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1666matt

E60 530d engine tapping noise

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Hi all, i have noticed with my 2005 e60 530d 141k  that there is a tapping coming from what i think is the right hand side of the engine, i have tried searching for it but i cant find anything really.

 

 

My car sounds a little like this but not quite that bad

 

Has anybody had a noise like this or know what this is, Some people reckon injectors or tappets, or a blocked breather but it sounds metallic to me


I can video my car but i would not know how to upload the video.
Please help, thanks matt

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It could be a leaking/cracked exhaust manifold.

 

I think this has happened in the past to someone here

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Or the vacuum pump, the round thing on the front of the engine. You'd be surprised a cracked manifold can sound metallic. try and get some tissue around the exhaust and see if theres any sign of a leak

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A guy at work had a listen to the video and he said it still makes the noise when the revs drop off after revving it, so he thinks it can't be the injectors

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I had a cracked exhaust manifold which due to inaction then became a burst one (crack escalated to become a small hole).  Thing is, I could tell it was cracked and blowing since there were noticeable exhaust fumes in the engine bay, this was even when it was just a crack.  When it became a hole, with the car under load you could also hear the 'blowing a raspberry' type noise you get when a gasket goes.  At no point did my car sound like that.
 

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I am only suggesting the exhaust because i'm sure someone had a similar problem and it wasn't until he noticed exhaust smoke at the bottom of the engine as the leak was pointing down,

 

If all other avenues of searching for the noise are exhausted (sorry), it's worth checking

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Hi thanks for the reply. Could a manifold really make a metallic noise that, it just it sounds like tappets. I thought a manifold would be be raspy. I was hoping that somebody else has had the same noise/ problem. Thanks matt

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To be honest I can't seem go trace it. I went all over with a screwdriver ( not to sure what I was listening for) but it all sounded ok no unusual noises so I really am stuffed. I just wanted to be able to say to the garage exactly what it was. 2 years ago I bought a fully loaded 535d touring, I mean fully loaded heated rear seats HUD tv everything. Anyway it developed a fault with the rear suspension and the garage would not honour the warranty so I ended up with my money back. I don't want this to happen this time.

Thanks matt

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I had a cracked exhaust manifold which due to inaction then became a burst one (crack escalated to become a small hole).  Thing is, I could tell it was cracked and blowing since there were noticeable exhaust fumes in the engine bay, this was even when it was just a crack.  When it became a hole, with the car under load you could also hear the 'blowing a raspberry' type noise you get when a gasket goes.  At no point did my car sound like that.

 

 

Same here, mine started as a crack at the flange connecting the manifold to the turbo, only noticable with fumes in the cabin on startup, over time it started to blow and i finally pulled my finger out and bought a cast iron manifold off ebay, bargain price of £110!!. When i stripped the car down to get to the manifold much to my amazment the manifold was in very good condtion apart from the fact the flange off the manifold to the turbo had completly snapped off!!! My point is that at no point did my car make any metallic tapping sound ( i know every car can be different but just my experiance ) However once rebuilt my car made exactly the same sound, the sound ran side by side with engine RPM and happend on or off the gas, as Matt says i tried also to no avail to locate the area the sound was coming from. I then took the plunge and started to strip car back down to recheck all my work when i changed the manifold and then i found my mistake, i checked the injector nuts and injector 1 ( working from the bulk head ) was finger tight whoops!! :oops:  I tightened the nuts and jobs a good one the noise has dissappeared, i have since covered a good 500miles and the noise hasnt returned, i believe i was getting whats known as injector blow back. As i already said every car is different but hopefully my mistake can help someone in the future

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Ok i got my car back today, they fixed the thermostat but the tapping noise is still there, i stopped off at motech on the way home and they reckon that they had one in before doing the exact same thing but they could not find out what it was!!

Anyway i did a little listening around when i got home and i am convinced that its coming from the front of the engine maybe around the chain area?, Any more ideas please.

Thanks Matt

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Benzai is suggesting that you either get a diagnostic check performed yourself (google bmtechnic) or get a trusted workshop do the check for you and specifically check the injectors peformance readings. If one or more readings are way out that that would/could point to the root cause of the issue.

 

I diagnostic needs to be done really as listening round the engine, whilst it may help in some cases is not the most thourough appraoch as you have to do a diagnostic at some point.

 

I also suggessted that it might be the timing chain earlier (hoping not) but i also believe that the chains on these engines are at the rear of the engine towards the bulk head although not 100% sure but the point is, is that sound does travel so you can neve be 100% sure just by listening, trust me, i know as i've spent plenty trying to fault find my own issues.

 

Get a diag done is defo the next thing to do before anything else imo

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Just stopped off a at bmw specialist and they unplugged injector number 1 ( closest to the front of the car ) and the noise stopped, but they said it could be injector or piston!!

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