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Thread: Unusual engine noise...

  1. #1
    Arrkon's Avatar
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    Unusual engine noise...

    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.
    Currently rolling in a SKODA!!!

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    Bradderz_1988's Avatar
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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 !!
    1999 Audi A4 1.8T Quattro Sport - Volcano Black

    Mods - Frankenturbo F21 Kit - 3" MAF - Saab Reds - THS Decat - Non Res Milltek - ECS Crank Pulley - 034 Snub + Bracket/Gbox Mounts - 1Z/S2 Clutch + Flywheel - 007p - ICM + EVAP Delete - PFR6Q Plugs - S4 B6 345mm Brakes - 300mm Rear Brakes - Goodridge Hoses - LCR Splitter -S4 Bumbers + Skirts/Mouldings - OEM Xenons - Apikol Diff mounts - Polytek'd Rear Diff Mount
    To do/planned -Eibach pro's - GT2871/76R + FMIC + ME7 (maybe) + Engine/stroker Build

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    Arrkon's Avatar
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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...
    Currently rolling in a SKODA!!!

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    Bradderz_1988's Avatar
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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
    1999 Audi A4 1.8T Quattro Sport - Volcano Black

    Mods - Frankenturbo F21 Kit - 3" MAF - Saab Reds - THS Decat - Non Res Milltek - ECS Crank Pulley - 034 Snub + Bracket/Gbox Mounts - 1Z/S2 Clutch + Flywheel - 007p - ICM + EVAP Delete - PFR6Q Plugs - S4 B6 345mm Brakes - 300mm Rear Brakes - Goodridge Hoses - LCR Splitter -S4 Bumbers + Skirts/Mouldings - OEM Xenons - Apikol Diff mounts - Polytek'd Rear Diff Mount
    To do/planned -Eibach pro's - GT2871/76R + FMIC + ME7 (maybe) + Engine/stroker Build

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    Quote Originally Posted by Arrkon View Post
    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.
    I've got exactly the same from time to time comming from the are box though. Quite odd.

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    Unusual engine noise...

    Quote Originally Posted by Bradderz_1988 View Post
    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
    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
    Currently rolling in a SKODA!!!

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    Unusual engine noise...

    Currently rolling in a SKODA!!!

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    Bradderz_1988's Avatar
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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.
    1999 Audi A4 1.8T Quattro Sport - Volcano Black

    Mods - Frankenturbo F21 Kit - 3" MAF - Saab Reds - THS Decat - Non Res Milltek - ECS Crank Pulley - 034 Snub + Bracket/Gbox Mounts - 1Z/S2 Clutch + Flywheel - 007p - ICM + EVAP Delete - PFR6Q Plugs - S4 B6 345mm Brakes - 300mm Rear Brakes - Goodridge Hoses - LCR Splitter -S4 Bumbers + Skirts/Mouldings - OEM Xenons - Apikol Diff mounts - Polytek'd Rear Diff Mount
    To do/planned -Eibach pro's - GT2871/76R + FMIC + ME7 (maybe) + Engine/stroker Build

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    bent rod?.....

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    Unusual engine noise...

    Quote Originally Posted by Byzan Pics View Post
    bent rod?.....
    Thanks got me panicking now lol

    Odd thing is, it's gone away now lol, comes back intermittently...
    Currently rolling in a SKODA!!!

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    Quote Originally Posted by Bradderz_1988 View Post
    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.
    Does that ticking change speed then?

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    Bradderz_1988's Avatar
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    One of the Aux pulley bearings ?? ageing belt ?? Sticky injector ???

    bent rod ..... whats one of them lol
    1999 Audi A4 1.8T Quattro Sport - Volcano Black

    Mods - Frankenturbo F21 Kit - 3" MAF - Saab Reds - THS Decat - Non Res Milltek - ECS Crank Pulley - 034 Snub + Bracket/Gbox Mounts - 1Z/S2 Clutch + Flywheel - 007p - ICM + EVAP Delete - PFR6Q Plugs - S4 B6 345mm Brakes - 300mm Rear Brakes - Goodridge Hoses - LCR Splitter -S4 Bumbers + Skirts/Mouldings - OEM Xenons - Apikol Diff mounts - Polytek'd Rear Diff Mount
    To do/planned -Eibach pro's - GT2871/76R + FMIC + ME7 (maybe) + Engine/stroker Build

