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Thread: 1.8vvt knocking on start-up

  1. #1
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    Default 1.8vvt knocking on start-up

    Hi all, (Help please)

    Just took ownership of a 1.8vvt 06 Vec-c.
    65K, Some service history but serviced & MOT by garage before i collected on friday.
    When the car starts there is a slight knocking for a few seconds. A little like a diesel knocking but not quite a loud.
    Don't remember it being there when i test drove car. Maybe a function of the Service?

    Any ideas???

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    if its tapping mine does it, sure my old man said it was summat to do with the fuel injection, could be wrong tho, nothing bad tho, supposed to do it apparently lol

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    Regular Member alanv6's Avatar
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    Your camshaft sprokets clatter on start up, there are some later modified ones that can be fitted. Dont expect a cheap job though..

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    Thanks guys.

    It's defo a knocking noise as opposed to tapping if you get what i mean. Need to ring garage about warranty. pain in the ass i live so far away from were i bought it though, bet they say i have to take it back to them as it was a small independent garage.

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    Regular Member disco dan's Avatar
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    mine does exactly that, would it not be the fact that the oil needs a second to get to the top of the engine?

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    Not sure mate, just sounds awful and seriously unhealthy. Be a rubbish design if noise was as a result of getting oil around.

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    mm, but it is vx!! mine kicked in straight after an oil change. lasts a second or so then goes, but WONT do it if the engine is hot ie knock it off then fire it straight back up.

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    Mine the same, test drive fine, service then collect it and now stupid knocking noise. Shame i bought it in preston and not lincoln i'll have to wait a few weeks till i can take it back to garage.

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    Regular Member alanv6's Avatar
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    The camshaft sprockets are oil fed as the vvti system is worked through the variable camshaft sprockets. over night the oil drains out of them which results in the knocking noise you hear from cold until oil pressure is up.
    The new modified sprockets come with a new oil return part in them.
    Fitted a few to customers cars and this cures it..

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    East Midlands - Regional Organiser new boy's Avatar
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    Engine : 2.0 TURBO

    Year : 07

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    Quote Originally Posted by alanv6 View Post
    The camshaft sprockets are oil fed as the vvti system is worked through the variable camshaft sprockets. over night the oil drains out of them which results in the knocking noise you hear from cold until oil pressure is up.
    The new modified sprockets come with a new oil return part in them.
    Fitted a few to customers cars and this cures it..
    Im going to try that with my vx dealer been back 3times still does it ..

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