Crankshaft Pulley Noise

[Steve Tinker]

Are those grooves on the bearing carrier caused by crankshaft end float?
If so, thats an awfull lot of movement - what happened to the thrust bearing, ground to dust I assume.....

[JFP in PA]

Originally Posted by Steve Tinker

Are those grooves on the bearing carrier caused by crankshaft end float?
If so, thats an awfull lot of movement - what happened to the thrust bearing, ground to dust I assume.....

That is a brand new thrust washer, the grooves are oil passages. From time to time, these things literally drop out of the slot they fit in, and fall into the sump. When that happens, the crank starts moving forward and back, which is not good. And there is no way to replace these things without pulling the engine apart........

[jcb986]

Had the same noise, sounds like squeal. Then it's your AOS going. What is happening is the AOS is sucking air around the front crankshaft seal. I also checked and tried to remove the oil filler cap when mine was squealing and could not. Replaced the AOS and end of problem. And the engine never blew smoke when it was failing.

[talvez]

thanks for all your replies you guys.

I have no CEL and I couldnt pick up anything unusual with durametric program.

With the AOS its not a constant sucking sound or squeel. I also changed the AOS about 12k ago and just changed the oil cap seal my last oil change about 300 miles ago. So i dont think its related to that.

Originally Posted by Jake Raby

Is it a squealing sound/ high pitched? Does it change in pitch and volume with throttle changes?

You are more than likely seeing a symptom of another issue that few people get to experience.

The pitch is high pitched and does change in volume with throttle changes. Maybe a little higher pitch on acceleration but may be due to the noise repeating more quickly. If I could describe the sound... its almost like a ball in the bearing has gotten loose and causing a speed wobble with a slight metalic sound to it. Tomorrow I will try and get a recording of the sound but it always hard to tell on the internet. Oh, and I feel very privileged to experience this problem hahaha :/

Are there any signs to point to a crankshaft thrust bearing failure? How can I test it? I wonder how much that would be to replace? :/

thanks