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daniboy71

Engine noise under load

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Any ideas - (2011 520d with 130k)?

 

When cold, and only when under load (i.e. not when revving in neutral, and only when pulling away) there is a distinct, fast paced clattering/tapping noise from the engine, rising with the revs. It goes away once the engine is warm, but is very noticeable.

 

Thinking glow plug/injectors - but why would it only happen under load and are there any ways of confirming it without a garage?

Edited by daniboy71
Updating

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That could be it - it does have a bit of an exhaust leak sound about it & is a lot louder than I've ever heard from diesel injectors before. I'll see if I can get a look at the manifold.

 

thx GJJ

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Hi @daniboy71 - Did you get this diagnosed/fixed?  I have the exact same issue, happens about 50% of the time from a cold start and an unhealthy knocking noise, again only under load, until warm - then all good.

Any ideas?  I see lots of threads on something like this but no answers! :( 

Thanks in advance....

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9 hours ago, Simo_UK said:

Hi @daniboy71 - Did you get this diagnosed/fixed?  I have the exact same issue, happens about 50% of the time from a cold start and an unhealthy knocking noise, again only under load, until warm - then all good.

Any ideas?  I see lots of threads on something like this but no answers! :( 

Thanks in advance....

My 520d auto does something much the same from cold but is perfect when warmed up, hold it on the brake in drive and its quite loud and you can feel the car under load pop it into neutral and the noise goes almost completely. Could be the torque converter or old oil in the gearbox so going to have a transmission service when the car goes for its normal service in a few weeks time and I'll report back.

Edited by Markn47

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On ‎11‎/‎02‎/‎2018 at 8:56 PM, Markn47 said:

My 520d auto does something much the same from cold but is perfect when warmed up, hold it on the brake in drive and its quite loud and you can feel the car under load pop it into neutral and the noise goes almost completely. Could be the torque converter or old oil in the gearbox so going to have a transmission service when the car goes for its normal service in a few weeks time and I'll report back.

Thanks @Markn47

Called a couple of indies that I expected to say "oh that, yeah its the …." but nothing.  Plus trying to get them to diagnose will be a right pain in the ****, they'd have to have it from cold, and only have about 10 mins to find the problem!

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As promised I'm reporting back and I have to say what a difference. Autokraft changed my gearbox oil and pan etc and also re-coded my gearbox and the noise under load when holding on the brake when cold has gone and the gear changes are also smoother so a gearbox service is a no brainer if you ask me.

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Did the they give any indication as to why the box was the source of the noise? Usually these things are very quiet.

 

My E60 was much smoother after a 'box service it can be very noticeable.

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12 hours ago, 535i Andrew said:

Did the they give any indication as to why the box was the source of the noise? Usually these things are very quiet.

 

My E60 was much smoother after a 'box service it can be very noticeable.

Hi Andrew..

I didn't tell them of a possible issue with box as I think it was the old oil going through the torque converter when cold causing what seemed like the car wanting to move when stationary. It is like chalk and cheese the difference and I'm well happy with AutoKraft's service. 

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10 hours ago, Markn47 said:

Hi Andrew..

I didn't tell them of a possible issue with box as I think it was the old oil going through the torque converter when cold causing what seemed like the car wanting to move when stationary. 

 

All autos will creep. In drive you will always get the car trying to move or creep in D or R. When the engine is cold in will idle faster making it then creep faster so you need to be aware when manoeuvring when it's cold.

 

Glad it's all sorted, it always makes you wish you had it serviced sooner!

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I have the gearbox oil service on my todo list, need to find a garage in the west midlands though. 

 

Any suggestions?

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On 20/03/2018 at 7:21 PM, Markn47 said:

As promised I'm reporting back and I have to say what a difference. Autokraft changed my gearbox oil and pan etc and also re-coded my gearbox and the noise under load when holding on the brake when cold has gone and the gear changes are also smoother so a gearbox service is a no brainer if you ask me.

 

Was this the one in Solihull by any chance?

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25 minutes ago, roundy said:

I have the gearbox oil service on my todo list, need to find a garage in the west midlands though. 

 

Any suggestions?

 

Isn't one of the main ZF UK agent not in or near that part of the world?

 

https://www.zf.com/corporate/en_de/company/company_profile_zf/locations_worldwide/europe/great-britain_locations/great_britain_zfworldwide.jsp

 

But my geography of deepest darkest Ingurlandshire isn't great.:D

 

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23 hours ago, roundy said:

I had this and it turned out to be the Glow Plug Control Unit Relay Module.

 

 

I think this is what mine is.  No change in noise if I apply the accelerator with the brakes on (ie loading the gearbox).

It's totally related to engine load when cold, usually 2k revs plus.  Once warm, no issues at all.

@roundy - assume your fault was only apparent while cold too, in which case how did they go about diagnosing the problem?  Or is this a common issue?  Oh and is there only one module?

Thanks in advance

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Yes issue in only in winter pretty much, once warm no issues at all.

 

I have the carly app and dongle on my phone to confirm the error codes, as the work was being done though i also had the 6 glowplugs done.  

 

I did find swapping the glow relay first cleared the faults and the issue had stopped. 

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A few threads on here covering the issue and that's how i came across them. 

 

I spoke to bmw regarding the module i needed, the are a few BERU models but should be easy enough to track down.

 

Something similar to this - https://www.ebay.co.uk/itm/Glow-Plug-Control-Unit-Relay-Module-BMW-E60-E61-520d-N47-engs-12217798000/273067632968?epid=693912093&hash=item3f94196948:g:jgMAAOSwry1aLxQh

 

I always give my reg plate before ordering anything to be sure. 

 

Edited by roundy

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Yes i'll go with them, i almost went with a bmw specialist in Stourbridge but they are in the £540+ bracket for everything :( 

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22 hours ago, roundy said:

Yes issue in only in winter pretty much, once warm no issues at all.

 

I have the carly app and dongle on my phone to confirm the error codes, as the work was being done though i also had the 6 glowplugs done.  

 

I did find swapping the glow relay first cleared the faults and the issue had stopped. 

Great info!  Thanks @roundy really useful stuff

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