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Thread: Cant undo cat convertor bolts.

  1. #1
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    VL 5 speed (sold), VS wagon

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    Default Cant undo cat convertor bolts.

    Having a real hard time trying to undo the cat converter bolts, used heaps of wd40 and still wont even turn! need to get it undone cause im replacing the stock manifold with some extractors. Anyone got some advice on how to get these bolts out?

  2. #2
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    I have 2 cars VZ sv8 6 litre and VU ute 5.7 litre

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  3. #3
    Not_An_Abba_Fan's Avatar
    Not_An_Abba_Fan is offline Exhaust Guru
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    Quote Originally Posted by black as View Post
    heat the bolts up with an oxy
    Heat the CAT up not the bolts. Apply the heat to the side of the flange where the bolts go through, get it nice and cherry red.

    They can break so be careful if you can't heat the cat.
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    Quote Originally Posted by DannyboyDS View Post
    I burnt my hand in a nasty way once using method one but thats because i'm a twat.

  4. #4
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    VL 5 speed (sold), VS wagon

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    cheers guys. got them undone now. extractors are installed, but now the fking car wont even start up!

  5. #5
    Nackerz's Avatar
    Nackerz is offline Rollin
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  6. #6
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    vl berlina wagon 6cyl

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    could you post a photo, I didnt think there would be enough room for extractors
    they usually give more noise and heat under the bonnet but no more power

  7. #7
    detox_nath83's Avatar
    detox_nath83 is offline Another VL Driver
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    heaps of room for extractors..
    noticeable amount of power/response as exhaust gasses are removed faster and not restricted

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