BMW 520i why engine sound like diesel engine is it normal?

[Don Lim 99]

Hi,

I just got my 520i today. I find the engine sound like a diesel while start.. is it normal?

 

[ac323]

Tiak Tiak Tiak.............









cheeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeers

 

[Calvyn Teo]

If you open the bonnet, it will sound like Diesel engine but half as loud. If you close back the bonnet, it should not sound like one.


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[Don Lim 99]

When I closed the bonnet I still hear the tiak tiak sound... when I open the bonnet is even louder.. is it normal because got turbo? my 325i don't have this sound..

 

[flagship1974]

It's normal I guess.

 

[Calvyn Teo]

When I closed the bonnet I still hear the tiak tiak sound... when I open the bonnet is even louder.. is it normal because got turbo? my 325i don't have this sound..

Best is to have your mechanic take a look at it.


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[Don Lim 99]

I just got the car yesterday.. is still under lemon law.. they say is common because is turbo.. if 523 is very smooth and quiet.

 

[1st gear]

If it's the new G30 from PML, I think they no longer sell 520 gasoline.
It should be a diesel 520.

If it's the earlier F10 or E60, then perhaps you should get your mech to take a look.
Should not sound like a diesel.

 

[CY Wong]

Not sure 'bad' is the sound, I switch from Lexus V6 non turbo to F10 520i, I'm also not use to the engine note. Sounds like diesel engine to me as well.

My friend E200 also sounds like diesel engine to me. And now my current G30 530i, the sound still no wear near the creamy sounding V6 I had before.


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[ml5775]

I presume you just got yourself an F10 520i running an N20 engine. Then yes, it's very normal. It sounds more diesel than a 520d.

According to BMW, it's the direct injectors solenoids in action. Somehow, it only happens for the N20 but not other engines that uses the same injectors.



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[Don Lim 99]

Thanks.. at least I know is normal..
today I hear another noise like so water sucking sound with then air con is on.. I try off the air con then the sound is gone..

 

[cooldaddy]

You may need a ac flush

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[Don Lim 99]

Cool.. I try to change the coolant and and let the air out.. there are still some noise.. will try ac flush. Thanks

 

[ml5775]

Cool.. I try to change the coolant and and let the air out.. there are still some noise.. will try ac flush. Thanks

The F10 is quite prone to condenser damage due to small stones entering from the front grill & lower grill at high speeds. Once the condenser had been damaged, gas will leak & the compressor will cease.

I've had to replace both once and installed a protector mesh to prevent a repeat. Heavy footers, take note.

Don, better to bring it in for aircond check. Water sound could be as simple as clogged drainage from cooling coil but better be safe.



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[Don Lim 99]

ok ok.. thanks..

 

[Codewerx]

It's the injectors.

The n20 injectors tends to be noisy over time ...

 

[Vodka]

It's likely to be the idle pulley/ deflective pulley.

The bearing inside is worn

 

[Don Lim 99]

i ask around.. all tell me is the direct injecter that cause the diesel sound.

 

[Flyer31]

So is there any way to resolve this issue? Have to change the injector?

 

[Don Lim 99]

i heard there is no way to solve unless you can car.. hahah