Alshine Posted September 19, 2021 Report Share Posted September 19, 2021 Hi my 2011 Evo 4t recently started overheating upon checking various things I found the water pump impeller was missing. There has been various posts about this eg excess heat has melted them. On mine there is no trace of any bits so I can only assume it was never there. Past posts never came up with a definite answer but hopefully others have has this problem and got to the bottom of it. Any views on this mystery. One other question Is the camchain automatically tensioned or is there a way of doing it manually. Many thanks in advance for any replies. 1 Quote Link to comment Share on other sites More sharing options...
mcman56 Posted September 20, 2021 Report Share Posted September 20, 2021 The cam chain has an automatic tensioner. 1 Quote Link to comment Share on other sites More sharing options...
stu109 Posted September 20, 2021 Report Share Posted September 20, 2021 it seems unlikely that the bike could have operated successfully since 2011 without a functioning water pump. Like you, I have heard rumours of impellers melting. The cam chain runs in plastic guides so it is worth checking these are OK if it has been running hot. The tensioner has a spring mechanism. The manual will tell you how to check and reset. Quote Link to comment Share on other sites More sharing options...
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