Please Have a Listen - Knocking

[Ben_D]

Developed a deep sounding knocking noise that changes with engine speed and is there when driving and whilst stationary in neutral, seems to be coming from drivers side towards rear of engine. Not the best quality but you can just about hear it, sounded better in Quicktime before I uploaded to youtube.

http://www.youtube.com/watch?v=H4qgnBBXJdw

Cheers

Ben

[JUDWAK]

sounds mad at one piont you think arr thats the crank shaft then it sounds different
well to me anyway

[tonupteabag]

sounds a bit like a diesel knock but it only seems to be one cylinder it might be nothing more than a damn good dose of injector cleaner and drive it hard to clear the crap out the cylinders... my 2.4 has a tantrum around 1500>2000rpm where it knocks its knackers off but it is just diesel knock on mine basically like pinking on a petrol engine when the timings to far advanced, mine tends to do it more when cold
there will be someone along with better info shortly mate

[surfenstein]

sounds like the exhaust is blowing.

[tonupteabag]

sounds like the exhaust is blowing.

Beggar missed that.....

[Ben_D]

sounds like the exhaust is blowing.

It has a powerflow 2.5" quad tail system on from the down pipe back but I did think exhaust was a possibility. You picking up on the deep sort of knocking sound that is in the background rather than any rattling or blowing noises as the revs increase? Think valve clearances need checked too but is the knocking sound that's bugging me just now!! Hoping it's not big end bearings or anything.

Cheers

Ben

[BUSHWHACKER]

Put it in 'D' handbrake on, press the brake pedal with your left foot and press the throttle to see if the knocking gets louder.

[Albannach]

I can't really hear anything wrong. But sticking some ATF or injector cleaner through it wouldn't go wrong. The tappety noise is probably the injectors. And have you checked the EGR pipe isn't blowing?

[surfenstein]

It has a powerflow 2.5" quad tail system on from the down pipe back but I did think exhaust was a possibility. You picking up on the deep sort of knocking sound that is in the background rather than any rattling or blowing noises as the revs increase? Think valve clearances need checked too but is the knocking sound that's bugging me just now!! Hoping it's not big end bearings or anything.

Cheers

Ben

The speakers on my laptop are crap.To be honest it sounds ok to me.I cant hear a deep knocking noise but i can hear what sounds like a tappet clatter.

[Ben_D]

Put it in 'D' handbrake on, press the brake pedal with your left foot and press the throttle to see if the knocking gets louder.

Just been out and tried that, volume stays the same.

can't really hear anything wrong. But sticking some ATF or injector cleaner through it wouldn't go wrong. The tappety noise is probably the injectors. And have you checked the EGR pipe isn't blowing?

Gets Redex though it every 3rd tank, EGR is blocked off, is there an easy way to check injectors?

Know I've described it as a knock but some many say it sounds like a pop. Bit of vibration too.

What would a dodgy big end sound / feel like?

Cheers

Ben

[surfenstein]

is your manual or automatic

[surfenstein]

Just been out and tried that, volume stays the same.



Gets Redex though it every 3rd tank, EGR is blocked off, is there an easy way to check injectors?

Know I've described it as a knock but some many say it sounds like a pop. Bit of vibration too.

What would a dodgy big end sound / feel like?

Cheers

Ben

check the injectors by cracking each nut on top of the injectors in turn whilst the engine is running,if the knocking goes away after you have cracked the nut then thats the injector thats knackered.

[skinflint]

could be a bearing starting to fail in either alternator/power steering pump /turbo

[Ben_D]

is your manual or automatic

It's an auto

[G1xer]

i have the same vehicle but manual, i have a similar noise but not nearly as loud. i only really noticed it after i replaced all of the belts.I was wondering if these engines have a harmonic balancer?It is a weird kinda booming noise and a slight viration??I think at least on mine that its the air box vibrating.
Does this sound the same?