Ohhh Ive got a noise
#1
Ohhh Ive got a noise
I am a home DIY bloke who has never heard a big end going before and am not sure whether it is or not. The noise seems to come from under the tmic somewhere when stood with the bonnet up.
As per the video below, it only happens around 2500 and a slight recurrance a little higher up, it does not make the noise whatsoever when lifting off and letting the revs die back to idle. The car seems to pull just fine.
Mods include sti pinks, vf24 turbo, mapped since feb 2012, running reasonable timing (no knock) and 18psi peak dropping to 15.5 at redline. Any noises on deceleration are pops from the exhaust (3" turbo back). One other thing I noticed was the rubber flywheel cover has fallen forward onto the engine so can see it spinning but doesnt seem to be causing this noise.
Any ideas from the more experienced engine guys?
As per the video below, it only happens around 2500 and a slight recurrance a little higher up, it does not make the noise whatsoever when lifting off and letting the revs die back to idle. The car seems to pull just fine.
Mods include sti pinks, vf24 turbo, mapped since feb 2012, running reasonable timing (no knock) and 18psi peak dropping to 15.5 at redline. Any noises on deceleration are pops from the exhaust (3" turbo back). One other thing I noticed was the rubber flywheel cover has fallen forward onto the engine so can see it spinning but doesnt seem to be causing this noise.
Any ideas from the more experienced engine guys?
#2
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Join Date: Mar 2011
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could be wrong but sounds like the early signs of a bottom end knock to me !!
hard to tell from video inside the car as this dampens the noise and masks it
my other halfs car sounded very similar but a lot louder when she first bought it ,its currently on engine stand as we speak awaiting tear down lol
im sure there are vids on youtube of knocking imprezas have a listen as may give you an idea
seems to be around 2.5k the knock as you increase and decrease revs can be heard here
i await a more expert opinion which im sure youll get !!
hard to tell from video inside the car as this dampens the noise and masks it
my other halfs car sounded very similar but a lot louder when she first bought it ,its currently on engine stand as we speak awaiting tear down lol
im sure there are vids on youtube of knocking imprezas have a listen as may give you an idea
seems to be around 2.5k the knock as you increase and decrease revs can be heard here
i await a more expert opinion which im sure youll get !!
#4
Scooby Regular
iTrader: (23)
Sorry to say mate but it does sound a bit like the death rattle having been there with previous scoobys, My advice would be to drop the oil and have a good look at it, or even drop the sump and look in there too, Does sound like its in the early stages to me though, My guess would be cylinder 3 nearest the turbo. See if you can do an under bonnet vid, Just pull back on the throttle body when its running to rev it.
Last edited by The Pink Ninja; 08 January 2013 at 10:06 PM.
#7
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i would start saving now mate after listening to that second vid ....definately sounds like death rattle
like said drop oil and filter and also sump and check for metal particles ,magnets are handy for this
like said drop oil and filter and also sump and check for metal particles ,magnets are handy for this
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#8
I knew it was bound to come (hence my slightly sympathetic timing map) as the previous owner didnt look after it, I change the oil every couple of thousand miles but if the damage was already done, nothing can help it so onwards and upwards.
Maybe make a little more scope for more power too, nothing mad though.
#9
Fear is the wrong word
I knew it was bound to come (hence my slightly sympathetic timing map) as the previous owner didnt look after it, I change the oil every couple of thousand miles but if the damage was already done, nothing can help it so onwards and upwards.
Maybe make a little more scope for more power too, nothing mad though.
I knew it was bound to come (hence my slightly sympathetic timing map) as the previous owner didnt look after it, I change the oil every couple of thousand miles but if the damage was already done, nothing can help it so onwards and upwards.
Maybe make a little more scope for more power too, nothing mad though.
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