Bad Rattling Coming From Engine Area - Arctic Cat Prowler Forums: Prowler UTV Forum
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post #1 of 11 (permalink) Old 03-06-2012, 06:11 AM Thread Starter
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Bad Rattling Coming From Engine Area

I am having a problem with my 2008 Prowler XT650. At idle it has a terrible rattling/knocking noise coming from the engine area. Sounds like there is something knocking or banging, as well as something rattling. When the engine is revved up, even just a little, the noise goes almost completely away. I have removed the drive side cover and it doesn't seem to be the belt or clutches. Any ideas where to look?
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post #2 of 11 (permalink) Old 03-06-2012, 06:57 AM
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Check the head pipe to see if its loose

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post #3 of 11 (permalink) Old 03-07-2012, 04:42 AM
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Sound like this?

650 H1 Tranny noise - YouTube


I was told it was normal on mine

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post #4 of 11 (permalink) Old 03-09-2012, 12:25 PM
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mine rattles and its the heat shield on the exhaust check that out
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post #5 of 11 (permalink) Old 03-12-2012, 01:05 PM
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Don't take it for granted, might be something simple or it might be something serious. Hopefully it isn't the connecting rod bearing. Have you changed the oil recently? What condition was it in?

I have a skidoo which rattles badly on idle, a fairly common propblem for that particular model, the rattling comes from the primary clutch. Increase engine speed ever so slightly and the noise disappears.

I'd be most concerned with ruling out a serious engine issue. Crank replacement is not a fun job. The rod bearing isn't really serviceable.

Best of luck
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post #6 of 11 (permalink) Old 03-17-2012, 05:16 PM Thread Starter
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Thanks for the input. I had never had to work on the Prowler other than oil changes and valve adjustments. After I made the first post it got to the point where the primary on the CVT was always turning, and the noise would come, go, and change. At this point I knew the one-way bearing inside the inner clutch cover wasn't working properly because the idle was right but the primary was turning. I removed the primary and secondary clutches for the CVT and the clutch cover behind them. The thin retaining spring that goes around the one-way clutch was broken and twisted around in the bearing and inside the clutch bell for the centrifugal clutch. All other bearings, clutches, seals, etc in there look fine. I haven't replaced the bearing yet because it is currently on order. I'm hoping that cures my problems and I'll let you know what happens after I replace it.
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post #7 of 11 (permalink) Old 03-18-2012, 06:45 AM
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you can delete that bearing all together you will just not have engine braking and need to use your park brake but I really like the way the way my bike runs without it.
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post #8 of 11 (permalink) Old 03-22-2012, 06:00 AM Thread Starter
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Well, the one-way bearing was definitely bad, but it did not entirely cure my problem. However, I have identified the culprit. The bearing that goes in the clutch cover and supports the clutch housing has just enough play in it to allow the clutch housing to shift and put excess pressure on thae one-way bearing, creating noise. If I have the CVT cover off, as well as the drive and driven clutches, the shaft for the drive clutch no longer turns (because I replaced a shot one-way bearing), but there is a slight rubbing/grinding noise that goes away when i rev the engine up a little. If I pull up on the shaft that the drive clutch goes on, the noise goes away. Upon further investigation I noticed a slight bit of play in the clutch housing that goes through the bearing in the clutch cover. I pressed the housing out and removed the bearing for inspection and there is just enough play in the bearing to cause the problem I am having. I have no doubt that replacing the bearing will solve my problem. I'll get it ordered today.
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post #9 of 11 (permalink) Old 09-30-2014, 07:21 PM
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Is it OK for the engine and tranny to delete the one way bearing ?? I just got done replacing the seals on my 08 xtx 700 and put everything back together added oil and started her up . And there was a clanking noise coming from clutch area that I've never herd before .. not a constant noise just hear and there. It didn't sound goo at all !! I've done the seals before so I know I have everything on right just can't figure out what the problem is now!!!
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post #10 of 11 (permalink) Old 10-01-2014, 05:21 AM
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Quote:
Originally Posted by Woodman View Post
Is it OK for the engine and tranny to delete the one way bearing ?? I just got done replacing the seals on my 08 xtx 700 and put everything back together added oil and started her up . And there was a clanking noise coming from clutch area that I've never herd before .. not a constant noise just hear and there. It didn't sound goo at all !! I've done the seals before so I know I have everything on right just can't figure out what the problem is now!!!
It is okay to run without the one-way bearing installed. You just won't have engine braking.

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