Jellomanpie Posted May 17, 2021 Share Posted May 17, 2021 Hi folks my son has 2007 Impreza EJ204. radiator burst and engine over-heated. radiator fixed but now have notice this engine knock which started a couple of weeks after over heating event. Have attached video for help from all you big brained Scooby mech heads please: cheers Mark Quote Link to comment Share on other sites More sharing options...
Siluro Posted May 17, 2021 Share Posted May 17, 2021 Maybe cam belt tensioner Quote Link to comment Share on other sites More sharing options...
Tidgy Posted May 18, 2021 Share Posted May 18, 2021 secondary air pump, black round thing? sounds too high pitched to be bottom end in the video Quote Link to comment Share on other sites More sharing options...
Jellomanpie Posted May 20, 2021 Author Share Posted May 20, 2021 Thanks guys. I thought cam belt tensioner but seemed toward back, but will look. I did a fault reader code check and it threw up P2441 (secondary air valve failed closed)......so you might have something there about secondary air pump. Will look into that. appreciated Quote Link to comment Share on other sites More sharing options...
Tidgy Posted May 21, 2021 Share Posted May 21, 2021 Ah, secondary air system is total garbage, takes water in and the valves in it eventualy rust and fail. Bad news is you cant just turn it off in the ecu, you need to get the valves removed so they dont jam in the wrong position. Quote Link to comment Share on other sites More sharing options...
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