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chicaneuk

N47 Nerves...

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Hi. I had my 520d into BMW a week or so ago for an oil change (not scheduled; but just trying to be proactive about the timing chain issue on these engines) and I noticed today driving my car around without the radio on that I can really hear a surprising amount of obvious ticking which follows engine revs, most noticable from around 1,300RPM up to about 2,300RPM.

 

Now one side of me is trying not to be paranoid about these wretched timing chain issues and just wondering if BMW have used a quite thin grade oil which is just highlighting general wear.. have certainly heard of original spec oil on older engines (this is a 2008, done around 125k) resulting in noisy motors and that going to just a marginally heavier grade sometimes really quieting things down. It certainly didn't sound anything like this pre-oil change so it makes me wonder if I had a heavier grade in before and the oil BMW have used just being significantly thinner? Despite having just paid through the nose for the oil change, I'm contemplating changing it out for something just a little heavier or just changing it generally just to see if the issue goes away... 

 

But the other side of me is thinking I need to get it checked out at a specialist as I could be moments away from a catastrophic failure. Any other owners got experiences of these engines.. especially them sounding noisy and being fine and going on for thousands more miles, and more specifically general sensitivity to the grade of oil used in terms of noisyness? 

 

Thanks. 

Edited by chicaneuk

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LL04 oil can be had in various grades 0W-30, 0W-40, 5W-30 and 5W40.  I doubt using anyone of those would be of sufficient enough change in viscosity to alter the noise of the engine.

 

What you might find is the garage did a flush and it has got rid of something that was clagging up the chain guides and tensioners.

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Hmm.. it was a BMW dealer so I would be a little surprised if they used any kind of flush as they're not known for using that kind of stuff at main dealers. But I suppose it is entirely possible. 

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Would heavier oil not be worse for the first start when cold as it is too thick to lubricate quickly ? 

I thought this was the worst case for the timing chain/tensioner  and is when I  was told to listen for it.

 

My 520S 2009  is nearing 195k miles and I have had since 130k and I am not aware of chain being done.

It had dealer  history for most of its life till I got it 4 year ago.  

 

I have been doing oil at about 10 k miles but a far bit of what I do is on long journeys which may be better for it.

Apart from turbo which was really actuator issue but was well worn nothing more than tailgate wiring issues.

 

 

 

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Long journeys are much better for your oil. Short trips leave acids in your oil that don't get a chance to get burned off. I'd change your oil much sooner if you only really do short trips. 

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First off, I've not done this but have seen that post before. I'm guessing here somewhat, but reckon there should be a bit more room to get to it on our E60 than the E90. At the very least I can't imagine it would be any harder than on an E90.

The procedure is the same for our E60 here in newTIS but like many instructions on newTIS they can be a bit vague in what needs to be done beforehand. The photos shown on newTIS are taken from an angle only possible with the engine out, which is for illustration.

 

For a better idea of where the tensioner is:

 

BMW-20-D-N47-Engine.jpg.10ff1e662ddbefb0354e8d967438481b.jpg

To the rear of the exhaust manifold, around the corner, as such, in above pic.

 

BMW_N47_19.jpg.303f85d7c3c8d1183fd1b13b7cacc29c.jpg

Rear view.

 

Keliuss

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On 09/11/2019 at 10:48, Deviant said:

Long journeys are much better for your oil. Short trips leave acids in your oil that don't get a chance to get burned off. I'd change your oil much sooner if you only really do short trips. 

 

I am driving about 50 miles a day so it's getting plenty of heat into it thankfully :) 

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1 hour ago, LF-E61 52OD said:

Been reading up on this and there seems to be some posts about just changing the top tensioner on some other BMW models with this engine as preventative.  Has anybody and experience of this .  Is it possible to get to it.

 

https://www.e90post.com/forums/showthread.php?t=1362678

 

 

 

Interesting! A previous car I owned with a timing chain, the tensioner was very similar to this and it simply was a case of remove the old one and install the new one. A few seconds of rattling whilst it pressurised and away you went. Presumably you could pull the fuel pump relay if you didn't want it to start and just crank it a few seconds to build the pressure anyway. 

 

Anyone N47 owners feeling brave enough to swap for a new tensioner? :) 

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Back in the days of Senator ownership when they were approaching 100k miles there was chat about replacing just the main chain tensioner. The concern with that is you are adding a single new component to a system that contains sprockets, tensioners  (plastic) guides, chains etc and these all wear together.  The new tensioner will behave differently to the old one which is worn in sync with the other components. Most owners swapped out the complete system, chain, guides and tensioner in one go but it was at the front of the engine so much easier.

 

I would ideally want to swap them all out at the same time.  If the engine is showing no signs of it resembling a rattle snake then I would leave it well alone and change the oil max 10,000 miles or yearly.

 

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1 hour ago, 535i Andrew said:

I would ideally want to swap them all out at the same time.  If the engine is showing no signs of it resembling a rattle snake then I would leave it well alone and change the oil max 10,000 miles or yearly.

 

These were my thoughts when I originally saw the E90 post. My chain was done by BMW with a previous owner so I'm really concerned atm.

 

Keliuss

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I know this is an old thread but I had to smile reading it as have experienced the exact same issue as the OP.

When she (195k 520 LCI E61) went in for the battery cable recall last autumn Doncaster BMW were very quick to point out an oil service was due in 600m. Normally I would just laugh but thought I would give the old girl a birthday and let them do it.

It's the wife's mainly and going into winter didn't have windows open much but I soon noticed a new/louder noise than before. Tappety/cam chainy rattle. Nothing to concern me yet at least but it must be down to their £80 a litre oil they recommend...

Is it possible to do the chain completely in a 5 series do we know?

Sent from my YAL-L41 using Tapatalk

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