E46 320 320d Tapping noise when cold
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  1. #1
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    320d Tapping noise when cold

    Hi guys, just wondering if this is a problem with my car or if its just because I'm not used to diesels and bmw's, as this is my first of both, but when my engine is cold the car makes a fairly quiet tapping noise for a good 5mins of driving, bit like the typical vauxhaull corsa noise.

    it's not massively loud but you can hear it and it goes away when the engine is fully up to temp.

    Is this normal for these engines or is there something wrong with it? Maybe oil seals or something with wear as the car is higher mileage (118k)?

    thanks

  2. #2
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    Quite possibly the injectors if the sound increases with rpm?

    118k isn't high mileage for a bmw sludger but keep changing the oil and filter regularly, ensure the oil separator is changed regularly if it's the foam type or fit the plastic vortex
    if possible and get the swirl flaps out or at the very least checked?

    swirl flaps - http://www.bmwforums.info/general-gu...irl-flaps.html

    Sent from my GT-I9100
    Last edited by simonsays; 20-09-2012 at 18:23. Reason: link added

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  4. #3
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    Quote Originally Posted by simonsays View Post
    Quite possibly the injectors if the sound increases with rpm?
    118k isn't high mileage for a bmw sludger but keep changing the oil and filter regularly, ensure the oil separator is changed regularly if it's the foam type or fit the plastic vortex if possible and get the swirl flaps out or at the very least checked?

    Sent from my GT-I9100
    Top advise there

    118k high mileage just broken in


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  6. #4
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    Forgot to ask the basics but when was the oil and filter last changed and what oil did you use?

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  8. #5
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    Thanks for the replies guys.

    Swirl flaps are already out and ive recently changed to the vortex type seperator when I put on a new turbo, which also meant ive changed the oil and filter very recently, not even 1000miles ago.

    The oil was 5w40 fully synthetic, brand was Comma.

    The sound does increase with rpm, how do I go about checking the injectors?

    thanks

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  10. #6
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    Thanks for that eagle90, I was curios about the oil as the Hydraulic lifters can sometimes tap is the oil is old and thin and bad news about the turbo

    You can check the injectors via INPA diagnostic software running on a laptop, are you familiar with it?

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  12. #7
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    Im not familiar with it no. But I have a laptop and I'm computer literate so is it something I can get hold of and do myself?

  13. #8
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    Quote Originally Posted by eagle90 View Post
    Im not familiar with it no. But I have a laptop and I'm computer literate so is it something I can get hold of and do myself?
    Oh yes very much so, you just need an OBDII lead from the bay of e and access to the software

    dunno what os you're on but theres a couple of suitable links below

    http://www.bmwforums.info/ecu-diagno...ace-winxp.html

    http://www.bmwforums.info/ecu-diagno...ows-vista.html


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  15. #9
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    thanks for the help ill give it a go

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