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E60 (2004 - 2010)
BMW 5-Series (E60 chassis) was first seen in the Unites States in the fall of 2003 with a 2004 Model Year designation. The E60 is now available as a 528i, 528xi, 535i, 535xi, 550i and a 535xi sports wagon! -- View the E60 Wiki

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  #1  
Old 07-19-2013, 05:18 PM
Hansfrans63 Hansfrans63 is offline
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BMW dealer telling me broken serpentine belt debris in engine?

My serpentine belt broke on my 2006 525i about a block from my house, so I was able to drive the car to my driveway, no problem. Opened the hood and there were pieces of belt laying on the bottom of the cover under my car. I cleaned out the pieces of belt that I could reach. Went to Advanced Auto and got a new belt and put it on, no problem. Started the car let it run a few minutes to make sure there were no issues with the belt, no problem. Drove the car about 3 miles and the Low Oil Pressure: Stop Engine light came on and the engine shut down maybe 20 seconds later. Had the car towed to BMW dealer and they are telling me pieces of the broken serpentine belt are inside my engine and it's going to need to have the engine replaced for $10,000 or $4,100 to clean it out and they can't guarantee that will fix it. How is it even possible for pieces of the belt to get inside the engine? My car was leaking oil from somewhere, after the belt broke and there was oil on the engine. Maybe the belt cut a hose when it broke? I did not see any noticeable broken hoses when I changed the serpentine belt. The car has 130,000 miles on it. Any advise would be greatly appreciated.

They did tell me they would give me $1,000 towards a trade in! LOL!
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  #2  
Old 07-19-2013, 06:27 PM
dkotanto dkotanto is offline
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BMW dealer telling me broken serpentine belt debris in engine?

Can they explain how the broken belt pieces made it inside the engine? Where was the oil leak at? Was the oil filler cap accidentally left open? Any intake mods?


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  #3  
Old 07-19-2013, 07:10 PM
Hansfrans63 Hansfrans63 is offline
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No, they did not tell me how the pieces made it into the engine. They called me to approve 3 hours of labor to do an oil leak check, but they never did tell me if there was even a leak. No, the oil cap was never left open and there have been no intake mods.
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  #4  
Old 07-19-2013, 07:41 PM
l1tech l1tech is offline
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I wonder if the old serpentine belt got tangled up behind the front crankshaft pulley and damaged the seal which caused a big oil leak adn therefore all of your problems.
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  #5  
Old 07-19-2013, 09:42 PM
H F H F is offline
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I had a very similar situation , and I think I know how that could of happened. After changing my alternator somehow both my belts shredded apart . The steel strands winded tight around my water pump shaft and burned the seal and got past the bearing . Lost all my water on the freeway. So it's possible the same thing happened in your case . Except that the steel strands winded around ur crankshaft and wasted ur seal possibly passed the bearing into the bottom end.
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  #6  
Old 07-20-2013, 04:45 AM
bmwoem1 bmwoem1 is offline
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BMW dealer telling me broken serpentine belt debris in engine?

This is actually a common problem ( I'm a tech). When the belt starts to shred it wraps tightly behind the front crankshaft pulley. The shredded belt eventually makes its way into the engine through the front main seal and gets sucked up through the oil pickup tube. If you didn't drive it long like this, your engine is most likely ok. You will have to remove the oil pan Bd clean out all the debris


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  #7  
Old 07-20-2013, 04:45 AM
Hansfrans63 Hansfrans63 is offline
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Thank you all for the replies. I am heading the dealership today to look at it for myself.
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  #8  
Old 07-20-2013, 04:47 AM
bmwoem1 bmwoem1 is offline
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BMW dealer telling me broken serpentine belt debris in engine?

The belt shreds because of oil contamination, usually due to leaking oil filter housing gaskets


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  #9  
Old 07-31-2013, 01:55 PM
Image2Pixel Image2Pixel is offline
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CPO Warranty coverage?

