Question about 1999 Chevrolet S-10 Pickup

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1999 chevy s 10 doesnt have compression

I checked the timing chain, its good. Piston goes up and down but no compression. Not enough play in the timing chain to jump. Any ideas?

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  • John Savela
    John Savela Mar 13, 2009

    didnt check all cylinders but it turns over like the head is off of it.

  • John Savela
    John Savela Mar 13, 2009

    I have 1 plug out, no comp in that cyl. Its acting like the cam isnt turning. Ill check comp in all cyl and get back to you but it sounds and acts like there is no comp at all in any cyl. Ill get back to you thanks

  • Roberta Smith
    Roberta Smith May 11, 2010

    if you have all the spark plugs out it will... check the compression in each cyclinder with all the spark plugs out.... and let us know what it is

  • Roberta Smith
    Roberta Smith May 11, 2010

    no compression in ALL the cylinders ? how many miles on the motor ?


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If you can see the camshaft.... confirm it is turning... it may have broken.... that did happen to me once. i was able to confim that by removing the cap where i added oil and watching the cam when it was being started

Posted on Mar 13, 2009

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You could have a burnt valve if there is no compression in just one cylinder. It could be a broken valve spring. It could be a hole in the piston. If you have no compression in all the cylinders then most likely it's cam timing.(chain jumped).

Posted on Mar 13, 2009

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