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Unusual engine noise...

Discussion in 'A4/S4 forum(B5 Chassis)' started by Arrkon, Jan 13, 2013.

  1. Arrkon
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    Arrkon Midlands regional Moderator Regional Rep

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    Guys, noticed an odd noise today...

    A "tick tick tick" that increases frequency with engine rpm, sounds similar to either a plastic flap or possibly a shorted HT spark click, but no obvious impact on engine running. Sounds more localized to the inlet manifold area...

    Any suggestions on what to check? Can't find anything obvious.
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  2. Bradderz_1988
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    Bradderz_1988 Dont replace it, Upgrade it !!

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    I noticed something similar near runner 1 @ injector but wasnt really that fussed as could only hear it with my head literally over it, only other thing is check its not coming from back of the valve cover as this could mean the pick up is starting to block up snd not enough pressure to get the oil to the CCT also check all pipe work check valves solenoids etc easiest way is get a screwdriver or 3/8 extension bar and just place it on s few components and listen through it like a stethoscope if thats how you spell it lol see if the noise is more audible through it !!
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  3. Arrkon
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    Arrkon Midlands regional Moderator Regional Rep

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    doesn't sound like its the CCT, sounds further forward than that. its quite prominent, can hear it outside of the car with the bonnet shut...
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  4. Bradderz_1988
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    Bradderz_1988 Dont replace it, Upgrade it !!

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    Use my method above see if you can pin point it to a certain component/area. oh and check the classifieds theres an S4 bumper with your name all over it lol
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  5. Iceash
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    Iceash Member

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    I've got exactly the same from time to time comming from the are box though. Quite odd.
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  6. Arrkon
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    Arrkon Midlands regional Moderator Regional Rep

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    Will have a nose around tonight...
    Yeah seen it mate, unfortunately with my WB conversion and new turbo, funds don't allow for it at the mo :(
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  7. Arrkon
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    Arrkon Midlands regional Moderator Regional Rep

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  8. Bradderz_1988
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    Bradderz_1988 Dont replace it, Upgrade it !!

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    Iceash if yours is near the airbox it may be the purge canister solenoid valve they do tend to tick will be louder if the nipple or pipes are split/cracked.
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  9. Broken Byzan
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  10. Arrkon
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    Arrkon Midlands regional Moderator Regional Rep

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    Thanks :lmfao: got me panicking now lol

    Odd thing is, it's gone away now lol, comes back intermittently...
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  11. Iceash
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    Iceash Member

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    Does that ticking change speed then?
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  12. Bradderz_1988
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    Bradderz_1988 Dont replace it, Upgrade it !!

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    One of the Aux pulley bearings ?? ageing belt ?? Sticky injector ???

    bent rod ..... whats one of them :jester: lol
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  13. Bradderz_1988
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    Bradderz_1988 Dont replace it, Upgrade it !!

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    not to sure but i would of thought so as the engine pulls more air the ecu will open the solenoid more so i would at a guess say yes it should.
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  14. Iceash
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    Iceash Member

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    This is also my guess its defo coming from the airbox area :detective2:
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  15. Bradderz_1988
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    Bradderz_1988 Dont replace it, Upgrade it !!

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    Take the airbox cover off and where the aircon pipes emerge in this area there will be a brown solenoid on the airbox with two wires going to it with 2 pipes either side one goes into the wing one to the turbo inlet pipe have a listen to the solenoid and have a 'GENTLE' poke at the pipes not to rough as the solenoids break down and ten to snap the nipples as i found out so i just bodged it as a new one is £75 from dealers, so if anyone has one spare and wants to post it me feel free lol
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  16. Iceash
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    I'll wait till it gets noisy all the time only notice it now n then. Least I know it's working. ABS is on my hit list then the dash. Think my Module has a crack in the connection somewhere. As it trips the Red Warning light then goes straight out. Stupid car lol.
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  17. Bradderz_1988
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    Bradderz_1988 Dont replace it, Upgrade it !!

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    sounds like it maybe one of the abs reluctor's has cracked on one of the rear driveshafts have you checked these ??
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  18. Iceash
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    Iceash Member

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    funny you say that. There is a crack in One of them as it pulses when you come to a stop. Just never set the abs alarm off before
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  19. Bradderz_1988
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    Bradderz_1988 Dont replace it, Upgrade it !!

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    It may have weathered/corroded slightly and increased the gap so the abs maybe picking it up id get it clamped up and spot welded to the shaft and then she what happens.
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  20. Iceash
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    Iceash Member

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    Good point well made. :)
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