pug Posted September 24, 2012 Share Posted September 24, 2012 I got motor rebuilt twice within a year what a nightmare. Has being running great since march. Changed oil last weekend same oil same oil filter (not a fram) now have a knocking sound from top of motor. Idels smooth runs great even getting better gas milage don't know why its a 2.5 ax5. any ideas. thanks Link to comment Share on other sites More sharing options...
Comanche County Posted September 25, 2012 Share Posted September 25, 2012 If you're not familiar with the various tapping and knocking sounds, go get a stethoscope from any autoparts store. Listen close and try to isolate where the noise is coming from. If its on the top like you think and is more of a tapping sound, it could be as simple as taking the valve cover off and torquing the rocker arms to spec. Worse case, could be a bent valve or broken pushrod...hard to diagnose without hearing it. But a broken valve or pushrod will effect the idle. I'm thinking its just a rocker arm. Link to comment Share on other sites More sharing options...
pug Posted September 25, 2012 Author Share Posted September 25, 2012 Would changing the oil do that much damage motor only has 7000 miles on it Link to comment Share on other sites More sharing options...
Comanche County Posted September 25, 2012 Share Posted September 25, 2012 Really can't diagnose it without hearing it. Take it back to the shop that did the rebuild for you and tell them to diagnose and fix it and be very upfront about it, they should warrantee their work. Link to comment Share on other sites More sharing options...
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