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jroymcd
Samba Member
Joined: April 18, 2005
Posts: 1053
Location: Bay Area
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 Posted: Thu Aug 09, 2007 1:00 pm Post subject: end play? |
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went to adjust my valves and there is like 1/4 inch or more play in the bottom pulley. the motor has less then 2000 miles on it. what went wrong?
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KTPhil 
Samba Member
Joined: April 06, 2006
Posts: 34022
Location: Conejo Valley, CA
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| Posted: Thu Aug 09, 2007 1:23 pm Post subject: |
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| You mean crank end play? At 1/4" something major is wrong, and you'd best pull the motor ans see if you have something like a looseflyweheel that is readying to let go and do more damage. |
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jroymcd
Samba Member
Joined: April 18, 2005
Posts: 1053
Location: Bay Area
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| Posted: Thu Aug 09, 2007 1:40 pm Post subject: |
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i can rotate the pulley side to side more than 1/4 inch before it catches.
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79SuperVert
Samba Member
Joined: May 31, 2002
Posts: 9758
Location: Elizabeth, NJ & La Isla Del Encanto
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| Posted: Thu Aug 09, 2007 1:43 pm Post subject: |
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| jroymcd wrote: |
| i can rotate the pulley side to side more than 1/4 inch before it catches. |
So you don't mean that you are trying to push and pull the pulley "in and out", but rather that you are turning the pulley in the direction of rotation and it takes a bit of turning before you feel resistance? That is normal. |
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keifernet
Samba Search & Rescue
Joined: May 11, 2002
Posts: 19395
Location: Samba Center for Behavioral Science
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| Posted: Thu Aug 09, 2007 1:47 pm Post subject: |
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| Or possibly the keyway in the crank and or the crank pulley is beat/worn? |
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The Noof
Samba Member
Joined: January 25, 2005
Posts: 4346
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| Posted: Thu Aug 09, 2007 1:51 pm Post subject: Re: end play? |
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| jroymcd wrote: |
| went to adjust my valves and there is like 1/4 inch or more play in the bottom pulley. the motor has less then 2000 miles on it. what went wrong? |
Are you adjusting the valves to resolve anoise issue, and then discovered this?If so, you discovered your noise.Keifernet may be right...pulley came loose, and it did in the keyway.Could be camshaft drive gear loose on the crank as well. |
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jroymcd
Samba Member
Joined: April 18, 2005
Posts: 1053
Location: Bay Area
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| Posted: Thu Aug 09, 2007 2:02 pm Post subject: Re: end play? |
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| The Noof wrote: |
Are you adjusting the valves to resolve a noise issue |
YES
Would it be safe to drive it for a few miles.
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The Noof
Samba Member
Joined: January 25, 2005
Posts: 4346
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| Posted: Thu Aug 09, 2007 2:31 pm Post subject: |
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| I wouldn't untill I knew for sure what it is, bro. |
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jroymcd
Samba Member
Joined: April 18, 2005
Posts: 1053
Location: Bay Area
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| Posted: Thu Aug 09, 2007 2:52 pm Post subject: |
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dowel pin that holds in the main bearing?
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SRP1
Samba Member
Joined: January 06, 2007
Posts: 4340
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| Posted: Fri Aug 10, 2007 12:32 am Post subject: |
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| Somthing is wrong with that! While it's very possible it is a loose pulley and wobbled out key way, what you may be seeing is actually an excessive amount of crankshaft endplay. Look carfully when you rock the crankshaft back and forth, the cam gears will normally push the crank front to back with a slight twisting motion in the crank. That will give you the impression that it's only the pulley moving side to side when in fact the crank is walking front to back. Hope this makes sense to you, let us know what you find. |
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