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Tell me about Holden/GM OHC v6 timing chains.

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    Tell me about Holden/GM OHC v6 timing chains.

    So my cousin was looking to offload his sv6 commodore before travelling later this year.

    Came up with fault code, holden people told him it indicates stretched timing chains. Apparently holden went to lighter chains at some point and is common for cars with 6 figures to stretch chains. Stealership was throwing around figures like $3G for chain replacement if they did it.

    So, how hard is it to check tensioner(s), confirm/replace timing chains. My cousin was a diesel mech in a previous life and I may be able to get access to a mates workshop for a weekend if it helps.

    #2
    I know they are a days work for a bloke at a Holden dealership who does them often, so factor in two days labor for your first time.

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      #3
      Used to work at dealership........have done many. Its a days work.

      They are a medium level job. A few tricks with cam timing can catch out the person who doesnt know what to look for/have the guide on how to set the chains up.

      There is a software release that widens the range for the sensors to pickup the cam timing which can actually turn the light off. Has it had the ECu reflashed yet?
      Toyota related content here:

      https://www.facebook.com/tinkeringontoyotas86/

      https://www.instagram.com/tinkeringontoyotas/

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        #4
        Thanks guys, I will let him know on the reflash.

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          #5
          Do the chains ever actually let go, or just stretch a bit and confuse the ECU?

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            #6
            These are a POS. Mate got a SV6 and the chain promptly let go taking out the whole engine. Car was not overly high millage either.
            10.83 @ 125

            Quickest stock exhaust manifold stud 2JZ in Aus.


            Originally posted by cracka
            Some conclusions empirically were that a large protruding ridge like a prolapsed arsehole around the runner was largely beneficial.

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              #7
              Shitful, shitful engines.
              Originally posted by brewdles
              In short, some cunt at test and tune had a 250cc honda turning to 11ty and it sounded porn. Do that.

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                #8
                Bump

                Does anyone know for certain whether the alleged fix from 2007 production onwards sorted this problem? I’ve seen elsewhere that the affected engines are within a certain engine number range between 2005 and 07, but I thought I’d also heard of later engines doing it with only the later SIDI engines being properly reliable.

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                  #9
                  I have a SIDI motor with around 180,000km on it. It needs new chains.

                  Comment


                    #10
                    I wouldnt call them a shitful engine. Design wise they are really good. Just GM went a little overly cheap on the chains. Replace them once with the updated chains and updated valve cover gaskets and you are good to go nearly forever.
                    Originally posted by Rdyno
                    70ynu has to be the most retarded cunt here. "Help me please" me "you need to remove your head" him "fuck off cunt I'm to lazy fuck off out of my thread you told me to do something I don't want to do so you're a cunt fuck off can some one please tell me an easier way???"
                    Originally posted by Tripper
                    Its a tight battle between you and rogercordia for the most retarded member on here, thou i think you have it by 5 window licks

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