Scary rod bearing thread s85

[VCMpower]

Engine out.

[///M Power-Belgium]

Originally Posted by VCMpower

Engine out.

WOW,ok i see...(very cool pic)
If i may ask, about this strange (bang sound) about 1 second with the startup ,do you still have this ,? after the bearing change......?
Actualy i have this(strange sound) when the car sits in my garage after 3-4 day's,but when i start the car daily,no strange sound

[VCMpower]

I did not change bearings for a worn or failed reason. Did them just because I was there. I have not experienced that start up noise that some have had. Mike Benvo(BPM) I believe has heard this and was trying to get it sorted. Maybe PM him. My car makes so much noise on cold start I would not hear much

Originally Posted by ///M Power-Belgium

WOW,ok i see...(very cool pic)
If i may ask, about this strange (bang sound) about 1 second with the startup ,do you still have this ,? after the bearing change......?
Actualy i have this(strange sound) when the car sits in my garage after 3-4 day's,but when i start the car daily,no strange sound

[///M Power-Belgium]

Originally Posted by VCMpower

I did not change bearings for a worn or failed reason. Did them just because I was there. I have not experienced that start up noise that some have had. Mike Benvo(BPM) I believe has heard this and was trying to get it sorted. Maybe PM him. My car makes so much noise on cold start I would not hear much

Ok...i see,thanks man !
BTW...this is the...bang (clack) ...start up sound that many of us hear with a cold start v v v
This is a video from another member of this forum ,i have this clack sound too...but not so loud,maybe 50 % of it !

[VCMpower]

That does sound valve train related and coincides with rpm drop I see. Your garage emphasizes that noise no doubt. It is a special procedure to set the timing chain on the S65 to eliminate all possible slack. I could see this varying car to car.

Originally Posted by ///M Power-Belgium

Ok...i see,thanks man !
BTW...this is the...bang (clack) ...start up sound that many of us hear with a cold start v v v

[///M Power-Belgium]

Originally Posted by VCMpower

That does sound valve train related and coincides with rpm drop I see. Your garage emphasizes that noise no doubt. It is a special procedure to set the timing chain on the S65 to eliminate all possible slack. I could see this varying car to car.

Again thanks,will talk with my BMW dealer about it !

[VCMpower]

Welcome. Should not be difficult to track that down.

Originally Posted by ///M Power-Belgium

Again thanks,will talk with my BMW dealer about it !

[Longwong]

Originally Posted by VCMpower

No oil burning here either. Even after doing my motor build. I believe oil consumption is related to break in procedure. You must have done it well

actually followed break-in for 200 miles and than could not help myself. By 500 miles I was hitting redline and above 700 I was driving like I stole it.

So yes I believe I gave it a good break in!

[VCMpower]

Highway runs? Or all city?

Originally Posted by Longwong

actually followed break-in for 200 miles and than could not help myself. By 500 miles I was hitting redline and above 700 I was driving like I stole it.

So yes I believe I gave it a good break in!

[BPMSport]

Originally Posted by VCMpower

Welcome. Should not be difficult to track that down.

That one sounds much louder than it is on 90% of cars I've heard.

The dealer replaced my vanos check valves and the noise got slightly louder.

I think it's normal for a car sitting that long.

[aussiem3]

Originally Posted by ///M Power-Belgium

Ok...i see,thanks man !
BTW...this is the...bang (clack) ...start up sound that many of us hear with a cold start v v v

Hi
Mine was as loud as that ...if the car has been left parked for too long .... may be a week and when you start it, you hear it. Dealer checked it out and raised a PUMA and BMW said it is normal for age and mileage of the car. It's the oil pressure dropping inside the vanos and check valve related. Nothing to worry.

But one thing ... since I got Mike's tune, I haven't experienced it. I think Mike's tune does make some changes to the vanos parameters and may be it has taken care of it. It's definitely check valve related inside the vanos.

It's perfectly normal according to BMW.

I also saw you had 24 miles in the range. I had the same and had the car parked for a couple of days and when I started, BOOM, I got engine malfunction and all sorts of error codes. The fuel tank had expanded and excessive air was forced in thru the fuel lines. Filled up the tank, cleared the errors and has been good since. So be careful with leaving the car empty if you're going to store the car, Ask Mr Benvo.

