escpecially when I give it some gas. My driver side motor mount is done and I think that could be it but the car vibrates very hard. My balance shafts have not been eliminated and could this sound having anything to do with them or the bearing?

Keep in my mind I can feel this knock is the gas pedal, throttle control from under the hood and the clutch. I don't think its crankwalk because I have inspected the crank by pulling on the crank pulley and there seems to be no movement.

All help is appreciated and just listen for the sound at top of the revs.

http://www.youtube.com/watch?v=6_yBmLuxy6o

Osman

 

[dsmulla]

Is the mechanic right about the spark plug theory? He is saying there still is compression in the cylinders even if there is no spark. I can still hear the knock even thought I tried the spark plug trick. Would that give me definet answer that it is not my rod bearings?

 

[fwdeclipse]

I would think it would still knock cause there is still compression in there and the piston is still moving even though you take the spark plug wire off. I would take the pan off and see if any of the rod caps are loose. You will find out in a hurry when you drop the oil and find a bunch of metal in there.

 

[Mr Peepers]

It is a good argument about compression, but it has worked before. It's just something easy to test. It's not 100% but sometimes you can find out which cylinder has the problem. Again, take the pan off....

 

[dsmulla]

Yeah I know............