1999 Volvo S70 Logo
Posted on Apr 10, 2009
Answered by a Fixya Expert

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I changed the timing belt on a 98 volvo s70 turbo and after lining up the timing marks theres no compression in the cylinders. Any help would be greatly appreciated.

  • 4 more comments 
  • mits420a Apr 10, 2009

    the timing belt did not break it was just 20,000 miles over due. i lined up the timing marks to the cut outs on the timing cover and it sounds like it wants to turn over but it just doesnt and ive tried rotating the crank 180 degrees but still nothing

  • mits420a Apr 10, 2009

    by 180 do you mean one full revolution of the crank so the mark lines up again cause that would actually be 360 or should i try an actual 180 degree

  • mits420a Apr 10, 2009

    if i only rotate 180 degrees than cylinder one wil no longer be at TDC.

  • mits420a Apr 11, 2009

    ok so i figured out i had the wrong belt but now i have a little black plug thats supposed to go in the back of the cylinder head but i cant figure out where part number9135635

  • Marvin
    Marvin May 11, 2010

    180

  • Marvin
    Marvin May 11, 2010

    This is an interference engine, if your belt broke you have bent valves, the cylinder head must come off for repair, info source: Gates Timing Belt Catalog..

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  • Posted on Apr 10, 2009
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You could be 180 degrees out of synch the crank pully goes around twice when the Cam shaft pully goes once.

  • 3 more comments 
  • Anonymous Apr 10, 2009

    Did you take the belt off then rotate the crank one rotation (180) line up your timing marks, then put the belt back on. then you should be good to go

  • Anonymous Apr 11, 2009

    oops you need t go 360 Degs

  • Charles Fitzgerald Jul 31, 2017

    Are you saying that if I take the belt off and rotate the crank one complete revolution I should have compression????

  • Charles Fitzgerald Jul 31, 2017

    Volvo S 80 T6 2001 timing belt tensioner broke while driving

  • Charles Fitzgerald Jul 31, 2017

    Timing marks set but no compression in none of the cylinders. Could all of the valves be bent????

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Why does my car have no compression all cylinders?

Sounds like either something has completely obstructed the air flowing into the engine which is unlikely or your Timing belt skipped and bent all the Valves on one Camshaft or both. Pull the Timing Covers off and see if the timing marks line up when on #1 Cylinder is on Top Dead Center. If they are not on a 98 and older you will have bent Valves. On the 99 and newer the exhaust cam has a Variable Timing hub and the cam could have turned leaving the timing marks in place and bending the exhaust Valves. Sorry for the bad news.
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