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2017 polaris sportsman 450 cam chain tensioner seeping oil?

huanchaco

By huanchaco
in Polaris ATV Forum

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huanchaco Apprentice

huanchaco

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My polaris 450 starts making cam chain noise as soon as the engine warms up. The tensioner,besides not having a ratchet mechanism to keep the chain tight,relies

solely on a spring and oil pressure. I am suspecting there might be an oil pressure drop seeping through the thread of the tensioner itself,which is a rough m18 x 1.5 mm that leaves a lot of

leaking space for the oil to escape. It would be interesting to machine a groove just before the thread starts to fit an o ring and keep oil pressure constant.

A manual adjuster will be my 2nd option but having no parts available here in Peru i'll have to modify the stock tensioner and tap some inner thread in it.

You have to be carefull with a manual since a chain can have it's slacks going around and end up too tight at some sectors.

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