Crank Pulley Wobble??? Or A/C (Video Inside)

JDMMA70

Active Member
Dec 4, 2006
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Houston
Im going crazy because if i look at the pulley it looks like its moving ever so slightly in an up and down motion. Now it could very well be the rust on the pulley and as it spins gives it the illusion that its wobbling. What made me look at it was, after swapping transmission i heard this slight knocking noise. Now i know for sure its not rod knock before anyone suggests that. Ive been around rod knock quite a bit and know what that sounds like. This sound was defiantly coming from the front. Directly from the front. Now my drive belts are worn and cracking, i plan on replacing them this Friday, along with the timing belt. But today when i heard the slight knocking noise i popped the hood and started looking around. I thought maybe a pulley was wobbling and then i remembered reading on SupraMania about crank pulley wobble making a knocking noise. I dont think the camera caught what i saw but it might not be nothing either still worth a check. Better safe than sorry. However now im not too sure. I grabbed a video for you folks to look at to give me your opinion. The knocking sound was only after a drive, it gets a little more audible if i turn on the A/C.

Heres the video, i want to get to the root of this problem to make sure its nothing serious and doesnt cost me some serious repairs down the road.

http://smg.photobucket.com/albums/v436/Cobra281s/?action=view&current=MOV02047.mp4

Thanks for your help!
~JDMMA70