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[Astra Mk4/G] [98-04] astra 1600 16v ecotec code z16xe head bolts

Discussion in 'Astra, Corsa, Zafira, Meriva, Adam, Agila, Tigra & Nova [Includes AstraVan & ComboVan] owners forum' started by eddie lane, Sep 21, 2010.

  1. eddie lane

    eddie lane New Member

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    i am still trying to sort out an engine for this car .i got a bottom half used 2 piston out of the old engine.new rings big end bearings head skimed valve stem oil seals.the only problem is that when i came to torque the head down which was 25nm 90 90 90 45 i only could get it to 25nm 90 90 then the bolts were that tight i had to stop.the only way i could find out how tight the bolts were was with the torque rench each bolt was between 70 and 80 pound i do not know why it will not tighten all the way do you think it will be ok with that poundage.thanks
  2. marks152

    marks152 Well-Known Member

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    have you used a big breaker bar to tighten them, i had a similar problem with my dads saab when the HG blew on that, seemed like the bolts were bottoming out until i borrowed a big breaker bar, its amazing how much more pressure you can apply with a long bar, seemed so easy with a 3ft breaker than a 18 inch one i was using,
  3. eddie lane

    eddie lane New Member

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    yes used a big 2 1/2 foot torque wrench.and felt if i turned it any more it will snap.just have to take a chance and hope.thanks

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