Question about 2004 Nissan Sentra

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No compression! I drove my 1996 sentra home, and it ran fine! I got up the next morning, and it would'nt start!? It sounds like the motor is just spinning real fast!! I had a person check it; and he says the valves are bent! It jumped time!; and there is no compression!! Can this happen???

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  • td954 Jan 15, 2009

    I was told my engine has a timing chain?

  • td954 Jan 16, 2009

    I called nissan, and they said all 96 sentras had a GA16 Timing Chain engine! How can it be a belt or a chain?



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Probably need to check if this is a "zero tolerance engine if it is and slipped a chain or belt chances are you have bent valves if is not "zero" tolerance and has room between piston and valves you have probably lost timing belt, or chain but have not damaged pistons, or valves check belt or chain.

Posted on Feb 17, 2009

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This could have happened if the timing belt broke. You are supposed to change the timing belt every 60 to 90 thousand miles.

Posted on Jan 15, 2009

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  • Josh Crager
    Josh Crager Jan 15, 2009

    yes, it could be a chain as well. I have also seen instances where the timing chain / belt tensioner failed, and with the extra slack , it will let the cams jump a tooth or so, sometimes causing poor performance, sometimes bending valves.

  • Josh Crager
    Josh Crager Jan 15, 2009

    I do not understand What about my Information was not appropriate! I am an ASE cert mechanic, and my information is correct.

  • Josh Crager
    Josh Crager Jan 16, 2009

    ALL engines either use a BELT or a CHAIN -

    My toyota 4 cylinder 22R uses a chain, while my 3VZE v-6 uses a belt. My Mercedes M111 uses a Chain.- My 57 chevy 350 uses a Chain- My lexus 3UZFE uses a Belt..

    I was simply trying to get you to recognize that the person that gave you the original diagnosis that your "TIMING DEVICE" may have broken, be it a chain OR belt, had a firm basis for that diagnosis!

    Chain or Belt - I have seen both break, and I have seen both Jump timing. I cannot remember every engine in the world to the point of knowing if they use a chain OR a belt.

    Why would I have bothered to TRY to help you if I had no idea what I was talking about?



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