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Cam Lobe and Rocker Arm Wear

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Old 04-28-2016, 10:50 AM
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Default Cam Lobe and Rocker Arm Wear

I have been experiencing symptoms that appear to be similar to those of worn cam lobes and rocker arms. They appear to have uneven wear but I wanted to confirm with those that have more experience recognizing what that looks like. Please take a look at the attached pictures.










 
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Old 04-28-2016, 11:16 AM
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Could be from excess heat,wrong oil used(usually these two go hand and hand) or a stopped/restricted oil galley,or could even be soft heat treatment related,same as what many early Polaris cams went through.
 
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Old 04-28-2016, 12:21 PM
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Thanks OPT! Based on your experience does the cam and rocker show the kind of wear that would warrant replacement?

I got the ATV four months ago and it had a lot of water in the oil. Below is a pic of the first oil change. After five oil changes I think I finally have eliminated the water...
 
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Old 04-28-2016, 05:58 PM
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Oil looks like a caramel glaze for dipping apples.. Yep water could have a lot to do with oil thinning and cam wear. Plus I'd kinda be worried about the piston and rings also.. My two cents is I'd be saving up for a rebuild in the future if it still runs good enough for now.
 
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Old 04-28-2016, 09:31 PM
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OPT, thank you for the help! I recently put in a new piston, rings, and valves so I hope after the new cam and rocker arms it will be running like new.
 
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