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Thread: Astra gsi MK4 blowing noise on coldstart-up

  
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    Daz550's Avatar
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    Lightbulb Astra gsi MK4 blowing noise on coldstart-up

    Hi i have recently brought a mk4 astra gsi, the car has only done 40K, when i start the car from cold or around 60 -70 degrees C there is like a high pitched blowing noise coming from the front of the engine when i rev the engine to around 1500 rpm to 2000 rpm, i have asked a few mates and they reckon that it may be the exhaust mainfold gasket as once the engine is hot and up to tempurature, it no long makes the noise, is there anything else it could be?

    Cheers in advance for any advice

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    Mine did that, I thought it was my gasket but it was a snapped stud in the head, bit of a ******* to get out!
    GSi

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    GSI _F1N's Avatar
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    Yeah broken or missing stud on manifold mate.
    *** 2003 GSi - DROPPED 40MM - FULL SCORPION SYSTEM -PIPER PANEL FILTER - FORGE DUMP VALVE - FROUNT MOUNT INTERCOOLER - STAGE 2 MAP - VXR TURBO - RUNNING 260BHP ***

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    oh right, is it easy to replace, or could it just be loose

    Cheers

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    If it missing etc then they are easy enough to replace and cheap enough to buy, if its a snapped stud then its a little bit more difficult, I bought a stud extractor off ebay to remove mine.
    GSi

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    ok kl is there anywere you would recommend if i did need to get one ?

    Cheers

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    Also could be a small crack in the manifold or maybe your exhaust were it meets the turbo ain't sealed fully and once warm expands and seals

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    i have this also. not too bad at the moment, dreading taking the shield off in case i get a nasty surprise

    Note to the OP, i would change that you have "brought" an astra gsi if i were you. It has been a touchy subject on here recently

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    ok kl what is the easiest way to get to the manifold and check it out ?

    cheers

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    take the shield off the turbo and check from the top, its only held on with 3 torx screws, once the shield's off you will be able to see most of the studs from the top but bottom ones will be a little harder to get to.
    Just Another GSi Build Thread (Big BHP Build) - Feedback Thread (Comments appreciated )

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