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[Astra Mk4/G] [98-04] crank pulley nut undoing direction ?

Discussion in 'Astra, Corsa, Zafira, Meriva, Adam, Agila, Tigra & Nova [Includes AstraVan & ComboVan] owners forum' started by allan1972, Mar 26, 2010.

  1. allan1972

    allan1972 New Member

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    hi all

    please advise me, so i dont get this wrong. i need to no the crank pulley nut/bolt undoing direction on this pick, red or blue direction ?
    [​IMG]


    on my 1.6 16v petrol manual ls, engine number x16xe or x16xel carnt make it out verry well.

    can you also advise me on the correct size socket for the bolt....

    thanx for your help, and im not very good at this pic editing stuff :rolleyes:
  2. cavwebmaster

    cavwebmaster CavWeb/VxON Forums Admin & Founder Staff / Administrator VxON Club Member

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    Location:
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    Drives:
    Modified Astra H Sporthatch 150 CDTI
    Bolts nearly always untighten anti clock wise (blue arrow) and I know 100% this is true in this case as I did a cambelt change not long back. Remember you will need a new stretch bolt though as they cannot be used again (about £3 from VX)
  3. allan1972

    allan1972 New Member

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    thanks m8

    just to clarify, its 100% the blue arrow direction to undo this bolt ?
    as i dont wont to snap the bolts head off, cos i no it can be very tight. lol

    any idea of the propper sized socket for this bolt, m8

    thanks allan
  4. Delbert

    Delbert Well-Known Member

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    It'll be anticlockwise - the blue arrow. But being a stretch bolt you'll need to fit a new one upon reassembly, so any doubt can be eliminated by purchasing a new bolt beforehand and examining the thread! Don't forget to tighten it to the correct torque and turn degrees!!!
  5. allan1972

    allan1972 New Member

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    thanks guys......

    one more thing also, is putting it in 5th gear and someone on the brakes, the correct way of locking the crank so the bolt can be undone ?

    and for tightening the nut too ?


    thanks
  6. allan1972

    allan1972 New Member

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    im being told its a e18 torx socket can any one confirm this before i go buy it in the morning.

    pls thanks

    allan
  7. Delbert

    Delbert Well-Known Member

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    That's what it is on my Z16SE engine (1.6 8v), so perhaps your 16v is the same.
  8. allan1972

    allan1972 New Member

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    kay i got the crank bolt off :) but the crank sprocket timing mark didnt line up, but the top 3-9 did so i put the pully back on, took out my locking tool , and tryd to give the engine more rotations to see if if would line its self up after more rotations, but as i started to turn it was easy then got realy hard to turn so iv stopped grrr. so now none of the timing marks line up omg and i can not rotate the engine by hand.

    1- so what do i do now just leave the timing marks mess`d up and remove belt and line all timing marks up by hand and put a new belt on ?

    2- as i understand i can not rotate the timing belt backwords to get 3-9 back like before, is that correct ?
  9. allan1972

    allan1972 New Member

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    ok i give up. its 0ne thing after another. now i can not get the timing belt tensioner nut undone, nearly took its head of. (needs better tools )

    so im going to get a garage to pick the car up,£££ as its in bits and let them finnishit of, or correct my **** up lol. the jobs just a little to big for me i guess

    or any one live near hyde in manchester. who can help with this jod ill p£y lol worth a try asking......

    i have a new timing belt kit and a new water pump, does any one have any guess at how mutch it could be to get the rest of this work done ?????

    thanks all :shame:
  10. Delbert

    Delbert Well-Known Member

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    Are you saying the locking tool was fitted whilst undoing the crankbolt? If so I'd suggest if the crank moved a tad whilst releasing the bolt chances are the crank drive sprocket would likely jump a tooth.
    If the timing marks are wrong rotating the engine isn't going to correct it. It's two rotations of the crank for one rotation of the cam, and thus two rotations of the crank will result in the cam ending up in the same position. And rotating the engine with incorrect timing is likely to end up with gubbins pieces touching and tears on your part.

    To get the timing correct I'd sugget get the pistons in mid position (quarter turn from TDC) - only works with a conventional inline four pot. In this position there's no chance that the valves will touch the pistons as you turn the camshaft. I think there are 24 teeth on the crank sprocket, so the timing mark should be 6 teeth out of position. Now position the cam sprockets six teeth out in the same direction and fit the belt. If the timing mark is 6 teeth in the forward position, rotating the crank 1.75 revolutions the timing marks should line up. Think I've got that right.

    Never rotate the engine backwards.

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