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Thread: VVT Engine Rattle.

  1. #1
    Regular Member VVT-i-MATT's Avatar
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    Exclamation VVT Engine Rattle.

    Guys and Gals,

    I've started to get the "knock" now on startup... It happened for 4 times over the last 2 days. It only happens when cold, and I want to get it fixed before my car ends up sounding like a Taxi.

    I found this on another site (for Astras but the same Engine):

    ----------8<-----SNIP----->8----------

    Z18XER vvt engines don't have hydraulic tappets, the Z18xe do. 5w30 is the oil for all Astras.
    It has oil control solenoid valves on the variable cams. Found this also from the sepos

    2008-2011
    Astra, Aveo, Cruze, Wave - Engine lack of power with DTCs P0011, P0014, P000A, P000B, P0012, P0015 or engine rattle noise
    Remove the oil filters from the camshaft position actuator solenoid valves
    Don't replace the camshaft position actuator solenoid valves
    10-06-04-016

    ----------8<-----SNIP----->8----------

    Does this mean anything to anyone and do you think it will help?

    There is a lack of power, I've noticed over the last few days, and i have the rattle but no codes.

    Any help would be greatly appreciated.

    Matt

  2. #2
    VIP-Member Das's Avatar
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    Vehicle : Lada

    Trim : Riva

    Engine : 6.0 V12

    Year : 1954

    Mileage : 567890987

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    It has oil control solenoid valves
    Im sure that Benny has said before that this is the issue.

  3. #3
    Regular Member VVT-i-MATT's Avatar
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    Quote Originally Posted by DasArab View Post
    Im sure that Benny has said before that this is the issue.
    I did do a quick search for "startup knock" but couldn't find anything in the first 5 pages.
    Found a how too on a US site about removal and cleaning etc.
    Not sure it will help loads, but I'm figuring I'll give it a go tomorrow when he engine is cold, and see if it make a difference on the start up. I hope so it's starting to drive me mad... I hear it every time I start from cold. and up until the other day when I did my oil change she never made a sound.

    Pandora's box opened? Maybe!

    Matt

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    Like this?

    [ame="http://www.youtube.com/watch?v=vsYrOkD94zQ&list=UUe5HxHIneHpVh9skXdoXpzg& index=4&feature=plcp"]Vvti Rattle on Start - YouTube[/ame]

    Mine does it on the odd cold start

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    Engine : Z18XER


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    A Vauxhall tech told me to take the gauze filters from these valves and bin them thats what they do.

  6. #6
    Regular Member MACVVT's Avatar
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    Vehicle : vectra c

    Trim : sri

    Engine : 1.8 vvt (XE18XER)

    Year : 2008

    Mileage : 28,000

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    If i remember right there is something to do with a oil lift on the vvt engine , will check back through forum, my garage always flushes these engines before a oil change.

  7. #7
    Regular Member disco dan's Avatar
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    following thread.

  8. #8
    Regular Member MACVVT's Avatar
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    Vehicle : vectra c

    Trim : sri

    Engine : 1.8 vvt (XE18XER)

    Year : 2008

    Mileage : 28,000

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    Thread one ;- "my 1.8 petrol sounds like a diesel" posted8th feb 2010 , this may help. type in search , sorry cannot get link to work.

  9. #9
    Regular Member VVT-i-MATT's Avatar
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    Thanks for the pointers guys. Been digging about a bit and it seems it's very common though not always harmless. I'm going to get ride of those gauze filters and see what happens.

    I checked that post, thanks for finding it, it was on page 11 on my search...

    The video in the link is pretty much it yes, although maybe not quite that bad want to sort it though before it gets to that.

    Cheers,

    Matt

  10. #10
    Regular Member patch22's Avatar
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    Vehicle : vectra

    Trim : .....................

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    mines done this for the last 12 months got used to it now, never gets any worse,no loss of power agreed would be better if it didn't, had the filters out checked them and replaced will watch with interest to see if binning them has the desired effect,oh and strangely mine never does it if its parked facing up hill weird! was told on here a while back it was nothing to worry about begining to believe that now

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