V220 cdi wont start after headgasket replacement

Discussion in 'Engine' started by Airpowered, Jun 9, 2014.

  1. Airpowered

    Airpowered New Member

    Messages:
    5
    Joined:
    Jun 9, 2014
    Car:
    V220 cdi
    Hi all,
    1st post after lurking for a while and pinching loads of useful info.
    Just recently completed changing the head gasket on a v220 (don`t ask if i`d do it again), every thing went kinda ok, injector bolts sheared, heater plugs sheared (they needed doing and it seemed a good time), chain tensioner refused to budge at all...
    Any way got it all apart and gasket replaced, new bolts in all the recommended places, new o-rings on all the fuel lines, cams refitted engine rotated by hand to ensure no issues there.
    3 new injectors fitted and one refitted with new seals all round.
    fitted a hand priming pump (mistake it leaked air) and removed again.
    Now the fun part...
    engine turns over and fuel drawn from tank, until no bubbles visible in any fuel lines (not starting), tried a squirt of easy start after charging battery for the nth time, still not firing or starting...
    any ideas what i`ve missed and what should i be checking next

    I`ve a bluetooth odbII which shows no errors using "Torque" or "odb dr for mercedes"

    On a couple of the attempts made, cylinder 2 or 3 or 4 start chuffing (mist exhausted from inlet) but not at the same time (or in sequence should i say)?

    I`ve double checked the cam timing with the crank at OT and the exhaust cam is 1mm off the mark (chain stretch?).

    Open to any suggestions :wallbash:
     
  2. BlackC55

    BlackC55 Authorised Forum Sponsor Authorised Forum Sponsor

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    Did you put the fuel pipes to the pump the right way round?
     
  3. Wayne.clk

    Wayne.clk Hardcore MB Enthusiast

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    Clk
    Or maybe camshaft position sensor??
     
  4. OP
    OP
    Airpowered

    Airpowered New Member

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    Joined:
    Jun 9, 2014
    Car:
    V220 cdi
    which fuel pump, ,,,forget that worth checking both once i`ve some spare time, work getting in the way again...
     
  5. OP
    OP
    Airpowered

    Airpowered New Member

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    5
    Joined:
    Jun 9, 2014
    Car:
    V220 cdi
    How would i check that it is working ?
    I understand electrics just the specific test method eludes me
     
  6. Yamaman

    Yamaman Hardcore MB Enthusiast

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    May 6, 2013
    Car:
    2007 SLK280 auto/ w207 E-Class 350 CDI Coupe
    From what you said about the chuffing from the cylinders I'd check the valve timing first , sounds like it's not timed up correctly !..... Just a suggestion , hope you get it sorted mate !

    Mark
     
  7. Yamaman

    Yamaman Hardcore MB Enthusiast

    Messages:
    118
    Joined:
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    Car:
    2007 SLK280 auto/ w207 E-Class 350 CDI Coupe
    Just re-read you're post & seen that you've double checked the valve timing so can rule that out , valve clearances next perhaps ??

    Cheers

    Mark
     
  8. OP
    OP
    Airpowered

    Airpowered New Member

    Messages:
    5
    Joined:
    Jun 9, 2014
    Car:
    V220 cdi
    thanks for the suggestions, going to re check pipes and seals once shifts are over
     
  9. OP
    OP
    Airpowered

    Airpowered New Member

    Messages:
    5
    Joined:
    Jun 9, 2014
    Car:
    V220 cdi
    ah ha!

    Finally, all sorted,
    in order of events,
    gasket changed...won`t start
    new fuel pipe seals all round...won`t start
    egr cleaner in inlet to clear crap around valve seat (causing bad seal)..runs on easy start
    new injector fitted cyl 4..tries to run on after easy start but fails
    egr cleaner again..no change
    refit oil pipe to turbo DOH!!!
    check leak off pipes... 2+3 excessive flow
    fit 2 spare injectors...starts with easy start but diesel knock above idle
    fit 4th and final 2nd hand injector...Starts 1st time
    test run..radiator pressurising badly
    all apart again to tighten head bolts again
    test run..radiator still pressurising
    all apart again..checked ebay torque wrench setting at a friendly garage 10ft/lb under
    retightend head bolts again
    started and Radiator working lovely
    Injector leaking..tightened
    injector seal passing..retighten bolt

    Running and so far so good, thanks for all your assistance :bannana:
     

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