[BPMSport]

Originally Posted by aussiem3

Hi
Mine was as loud as that ...if the car has been left parked for too long .... may be a week and when you start it, you hear it. Dealer checked it out and raised a PUMA and BMW said it is normal for age and mileage of the car. It's the oil pressure dropping inside the vanos and check valve related. Nothing to worry.

But one thing ... since I got Mike's tune, I haven't experienced it. I think Mike's tune does make some changes to the vanos parameters and may be it has taken care of it. It's definitely check valve related inside the vanos.

It's perfectly normal according to BMW.

I also saw you had 24 miles in the range. I had the same and had the car parked for a couple of days and when I started, BOOM, I got engine malfunction and all sorts of error codes. The fuel tank had expanded and excessive air was forced in thru the fuel lines. Filled up the tank, cleared the errors and has been good since. So be careful with leaving the car empty if you're going to store the car, Ask Mr Benvo.

Usually if you store the car you want to have the tank completely full, and add stabilizer if it's going to be a really extended period. Also not good to run it low to begin with, even with daily driving. I usually fill mine just below a quarter. Battery tender is good also - remember these cars love to throw tons of faults with low voltage.

Now to update the story I mentioned before about my friend with the 2011 M3 - the car is at the dealership getting the motor dismantled. We're pretty sure that it's the con rod bearings based on the sound. I asked him to take pictures once it's fully disassembled and will post them once they are sent to me.

[Krozi]

I would just do a big ol nasty burnout.

[Cidle]

Originally Posted by Krozi

I would just do a big ol nasty burnout.

Sounds like a supercharger clutch........

[Longwong]

VCM-Mine was some city, mostly freeway stretches. Most of my miles are highway, freeway. Not a lot of stop and go

[///M Power-Belgium]

Originally Posted by Longwong

VCM-Mine was some city, mostly freeway stretches. Most of my miles are highway, freeway. Not a lot of stop and go

Best thing for a break in

[VCMpower]

Originally Posted by ///M Power-Belgium

Best thing for a break in

Yep.

[mtbkr31]

Just got my results back from Blackstone.
This sample was after the oil was changed with new coated VAC bearings, ARP bolts, upgraded supercharger install, over 20+ dyno runs to track down a boost leak, and 1.5k miles.

Originally Posted by mtbkr31

On page 7 (Engine-4: Stock internals, supercharged, Mileage: 72,000), that is my engine. I replaced the bearings with the VAC coated units. Active Auto did all the work and they measured the VAC coated units with OEM stock units...the clearance was the same.

I swapped out the bearings since I upgraded the supercharger to their newest level.

Some caveats:
-I change my oil every 3-5k miles
-Let the engine warm up where the oil temp is at 210; never pass 3k rpm until then
-Used the OEM Castrol until a 1.5 years when Active switched over to Redline
-Currently per Active's recommendation I'm using Mobil Race Oil 0W50 (ran for once cycle already...sent in my sample to Blackstone)

Quite literally, after the new VAC bearings went in the car, she's had over 20-25 dyno runs to track down a boost issue. So it will be interesting to see the results from Blackstone.

In as far as Active's new supercharger...holy crap it's FAST. Very happy with the upgrade from the HKS unit. Also, I notice that my oil temps don't go as high in the past when I had the HKS unit when on long drives (i.e. 50+ miles highway in 90+ degree). I attribute that to the larger intercooler and Rotrex supercharger not having to push as much as the HKS unit to make the equivalent power.

[kawasaki00]

The 0w50 is a fantastic oil. The reason I dont bring it up is you need to be catless and be prepared to replace o2 sensors much quicker than normal. Although for most if the car has a supercharger on it they are not worried about a couple hundred bucks for sensors.

[mtbkr31]

Thanks Kawasaki00...

I'm running 100 cell HFCs...I'll see how the O2 sensors hold up. I'll post my next sample with Blackstone on my next oil change.

Originally Posted by kawasaki00

The 0w50 is a fantastic oil. The reason I dont bring it up is you need to be catless and be prepared to replace o2 sensors much quicker than normal. Although for most if the car has a supercharger on it they are not worried about a couple hundred bucks for sensors.

[Longwong]

why does the 0w 50 oil cause 02 sensors to go?

[kawasaki00]

Originally Posted by Longwong

why does the 0w 50 oil cause 02 sensors to go?

Because the 0w-50 that he is talking about is a racing only oil. It has over twice the zinc around 1850ppm I believe. That much zinc will burn coverters up and leave deposits on o2 sensors that skew the data. Kind of like running leaded fuel, but it just doesnt happen as fast.