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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > NA Engine (non-turbo) / Drivetrain / Exhaust Modifications > HELP!!! My belt broke & now the car won't start!!



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      08-31-2013, 08:36 AM   #1
E90MYKE
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HELP!!! My belt broke & now the car won't start!!

At least my car is only a couple blocks from my house....BUT>>>
The belt broke. I replace the belt, but the car still will not start...

Any ideas????
Thanks
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      08-31-2013, 10:28 AM   #2
McAuley7
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Lol uhh how many miles 75k+?dont know much but sounds like what they told me is gonna happen to my car if i dont change the idler pulley
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      08-31-2013, 11:36 AM   #3
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No help here but keep us posted.
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      08-31-2013, 12:46 PM   #4
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Need more info. Does it crank?
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      09-01-2013, 08:25 AM   #5
E90MYKE
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It sounds like it wants to start but it just won't turn over. I tried to jump it thinking the battery was long but it still didn't start. It was just a very long crank and never started.
I don't see any broken wires or connections from the belt breaking.
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      09-01-2013, 08:29 AM   #6
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I have 105k. I replaced the tensioner pulley last year. I need to replace the VCG so I think a little oil was on a pulley and the belt slipped off.
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      09-01-2013, 03:13 PM   #7
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It's a long shot but it could be totally unrelated to the belt breaking. Sounds like a crank/cam sensor issue. The belt could've contacted a cam sensor and shown no external signs of damaged. You need the codes read.
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      09-01-2013, 04:07 PM   #8
E90MYKE
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I have 105k. I replaced the tensioner pulley last year. I need to replace the VCG so I think a little oil was on a pulley and the belt slipped off.
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      09-01-2013, 04:08 PM   #9
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Thanks 5k.
From what I'm seeing and reading I'm leaning toward that. Is it an easy DIY? I've seen some post say you have to get it from the bottom?
Unfortunately I don't have a code reader. That should be my next investment.
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      09-03-2013, 09:31 PM   #10
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It isn't difficult, you should only have to remove the air scoop to get to it. Be ready to catch the bolt because it can be a pain to get it back if it falls to the splash guard. If you don't buy a code reader get it to an indy to get their opinion, throwing parts at a BMW gets expensive quick. If you're not bad with computers I highly recommend getting familiar with BMW Standard Tools, all you would need is a $35 cable. Check out the coding forum for more info.
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      09-04-2013, 04:47 PM   #11
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So I got it to an indy shop. They called and said they will need to do a compression test. ($190)
I charged the battery for awhile before the tow truck came yesterday, and it actually sounded better and I thought it might start.

Hopefully it doesn't turn out too bad.

It was actually running well before the belt broke.
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      09-04-2013, 05:07 PM   #12
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nate5ks is on the right track. The cam and crank sensors/wiring are right there where the belt is routed. Check those out and report back
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      09-04-2013, 06:08 PM   #13
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Ask the Indy what codes were read, I'm surprised they came back and said they need to do a compression test.
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      09-04-2013, 08:57 PM   #14
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I'm just throwing this out there. Are you sure the belt is routed correctly? I'd have the shop remove the belt and see if the car will start.
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      09-05-2013, 10:54 AM   #15
E90MYKE
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I was a little suprised when they said they needed to do a compression test. Can't really figure out why that was the first thing they said other than it'll cost me $190.

I'm pretty sure the belt is routed correctly. I've replaced the belt before when I replaced the tension pulley.

At this point I just hope it doesn't cost me too much and I can hurry up and get my car back. I'll make sure I able to read the codes myself next time.

The belt breaking shouldn't have caused anything internal to happen resulting in something expensive and actually needing a compression test, or could it? I hope it's the sensor just keeping it from starting.

As soon as I hear something from the shop I'll post it.
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      09-05-2013, 10:57 AM   #16
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It would be nice for it to be something as simple as the belt being routed wrong. I'm keeping my fingers crossed for something very simple.
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      09-05-2013, 11:04 AM   #17
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I'm far from a mechanic, but so far with the help of this forum I've been able to:
* replace the starter
* replace the rear window regulator
* replace tension pulley
* replace serpentine belt
* replace front brake pads, pad sensor, and rotors
* replace ignition coil
(all over a few years time)
If I had a little more time I'm sure I probably could have gotten this resolved with the forums help without having to put it in the shop.
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      09-05-2013, 11:32 AM   #18
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Check your fuses... It does not hurt. Keep us posted.
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      09-05-2013, 09:20 PM   #19
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Did you ask the shop what fault codes were stored?
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      09-09-2013, 11:34 AM   #20
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they mention there were a few codes that came up. I think one of them was cam something. I don't know the actual code, but I do remember hearing cam something when they were telling me the codes.

I have to call them back again later this afternoon because I need my car back now. I'm not sure if they actually did the $190 compression test they mentioned, but I spoke to someone on Saturday because the tech working on the car wasn't there and they cleaned the spark plugs and did a $93 oil change. Non of which is the reason the car won't come on. I probably was due for an oil change, but that's the same oil that was in the car when it was running before the belt broke. Not sure if the spark plugs needed to be cleaned, but those are the same spark plugs that where in the car when it was running before the belt broke. So nothing they have done so far has anything to do with the car not starting.

It's probably just the cam position sensor, but they don't make much money just changing that. So I'm probably $500 in now and they haven't addressed the problem.
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      09-09-2013, 12:45 PM   #21
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Would a broken Crank Case Vent Hose cause a loss of compression? It seems like it would. I spoke to the shop on the phone again and they are still saying there is no compression. I had someone replace the Crank Case Vent Hose and I'm wondering if it wasn't done correctly.
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      09-09-2013, 11:01 PM   #22
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no, it wont cause a loss of compression. if the compression was low im assuming the valvetronic failed since it controls the lift of the valves. If it fails in a high lift position it can cause low compression. Maybe you knocked the connector off of the vanos valve it is very close to the belt although that is unrelated to the compression. How far did you drive with the broken belt? Ive seen low voltage do strange things to cars.

Last edited by allanawe; 09-09-2013 at 11:08 PM.
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