Part two of our Polaris top end rebuild series. In this video John shows you how to remove the cylinder head from the engine and how to remove and inspect exhaust and intake valve stems and seats. We’re working with a Polaris Sportsman 850 ATV. Look below to jump to a specific part of the process, or check out the original manufacturer cylinder head diagram.
Polaris Sportsman cylinder head diagram: www.partzilla....
Ready to skip to the next step? Check out part 3: • Polaris Top End Rebuil...
Read how to do this job step by step: www.partzilla....
VIDEO HIGHLIGHTS:
Tools needed - 0:45
Remove valve cover - 1:43
Bring camshaft to top dead center - 2:53
Loosen up tension on sprocket and chain - 3:21
Remove box bolts - 4:08
Remove cam shaft bolt and remove chain - 4:45
Remove head & disconnect hose that goes to thermostat - 5:20
Remove head bolts in this order - 5:31
Cylinder head inspection - 7:10
Remove exhaust and intake valves stems - 7:58
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In the video we’re working with a 2011 Polaris Sportsman 850, but you may have similar steps for your Polaris ATV. If you’re not sure whether these steps apply to your machine, leave a comment and we’ll get back to you.
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