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Vibration damper/key questions #846489 11/05/10 01:09 PM 11/05/10 01:09 PM
Joined: Nov 2007 Posts: 21,823 Kirkland, Washington Pacnorthcuda OP Too Many Posts
Pacnorthcuda OP Too Many Posts Joined: Nov 2007 Posts: 21,823 Kirkland, Washington	Removed my damper from my 440 yesterday. It was loose on the crank yet the bolt was tight!!! By "loose" I mean I could rotate the damper on the crank slightly--about 1/8" of rotation at the damper edge. This means I have two issues. The keyway in the damper is wallowed out slightly, (a little wear there translates into a lot of movement at the outer edge) I expect to either replace the damper, or weld and dress the keyway and reuse. But---It also means the damper bolt is seating/tightening onto the crank snout instead of the damper. Yes the thick washer is in place. Is that normal???????? I think it should seat on the damper with the crank snout slightly recessed. Any feedback is appreciated!

Re: Vibration damper/key questions [Re: Pacnorthcuda] #846490 11/05/10 02:29 PM 11/05/10 02:29 PM
Joined: Jan 2003 Posts: 75,008 U.S.S.A. JohnRR I Win
JohnRR I Win Joined: Jan 2003 Posts: 75,008 U.S.S.A.	Something is not right , the dampner is a PRESS FIT on the end of the crank, if you can move it back and forth by hand something is wrong. It's one of 3 things , either the hub of the dampner is oversized on it's ID, the hub is cracked(I had one like this and it did the same thing as yours) , or the end of the crank is undersized.

Re: Vibration damper/key questions [Re: JohnRR] #846491 11/05/10 02:39 PM 11/05/10 02:39 PM
Joined: Aug 2005 Posts: 11,543 chicagoland,usa B buildanother I Live Here
buildanother I Live Here B Joined: Aug 2005 Posts: 11,543 chicagoland,usa	And the crank timing sproket floats unless the balancer cranks tight against it. So if the balancer was moving around, so was the sproket. Hope the crank is still good for your sake.

Re: Vibration damper/key questions [Re: buildanother] #846492 11/05/10 02:47 PM 11/05/10 02:47 PM
Joined: Nov 2007 Posts: 21,823 Kirkland, Washington Pacnorthcuda OP Too Many Posts
Pacnorthcuda OP Too Many Posts Joined: Nov 2007 Posts: 21,823 Kirkland, Washington	Quote: And the crank timing sproket floats unless the balancer cranks tight against it. So if the balancer was moving around, so was the sproket. Hope the crank is still good for your sake. Thanks guys, Yes I agree that the timing sprocket would 'float' along with the damper in this case that I described, but please clarify--the damper hub SHOULD press tightly (from the crank bolt/washer) against the timing sprocket correct? I did have to use a puller to slide the damper off, so I am thinking (hoping) the root-cause is the main bolt contacting the crank snout before seating against the damper. I will check the length of the bolt itself to make sure its not too long.

Re: Vibration damper/key questions [Re: Pacnorthcuda] #846493 11/05/10 02:50 PM 11/05/10 02:50 PM
Joined: Jan 2003 Posts: 75,008 U.S.S.A. JohnRR I Win
JohnRR I Win Joined: Jan 2003 Posts: 75,008 U.S.S.A.	Quote: Quote: And the crank timing sproket floats unless the balancer cranks tight against it. So if the balancer was moving around, so was the sproket. Hope the crank is still good for your sake. Thanks guys, Yes I agree that the timing sprocket would 'float' along with the damper in this case that I described, but please clarify--the damper hub SHOULD press tightly (from the crank bolt/washer) against the timing sprocket correct? I did have to use a puller to slide the damper off, so I am thinking (hoping) the root-cause is the main bolt contacting the crank snout before seating against the damper. I will check the length of the bolt itself to make sure its not too long. No , the dampner should not move at all once it pressed on, I don't think there is much more than .020-.030 of hub past the end of the crank. The bolt holds it tight against the crank sprocket, not from rotating.

Re: Vibration damper/key questions [Re: JohnRR] #846494 11/06/10 11:10 AM 11/06/10 11:10 AM
Joined: Dec 2007 Posts: 12,587 Great Neck,LI,new york hemi-itis I Live Here
hemi-itis I Live Here Joined: Dec 2007 Posts: 12,587 Great Neck,LI,new york	You will also need to check the nose of the crank for galling.If the dampner was moving there is a good chance of metal transfer HEMI-ITIS has no cure. My condition is fully BLOWN!!

Re: Vibration damper/key questions [Re: Pacnorthcuda] #846495 11/06/10 11:27 AM 11/06/10 11:27 AM
Joined: Feb 2005 Posts: 28,312 Cincinnati, Ohio Challenger 1 Too Many Posts
Challenger 1 Too Many Posts Joined: Feb 2005 Posts: 28,312 Cincinnati, Ohio	Maybe the hub of the damper is tight on the crank and the outer part of the damper is loose from the hub? Since you said you still had to use a puller to get it off?

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