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Discussion Starter #1
Hello, new member here from Holland. So sorry if my english is not so real good. 4 months ago ik bought my dreamcar the E63 M6 2005 mint condition 1 owner before me. Had a lot of problems with te car butt I fixed al. Now I have a major problem I think when I bought te car at a BMW specialist the car had 130.000 km at the clock. So I let them change the rod bearings en the hp vanos line. The car has now 140.000 km and iT looks like the engine has spun a bearing. Loud ticking noise from the engine ticking wil increase when you rev. Is iT normal that after only 10.000 km the engine spun a bearing??
 

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Rod Bearing failure after replacement

Unfortunately doing the rod bearings is a job were a small mistake can go unnoticed and cause a catastrophic failure. One example is if you nick the crank shaft with a rod or rod bolt. The bearing will fail quickly. There are other things that can cause a bearing failure after replacement. It really pays to have the highest quality engine mechanic replace the rod bearings. Sorry


Sanman
 

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Discussion Starter #3
When the bearings are replaced by a good mechanic with the right skills is this then possible that a bearing spun in 10.000 km? I need a lot off info we are talking about a engine replacement off 10/15k euro. A BMW specialist did the bearings so I have a warenty on the repair. When they dont want to pay i take this case to court.
 

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Hey, your English is pretty good, certainly better than my Dutch!

Oh man I love these cars but I hate these stories... I have a 2007 M6 convertible 6sp with only 71500km and a while back when I was doing an oil change I found some non ferrous metal flakes in my oil and filter, so I parked it until I had time to do the job... I have my bearing replacement kit from FAMS and plan to do the replacement when I get the nerve/ the weather warms up (-14 in Ontario Canada this morning).

Anyhow, with that, I'm certainly not an authority on engines but I believe a spun rod bearing would manifest itself as a knock as opposed to a tick and I expect your engine wouldn't run more than a few minutes before you had catastrophic failure (perhaps an engine guru will chime in and support or correct me).

Some things to consider...

You said loud ticking noise and while ticks can come from everything from exhaust gasket, vanos actuator, injector or even a broken valvespring, depending on where the noise is coming from, if from near the balancer I'd consider the HP Vanos pump.

Pre Dec 2005 s85 engines had issues with the HP Vanos pump gear tooth profile. An updated gear is recommended when one inevitably replaces the rod bearings or otherwise has the pan off but I have no idea what failure of that component would sound like. However, do you know if your mechanic took the HP Vanos pump off to replace the HP oil line because if he did the gear lash adjustment is very precise and if done incorrectly I'd expect that gear could wear out quickly with the low profile tooth design of the old gear and meshing of the gears wasn't perfect. (www.fastattackmotorsports.com/s85-vanos-high-pressure-pump-drive-gear-update-kit )

There was a video floating around a couple years ago where there was a horrifying "tick" (more like a loud snapping sound) coming from the very front of one s85 engine near the balancer on that turned out to be the outer race of the Vanos pump being cracked requiring that the pump be replaced. (I tried to find the video for you but no luck)

Vanos ticks will emanates from the black covers on the front of both banks of cylinders and can indicate low vanos oil pressure, blocked/restricted vanos lines/screens or worn vanos actuators but I dont think it gets too loud.

If it were me I certainly wouldn't be running the engine until you inspect the oil and filter for metal fragments and would want an oil analysis done as well. I'm sure someone with way more knowledge will chime in. There are a lot of really helpful experienced people in this community.

These cars are simply amazing when they're happy and downright depressing when they're not.

Best of luck.

Sent from my LG-M703 using Tapatalk
 

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Hello, new member here from Holland. So sorry if my english is not so real good. 4 months ago ik bought my dreamcar the E63 M6 2005 mint condition 1 owner before me. Had a lot of problems with te car butt I fixed al. Now I have a major problem I think when I bought te car at a BMW specialist the car had 130.000 km at the clock. So I let them change the rod bearings en the hp vanos line. The car has now 140.000 km and iT looks like the engine has spun a bearing. Loud ticking noise from the engine ticking wil increase when you rev. Is iT normal that after only 10.000 km the engine spun a bearing??
Post a video showing how it sounds.
 

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Discussion Starter #6
I dont drive iT or wont start the car, my local shop say rodbearings and this Guy rebuild the V10 by hand. The problem is when I bought the car I let the bearings do at the bmw specialist but now big problems. Ik have the car now 4 months and I invest already 8k in all doet of problems. If iT is a bearing failure I Will take iT back to the shop who replaced te bearings and claim the warranty on the repair. I posted a short video on YouTube https://youtu.be/NrgBkaPpPMY
 

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I dont drive iT or wont start the car, my local shop say rodbearings and this Guy rebuild the V10 by hand. The problem is when I bought the car I let the bearings do at the bmw specialist but now big problems. Ik have the car now 4 months and I invest already 8k in all doet of problems. If iT is a bearing failure I Will take iT back to the shop who replaced te bearings and claim the warranty on the repair. I posted a short video on YouTube https://youtu.be/NrgBkaPpPMY
Hm that sounds worrisome and I suppose it could be a spun bearing but the Vanos sounds pretty noisy too. From memory which I realize is unreliable, that knocking is reminiscent of the noise I recall from that video I saw so if I can find it I'll post it here. Hopefully you've caught it before too much damage is done.

Please do post back once you know more from your mechanic, I'm curious as to what they find and the more information, clips and pics the forum has the better armed people are when they encounter troubles.

Again good luck.

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Discussion Starter #8
My mechanic said, the vanos had a dieselknock but thats not a very big deal al off the pre face lift has that diesel sound. The engine whas super strong put out almost 530 hp with only eventuri intake and secondary kats removed. And now this **** im very sick off this, iT whas my dream car its become a True nightmare..
 

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My mechanic said, the vanos had a dieselknock but thats not a very big deal al off the pre face lift has that diesel sound. The engine whas super strong put out almost 530 hp with only eventuri intake and secondary kats removed. And now this **** im very sick off this, iT whas my dream car its become a True nightmare..
I found a video of a car making the same noise as yours. It wasn't rod knock, it was the vanos high pressure line: https://www.youtube.com/watch?v=H0YN0vAQRD4
 

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Discussion Starter #11
That vanos ticking is both banks I think if its the high pressure line? Mine M6 has only a ticking sound from left side off the engine. And I did oem bearings
 

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Discussion Starter #13
I let them replaced at a BMW specialist. Butt good news toninght I went to them and the gonna repair everything without any cost. No matter what the problem is, even if the engine need to be replaced no cost for me in that case. I bought the car to at that company 4 months ago without a warrenty so very good service!
 

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Discussion Starter #17
Thanks Jim, im glad that they gonna fix the problem. I think its off a bearing off the vanos. But the first thing in mind is a spun bearing. I was afraid that the engine maybe Will blow thats why I make a quick clip a idle. The sound was horrible and so loud i heard iT in de car with the Windows closed and the radio on.
 

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I'd say pull the filter and look for glitter, but you already handling it, so - let us know.
 

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MPower81, I know it's only been a month but did you get some answers to your problem? If so would you mind sharing?

Thanks

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Discussion Starter #20
Still no idea off what is the problem, the shop take the engine out off the car. Removed the oil pan and what do you think everything looks fine. So no spun bearing, now they are gonna lift the valve covers and inspect the heads.
 
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