Tinkling noise during acceleration?

[jamesgarbett]

I seem to be getting a tinkling noise which sounds like it's coming from the back of the car at low engine speeds

Any ideas what it could be?

 

[srhutch]

At a guess it's pinking, what fuels are you using?

 

[Taz]

At a guess it's pinking, what fuels are you using?

would pinking sound not come from under the bonnet?

 

[Drshemming]

check one of your rear springs isn't broken if it's a metal tinkling sound, seems a very common problem.

 

[Maniac]

Heat shields loose, rear springs, exhaust back boxes failing, that's the common stuff at the back.. Pinking would be usually under hard acceleration and Obviously from the front.

 

[lacroupade]

Pinking is highly unlikely in this day and age.

Its basically fuel pre-igniting because the timings out (too advanced).....if thats happening then your ECU (which these days obviates this phenomenon) is bolloxed and you have a very expensive problem on your hands.

 

[WizzEssex]

Mine was the firewall- (though I know yours is rear-end noise)

 

[T2FFN]

Is it only when pressing the accelerator? I think its the fuel pump. Both Z4's I've had do it, its like a metallic swirl noise.

 

[srhutch]

Pinking is highly unlikely in this day and age.

Its basically fuel pre-igniting because the timings out (too advanced).....if thats happening then your ECU (which these days obviates this phenomenon) is bolloxed and you have a very expensive problem on your hands.

had it on my 2.5si before the head was replaced.

 

[Gremlin500]

Ummm, just a question, but can we post sound clips on the forum?
Just thinking, it would be very useful.
Excuse me if it's a dumb question.

plus a how-to for dummies like me, obviously!

 

[lacroupade]

Pinking is highly unlikely in this day and age.

Its basically fuel pre-igniting because the timings out (too advanced).....if thats happening then your ECU (which these days obviates this phenomenon) is bolloxed and you have a very expensive problem on your hands.

had it on my 2.5si before the head was replaced.

What was causing it? I dont see how a knackered head could advance the ignition timing?

 

[Gremlin500]

I seem to be getting a tinkling noise which sounds like it's coming from the back of the car at low engine speeds

Any ideas what it could be?

*BUMP*

Or is it the driver tinkling? Incontinence, perhaps?

 

[Bing]

Speed fairy

 

[srhutch]

Pinking is highly unlikely in this day and age.

Its basically fuel pre-igniting because the timings out (too advanced).....if thats happening then your ECU (which these days obviates this phenomenon) is bolloxed and you have a very expensive problem on your hands.

had it on my 2.5si before the head was replaced.

What was causing it? I dont see how a knackered head could advance the ignition timing?

I've no idea and the head replacement was due to HVA's, but it never seemed to do it after the head was replaced.

 

[lacroupade]

Being the owner of an ultra-reliable four-pot, what are HVAs when they are at home? :?

 

[Taz]

Hydraulic value adjusters

Sent from my GT-I9100 using Tapatalk 2

 

[lacroupade]

Ah so! Do they just maintain valve clearances, or is it some kind of VTEC-type technology? :?

 

[Adamski]

They maintain valve clearance. VANOS is the BMW equivalent of VTEC IIRC

 

[Stuart Truman]

I thought this was going to be a thread about nervous passengers...

 

[Ewazix]

I thought this was going to be a thread about nervous passengers...

Never mind nervous passengers, the poor OP must be p**ing himself! So far he needs a new head, engine management unit, VANOS and assorted heat shields!

I'd get a friendly local or indi to stick it on a ramp for an opinion and save the fretting .