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Thread: Expansion tank cap!

  1. #1
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    Vehicle : Vauxhall Insignia

    Trim : SRi

    Engine : CDTi 160

    Year : 2009

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    Unhappy Expansion tank cap!

    Bit of a problem with the expansion tank cap on my Dad's Vec C....the Yellow top/cover has seperated from the body of the cap, with the body still screwed into the tank and i cant find any way at all of getting it out considering how ruddy tight they are anyway

    I tried evo stick last night in the hope that it would bond the cap back to the main body and enable it to screw out, but no...

    anyone else had this and how did you get it sorted?

  2. #2
    Full Member Big Sig's Avatar
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    New tank and cap?
    Now I need a turbo to keep up!

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    Quote Originally Posted by Big Sig View Post
    New tank and cap?
    Hoping we wouldnt have to go down that route, tank was only replaced last year as it was split....might be the only option though

  4. #4
    Ex Vec-C Admin ed taylor's Avatar
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    I belive gtr1000 had the same problem. I forget how he got his "back to normal".
    When you get your new cap. I suggest a squirt of silicone spray on the "o" ring, as that is what seems to seize in the cap.

  5. #5
    Regular Member gtr1000's Avatar
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    Quote Originally Posted by ed taylor View Post
    I belive gtr1000 had the same problem. I forget how he got his "back to normal".
    When you get your new cap. I suggest a squirt of silicone spray on the "o" ring, as that is what seems to seize in the cap.
    Here's my original thread http://www.vectra-c.com/forum/showth...hlight=coolant.

    I did post up somewhere that I'd sorted it - two flat blade screwdrivers and mole grips to pull the stuck bit. I did it on my own but would be easier with extra hands.

    Then you'll need a new cap, don't bother trying to repair the old one.

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    Vehicle : Vauxhall Insignia

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    Hmm, cheers...hopefully we can get it out.....anyone know where i can get a new cap from, other than Vauxhall?

    (Or if someone on here is willing to get me one on tradeclub, id be very grateful)
    Last edited by MadOnVaux!; 8th March 2010 at 17:08.

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    had this problem a while back, drove car as normal and when the engine was still hot a got some pliers on it and pulled hard! and pop out it came, hope this helps

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    Aye thanks Dave ....ordered a new cap anyway, so when it arrives i'll give it a go...didnt want to do owt before the new one comes

    *Although i didnt think doing it when its hot could be good due to the pressure of the system?

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    New cap arrived yesterday....old bit removed with screwdrivers and pair of grips. (and some added swearing for good measure)

    Put a smear of Vaseline on the O rings on the new one, and it goes in and out very easily (oooh err)...

    Pretty sure the Head Gasket has gone now though!!

  10. #10
    Regular Member muffking's Avatar
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    Same problem on mine, I think the heat makes them brittle. I've drilled the sides in mine to remove with a thin screwdriver, but does anyone know how much a new bottle it?

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