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2005 Durango 3.7L Ticking Noise

3.7L V6 in a 2005 Durango. Auto tranny, 2WD. Took it to a mechanic that says he replaced all the lifters on it on both sides. Still ticks. Only code it throws is P0420. replaced the timing chaing tension piston on the driver side thinking it was the chain slapping around, nope, still ticking!! Can someone point me in another direction or should I start back with the lifters again as to say he "didn't" do them? if so, what are lifters on a motor with cams over the rockers? i know lifters on old school motors, but not these new ones! please help asap, have a long family trip coming up for a HUGE family reunion and need a truck to get me there. Also, if it helps: it ticks all the time, there is a point at about 1200rpms where it shuts up, but ticks again either above or below that point. and i have serious lack of power and serious loss of fuel efficiency... please help!

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See if the cam or rocker arms are worn. New lifters and other worn parts won't work. Also make sure you have good oil pressure and the oil is getting to the top of the engine.

Posted on May 22, 2009


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