December 10, 2010

Volvo 6-cylinder VVT engine: Cam Settings

Here’s how our very sharp Forum Moderator JDS60R does the very important lining-everything-up work on a Volvo 6-cylinder VVT engine (S80 and some others). This is generally done during a timing belt change.

  1. Lock cams.
  2. Loosen outer pulley 3 bolts.
  3. Turn outer pulley clockwise to limit position while holding center.
  4. Lightly lock down 3 pulley bolts.
  5. Put center bolt in and lightly tighten.
  6. Turn outer pulley clockwise until it stops.
  7. Lightly loosen center bolt so it still has drag but you can turn inner.
  8. Turn outer pulley one turn (clockwise) until outer pulley mark is 1.5 teeth before mark.
  9. Tighten center bolt to spec without moving 1.5 tooth relationship of outer (just hold inner pulley while tightening -very easy).
  10. Install center plug with o ring -tighten to spec.
  11. Hold inner putting pressure clockwise so it does not move.
  12. Loosen 3 outer pulley bolts and align marks.
  13. Tighten 3 pulley bolts to spec.
  14. Unlock cams.
  15. Reassemble.
  16. Check timing marks through several hand revolutions of motor.
  17. Remember to go past marks 90 degrees and then back to them on all VVT motors ( once it has been pressurized/run)

S80 Timing Gear

Read more about this advice, and the original question, in the Volvo Forum: Confused on Setting the VVT in my ’99 T6

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5 responses to “Volvo 6-cylinder VVT engine: Cam Settings”

  1. Rowan says:

    I have tried to follow what you have said here for several efforts.
    The engine I am working with is a 2.9 – 2000 Volvo. It appears in the steps that the marks can not line up with the directions you have given. I am unsure of what to do – now.

  2. Matt says:

    Post your problem in the S80 forum. You’ll get more help there than here.

  3. steve says:

    i need pictures and step by step diagram. plaese of the volvo xc 90 t6 2003. i have removed the cam gears and cant fix it back please help

  4. GEORGE says:

    I replaced the head on an 2.9 volvo s80 and put it all back together and all it does is turns over but will not start.The engine is getting spark and fuel.Any suggestions on what I did wrong.

  5. manuel aguayo says:

    Hello. I have a problem with a volvo xc90 , the cam gears were removed from the cams, now I have to put it together, but I do not know the position of the cam and the cam gear, can you please help me with this situation ?

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