Here is my description of the noise, you can hear it while driving like i wrote. Valve tinkle??
And changing rod bearings didnt make difference to the noise what i was worried.
I know its a long shot, but propably worth ruling out just in case, but the last rattle I had turned out to be the lower part of this exhaust bracket (number 10). It had rusted off and was hanging down and rattling against the exhaust (it would only resonate at certain revs). I think its quite a common for these to rust.
Here is my description of the noise, you can hear it while driving like i wrote. Valve tinkle??
And changing rod bearings didnt make difference to the noise what i was worried.
It quite sounded like that on my car, but it turned out to be the VANOS unit and the timing chain tensioners. There is a video that my friend took for the sound of the exhaust but you can hear the rattle clearly when I stab the throttle on idle at 00:14 to move the car. And on the end of the video when I'm revving the engine for the exhaust sound, you can hear again the rattle on the first and second stab on the gas when the engine is on idle and low RPM's at 00:31 & 00:34.
BMW E39 ///M5 '99 Oxfordgrun Metallic II euro spec. Bilstein shocks, Koni springs, Hella head and tail lights (facelift), full shadowline, black interior, double glass, full rear curtains. Sold;(
BMW E38 740i Individual '99 Oxfordgrun Metallic II euro spec. Green/Green. Full shadow line with ///M drivers package (except the steering wheel), double glass, full rear curtains, DSP, PDC, RDC, EDC. Sold ;(
Next up: BMW E34 (UK/RHD) ///M5 '95 with S62 fitted and lot's of other mods that is on my EVIL mind but first have to get my hands on the car and sort out the space issues under the bonnet
Many people have it and the general consensus from that thread is that it is normal. I have been chasing the issue as well and was told by evolve it could also be a timing or carbon buildup issue. Was looking fwd to seeing if the Evolve tune can help eliminate it.
I have 140,000km and have a new cam chain tensioner.
Just to elaborate further, the sound ONLY happens when you blip/stab the throttle fairly hard from complete Idle. If you blip/stab the throttle from any RPM higher then 1000 it won't do it. Only from a very low (idle) RPM. Same if you ease into the throttle even slightly then suddenly blip it, it hardly happens. Basically it feels like the engine is 1/2 second too slow to adjust timing and you get a brief knock in the cylinders. I suppose I could live with it AS LONG as I could know for sure that it wasn't causing damage to the engine. I think my video is the best example of the sound, I hope Raikku sees it and can offer an opinion. I am going to be getting the car dyno'd soon as well to ensure AFR, health, etc..
Many people have it and the general consensus from that thread is that it is normal. I have been chasing the issue as well and was told by evolve it could also be a timing or carbon buildup issue. Was looking fwd to seeing if the Evolve tune can help eliminate it.
I have 140,000km and have a new cam chain tensioner.
@ OsinO,
Dude it's the exact same sound that mine made and it costed me a new VANOS unit and all components. That will help the OP as weel.
Can you elaborate please? Did they explain what was wrong exactly? I appreciate the input but am not automatically convinced its my Vanos because replacing it got rid of the sound for you. Perhaps it's a timing issue which I think gets done when Vanos is replaced?
Can you elaborate please? Did they explain what was wrong exactly? I appreciate the input but am not automatically convinced its my Vanos because replacing it got rid of the sound for you. Perhaps it's a timing issue which I think gets done when Vanos is replaced?
OsinO,
Timing is directly related to VANOS and as you might know it's a pretty sensetive and painfull part of the S62. I've droven the car 10000 more km's after the VANOS and it's components change and had some track time on her also, no rattle/sound absolutely. And my engine is the older one which has even more problems than the '03. I've sold the car something about 5 months ago to my friend and he sais there is absolut no rattle/sound at all. Just for the regular sound coming from the VANOS, there is ofcourse no meaning to change it, I'm also not saying that you change it, but you should absolutely get it looked at and and check the compression on your cylnders, have yoor VANOS and it's components checked and all the timing chains plus the tensioners checked. That way atleast you'll get a idea what is wrong or what will be wrong in the near future. How many miles do you have on her?
I'm really glad that I can help you and maybe others out, as I've expirienced the exact same rattle/sound and problems that you are facing.
Btw, do you have any problems with idle after stabing the throttle on lower RPM's?
So your mechanics didn't realise that the Vanos was faulty, before they took on the job of rebuilding your whole engine ?...
Then they tell you : "By the way we didn't realise, but both your Vanos units need to be replaced....Sir"
Vanos units are essentially a gearbox with metal gears...It doesn't break very often (as M Gmbh told you themselves )
Also for your information, my 1999 M5 is nearly at 250,000KM with original Vanos and Piston Rings. No major issues really, and balanced compression numbers throughout. Drinks a bit of oil, but that's about it.....touch wood.
PS : If the new owner of your car encounters any problems with it, please make sure he doesn't send it to your mechanics, but rather ask people on this forum about the issue first ! We know MUCH MUCH more about your old car, than your mechanics do !
9Likes
but first have to get my hands on the car and sort out the space issues under the bonnet
)
Linear Mode