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    Bradderz_1988's Avatar
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    Quote Originally Posted by Iceash View Post
    Does that ticking change speed then?
    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.
    Iceash likes this.
    1999 Audi A4 1.8T Quattro Sport - Volcano Black

    Mods - Frankenturbo F21 Kit - 3" MAF - Saab Reds - THS Decat - Non Res Milltek - ECS Crank Pulley - 034 Snub + Bracket/Gbox Mounts - 1Z/S2 Clutch + Flywheel - 007p - ICM + EVAP Delete - PFR6Q Plugs - S4 B6 345mm Brakes - 300mm Rear Brakes - Goodridge Hoses - LCR Splitter -S4 Bumbers + Skirts/Mouldings - OEM Xenons - Apikol Diff mounts - Polytek'd Rear Diff Mount
    To do/planned -Eibach pro's - GT2871/76R + FMIC + ME7 (maybe) + Engine/stroker Build

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    Quote Originally Posted by Bradderz_1988 View Post
    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.
    This is also my guess its defo coming from the airbox area

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    Bradderz_1988's Avatar
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    Quote Originally Posted by Iceash View Post
    This is also my guess its defo coming from the airbox area

    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
    1999 Audi A4 1.8T Quattro Sport - Volcano Black

    Mods - Frankenturbo F21 Kit - 3" MAF - Saab Reds - THS Decat - Non Res Milltek - ECS Crank Pulley - 034 Snub + Bracket/Gbox Mounts - 1Z/S2 Clutch + Flywheel - 007p - ICM + EVAP Delete - PFR6Q Plugs - S4 B6 345mm Brakes - 300mm Rear Brakes - Goodridge Hoses - LCR Splitter -S4 Bumbers + Skirts/Mouldings - OEM Xenons - Apikol Diff mounts - Polytek'd Rear Diff Mount
    To do/planned -Eibach pro's - GT2871/76R + FMIC + ME7 (maybe) + Engine/stroker Build

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    Quote Originally Posted by Bradderz_1988 View Post
    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
    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.

  18. #17
    Bradderz_1988's Avatar
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    Quote Originally Posted by Iceash View Post
    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.
    sounds like it maybe one of the abs reluctor's has cracked on one of the rear driveshafts have you checked these ??
    1999 Audi A4 1.8T Quattro Sport - Volcano Black

    Mods - Frankenturbo F21 Kit - 3" MAF - Saab Reds - THS Decat - Non Res Milltek - ECS Crank Pulley - 034 Snub + Bracket/Gbox Mounts - 1Z/S2 Clutch + Flywheel - 007p - ICM + EVAP Delete - PFR6Q Plugs - S4 B6 345mm Brakes - 300mm Rear Brakes - Goodridge Hoses - LCR Splitter -S4 Bumbers + Skirts/Mouldings - OEM Xenons - Apikol Diff mounts - Polytek'd Rear Diff Mount
    To do/planned -Eibach pro's - GT2871/76R + FMIC + ME7 (maybe) + Engine/stroker Build

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    Quote Originally Posted by Bradderz_1988 View Post
    sounds like it maybe one of the abs reluctor's has cracked on one of the rear driveshafts have you checked these ??
    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

  20. #19
    Bradderz_1988's Avatar
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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.
    1999 Audi A4 1.8T Quattro Sport - Volcano Black

    Mods - Frankenturbo F21 Kit - 3" MAF - Saab Reds - THS Decat - Non Res Milltek - ECS Crank Pulley - 034 Snub + Bracket/Gbox Mounts - 1Z/S2 Clutch + Flywheel - 007p - ICM + EVAP Delete - PFR6Q Plugs - S4 B6 345mm Brakes - 300mm Rear Brakes - Goodridge Hoses - LCR Splitter -S4 Bumbers + Skirts/Mouldings - OEM Xenons - Apikol Diff mounts - Polytek'd Rear Diff Mount
    To do/planned -Eibach pro's - GT2871/76R + FMIC + ME7 (maybe) + Engine/stroker Build

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    Iceash's Avatar
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    Good point well made. :-)

 

 

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