I noticed last year that my crank pulley had a slight wobble to it and that my flex plate had a heavy wobble. So I got a new flex plate that will be going on shortly with the trans rebuild and I just put newish aluminum pullies on last weekend and noticed the wobble is still there? I've attached two videos, one is at idle the other is engine under load @ 2500rpm. Any thoughts on this? Is my balancer bad or could my crank be bent? The PO said the crank was polished when the engine was rebuilt, maybe it got dropped??
Are you sure the bolt is torqued? I had one loosen up and caused the crank to get scored and that's what mine looked like.pull the balancer off and dial indicate the crank to see if the snout is bent or out of round.
When I was changing the pulley I looked at the balancer and it looked to be in good shape. I will have to check to see if the balancer is torqued. Excuse my ignorance Dan but how do I go about dial indicating the crank snout??
x2 on torque.........you would need a magnetic base stand and dial indicator gauge.......both can be had a harbor freight for nor much money. pull balancer.......set the pointer arm against the crank snout, rotate crank........remove plugs to make this happen easier........watch gauge to see if it moves.......you wont be able to make a full 360 due to keyway. the snout could be bent but the center part not.........but I would try another dampner b4 jumping to crank. as far as flex plate, my new jw had almost .030 run out but my flange almost 0. called me, they said it's well within specs......???????? to me that mean my ta is moving that much in and out of my pump gears and everything else.........but when bolted to tq it didnt move that much.
Torque spec for the balancer bolt is 250 ft/lbs correct? Here's a video of my current flex plate that's coming off very soon. I'm almost certain this played a part in my trans leaking at the front main seal, along with what ever abuse it's endured by PO's having fun with it.
I agree 100% Jim. Can that transfer through the crank and "open up" the clearances of the bearings by chance? And also warp the crank to make the pulley wobble also?
X2 on Ben's post on how it indicate the crank snout.when you remove the balancer look close at the inside and the crank surface to see if there's evidence that metal transferred between the two. It'll be rough,kinda lumpy. You'll have to use some croakus cloth sand paper to clean it up to get a good clean surface to before you try to indicate it. I lost a block due to a wobbling balancer because it cracked the main webbing bad. Even with a girdle installed. Post some pics of the crank snout.
