Cam cover under pressure help !
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    Cam cover under pressure help !

    I have a slight problem with my engine

    She is loosing oil (1ltr /week) stalling and after a run, if i take the oil cap off there is a burst of air (sucking the cap down)

    These engines have a common problem with the rocker cover.

    Are these the symptons of a faulty rocker cover ?


    Thanks in advance
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    Re: Cam cover under pressure help !

    what engine is it?
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    Re: Cam cover under pressure help !

    Z16XEP
    I haven't failed. I've just found 10,000 ways that won't work

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    Re: Cam cover under pressure help !

    Has anyone had this problem before?
    I haven't failed. I've just found 10,000 ways that won't work

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    Re: Cam cover under pressure help !

    Stolen off Google:-

    with the engine running, and all vac pipes and breather pipes connected, remove the oil filler cap and note the engines response, there should be a notable change in engine noise and idling behaviour, if so you need to replace the camshaft cover as the breathers inside are blocked up, there is no way to clear them and replacement is the only option, this fault has appeared on several Z16XEP engines with high mileage

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    Re: Cam cover under pressure help !

    Quote Originally Posted by Paul View Post
    Stolen off Google:-

    with the engine running, and all vac pipes and breather pipes connected, remove the oil filler cap and note the engines response, there should be a notable change in engine noise and idling behaviour, if so you need to replace the camshaft cover as the breathers inside are blocked up, there is no way to clear them and replacement is the only option, this fault has appeared on several Z16XEP engines with high mileage
    Took cap off and the engine was running like a lab rat

    Took dipstick out with engine running and it tries sucking the dipstick back down !
    I haven't failed. I've just found 10,000 ways that won't work

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    Re: Cam cover under pressure help !

    Quote Originally Posted by Neo_Daz View Post
    Took cap off and the engine was running like a lab rat

    Took dipstick out with engine running and it tries sucking the dipstick back down !
    i seen this on a astra wasnt with high miles at all just seems to be a common fault in these engines.

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    Re: Cam cover under pressure help !

    Fixed !!

    Installed new rocker cover this morning and the vacuum build up has gone, all the power is back .
    It's like having a brand new car.

    I'll keep an eye on the oil just to make sure she's not still an oilaholic.
    I haven't failed. I've just found 10,000 ways that won't work

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    Re: Cam cover under pressure help !

    With modern cars, many have a hose from the filtered air (between the filter ant the TB) that allows air into the engine to flush out the crankcase/rocker cover fumes that are drwn through another hose to the inlet manifold/lower throttle body.
    I wpould suspect, if your engine was like this, the in breather was gummed up and needed cleaning out.

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    Re: Cam cover under pressure help !

    Quote Originally Posted by Gordo View Post
    With modern cars, many have a hose from the filtered air (between the filter ant the TB) that allows air into the engine to flush out the crankcase/rocker cover fumes that are drwn through another hose to the inlet manifold/lower throttle body.
    I wpould suspect, if your engine was like this, the in breather was gummed up and needed cleaning out.
    On this engine , the filter is built into the rocker cover and the filter cannot be cleaned or replaced.

    Poor design by vauxhall !
    I haven't failed. I've just found 10,000 ways that won't work

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    Re: Cam cover under pressure help !

    or you could say brilliant design by vauxhall, as you just had to buy a new one from them.

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    Re: Cam cover under pressure help !

    Quote Originally Posted by DarrenH View Post
    or you could say brilliant design by vauxhall, as you just had to buy a new one from them.
    Ties in nicely with the disposable car industry comment!

    Designed to be replaced not repaired....

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    MIGWeb User roosta233's Avatar
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    Talking Re: Cam cover under pressure help !

    Just had service done on mine which is an 08 astra 1.8 sri and this i have found is a common problem my mate whos a mechanic has told us it doesn't matter how many miles are on clock it just happens and to get it sorted, its down to a diaphram which is built into the rocker and it tends to tear and thats when the problems begin, i have to do it in mine and it only has done 37k.

    Hope this helps!

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