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View Full Version : WTF is this noise? Rod? Belt? ect



turd
03-10-2012, 05:10 AM
My 2.8 has been making a somewhat knocking noise at the bottom of the motor on driver side? But can barely hear it on passenger side outside. I do have a hole in flex pipe, could that be it? It doesn't make the knock while driving, only at idle. Could it be a belt? Or what the hell?

bmx_a4
03-10-2012, 10:58 AM
Could just be that hole in your flex pipe. When it's making the noise do you feel any vibrations associated with it?

For instance, when I spun a rod bearing, I could feel it knocking whereas an exhaust leak that causes a ticking sound wouldn't have that effect

Crispy222
03-11-2012, 04:53 PM
What changed? What did you work on last on the engine?

Check the bolts on any pulleys. I had replaced my power steering pump with a used one. The bolts tightened up to the rusty spots and didn't compress the pulley to the flange. Almost wore through the bolt shanks before I found it. The sound changed with rpm.