Assuming the vehicle is current with maintenance and still under the CPO warranty, would this be covered?
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  #10  
Old 07-31-2013, 08:00 PM
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TLO03 TLO03 is offline
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I've see it happen mostly on n54 cars. I had more pics can't find them..
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  #11  
Old 07-31-2013, 08:09 PM
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booyaazaa booyaazaa is offline
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Quote:
Originally Posted by TLO03 View Post
I've see it happen mostly on n54 cars. I had more pics can't find them..
Damn that definitely looks like a mess.
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  #12  
Old 03-20-2014, 11:43 AM
joseywales joseywales is offline
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The same thing happened to me on the 91 freeway with a 2008 528. This took all but ten seconds for the battery light to go on, a noise from the belt clunking around, and the engine to stall. When we got the car home, I had to google how to unlock the gearbox out of drive and roll the car down the ramp( you pop the lid, twist the key underneath, and then shift the lever down with a screwdriver). I took it to the closest mechanic, and the battery had power, but the engine spun around. He took it to foreign specialist, who said th belt got into the engine, and he needs to replace it for $8500. Since I don't know the other guy, how do I know it's not just a $2000 clean out and gasket repair? The second mechanic called my first mechanic and insisted I was driving it a long time with a broken belt.. My wife heard it snap seconds before the engine stalled, so that is not the case My mechanic also said GM has a part to block serpentine belts from getting into the engine, but BMW does not. Anybody have any thoughts. It certsinly looks cheaper to buy my own engine
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  #13  
Old 03-20-2014, 10:51 PM
ilicboris ilicboris is offline
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How is this even possible? I googled this issue and BMW's were the only car this issue came up with and nobody else.
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  #14  
Old 03-21-2014, 06:46 AM
banglenot banglenot is offline
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Quote:
Originally Posted by bmwoem1 View Post
This is actually a common problem ( I'm a tech). When the belt starts to shred it wraps tightly behind the front crankshaft pulley. The shredded belt eventually makes its way into the engine through the front main seal and gets sucked up through the oil pickup tube. If you didn't drive it long like this, your engine is most likely ok. You will have to remove the oil pan Bd clean out all the debris


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In your experience:

--What mileage/time do you recommend changing the belt?

--Is is more likely to be a problem on the I6, or theV8, or both?

--Are there any "watch out" techniques/issues to be careful of when you DIY it?

Thanks!
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  #15  
Old 03-21-2014, 07:54 AM
HPIA4v2 HPIA4v2 is offline
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Crap, on my last oil change on my 535i I notice oil-filter-housing leak, it smears some oil onto the belt. So I thought, that's not good, cause I know rubber and oil just don't mix.
Bought the gaskets already thinking maybe I'll do it when weather gets better, now I may have to do it sooner.

I didn't know broken serpentine belt can cause damage like breking timing belt on interference 4-banger, I've seen my friend Audi 1.8T needing new engine after that. the valve embedded into the piston head, and this looks as bad with sharpnel in the engine?

Last edited by HPIA4v2; 03-21-2014 at 07:56 AM.
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  #16  
Old 03-21-2014, 07:59 AM
bmwoem1 bmwoem1 is offline
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Quote:
Originally Posted by banglenot View Post
In your experience:



--What mileage/time do you recommend changing the belt?



--Is is more likely to be a problem on the I6, or theV8, or both?



--Are there any "watch out" techniques/issues to be careful of when you DIY it?



Thanks!

It's not the belt failing.... It's the oil filter housing gasket that leaks oil into the belt. If seen oil filter housing leaks as early as 25k miles. This problem is only in the I6 engines. The gasket is pretty easy to change


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  #17  
Old 03-21-2014, 08:10 AM
HPIA4v2 HPIA4v2 is offline
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http://realoem.com/bmw/showparts.do?...71&hg=11&fg=30


BMWOEM1, there are two gaskets in there, I know the front one (item 5, facing the radiator) seems easy to get to but the one closer to air filter box (item 4) may not.
Do they both leak or just the one facing the radiator (item 5).

TIA.
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  #18  
Old 03-21-2014, 08:32 AM
bmwoem1 bmwoem1 is offline
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They both leak


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  #19  
Old 03-21-2014, 09:20 AM
banglenot banglenot is offline
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Just added this issue to "So You Just Bought an E60" and gave bmwoem1 credit for it. Thanks. Perhaps it'll help someone else not destroy their engine.
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  #20  
Old 03-21-2014, 07:28 PM
530iAlpineWhite 530iAlpineWhite is offline
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After fixing oil filter housing and valve cover gasket leak is it safe to say clean around the engine with a rag and brake cleaner. Also, would that be the time to change the serpentine belt? Reading this has me concerned since I have had both fixed in the last 18 months


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  #21  
Old 03-22-2014, 08:01 AM
banglenot banglenot is offline
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Quote:
Originally Posted by 530iAlpineWhite View Post
After fixing oil filter housing and valve cover gasket leak is it safe to say clean around the engine with a rag and brake cleaner. Also, would that be the time to change the serpentine belt? Reading this has me concerned since I have had both fixed in the last 18 months


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After reading this, if it clearly leaked oil on the belt, or I felt it on there, I'd replace it. It's a cheap and easy fix.
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Last edited by banglenot; 03-22-2014 at 08:10 AM.
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  #22  
Old 08-02-2014, 12:47 AM
KeithDTN06525xi KeithDTN06525xi is offline
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I decided to begin a new thread in the main lobby.

Last edited by KeithDTN06525xi; 08-02-2014 at 01:01 AM.
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