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  1. #1
    Mrs.Smith
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    2006 M3 convertible timing chain shot through engi

    O.K. Hoping an M3 enthusiast will read this and have an idea of why this would have happened. Driving my M3 the other day, smoke starts coming out of the engine. I was close to home so pulled in the drive open the hood only to my horror to see that there was a 5" piece of metal that had cracked off my engine block and was now exposing my engine. The smoke had come from the belt spewing out oil as it turned and had hit the hot engine and smoked. The oil temp was reading normal at the time and it oviously stopped smoking when turned off..that wasn't the issue here.
    Had it towed to BMW, diagnostics reading $300.00 cha ching read that the timing belt had blown through the engine..needs brand new engine they said. $18,900.00 2006 M3 only 52,000 miles just out of warranty although they said they have never seen anything like this before and wouldn't have been covered by thw warranty anyway. For God's sake, could have been killed if this had happened on the freeway. You don't expect a car of this value to have something fly through your engine casings when you are driving home in a low gear. Does anyone have any ideas as to why this happened, could something have flown up and hit the engine without me realising? and as of now I told them I can not afford that and they said they are looking in to how they can help..not sure if they even will. Is this an insurance thing...what to do? I have pics I will try and post them. Thanks in advance.


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    That blows

    First, you should post this on the E46 board (this completely dead forum is for the E9x M3.)

    There were lots of S54 engine failures but those were generally 01-02 model years and there was an extensive recall (twice) to address the issue (rod bearings.) Regardless, your year wouldn't have been covered. Engines unfortunately fail, stinks when it happens to you. Won't be covered by insurance, either.

    The price they quoted you was a parts catalog crate engine. You could easily buy a whole E46 with similar mileage for that price (earlier model year than yours.) You should be able to find a rebuilt / spare S54 around for a lot less than that.

    Hopefully BMW won't leave you hanging 2k miles out of warranty. Put a call into BMWNA if you haven't done so already.<img src="http://farm2.static.flickr.com/1267/4702362918_a62003535e_b.jpg">

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    slow down buddy, this is not the end of the

    engine. By looking at the picture, its either the head or the top of the block... can not see the picture as its huge in size.

    Either way you need a rebuilt head or a new block. none will cost you the $18,990 and not even close.

    The worst it will be 2000usd but if you take it to a BMW mechanic instead of the stealer then you will get it cheaper.

    it is a weird thing, nothing no force could do it from the outside. It is a manufacturing error.

    Here is what I would do. Have the head or block removed and sent to a metal-x-ray to see if this is in fact a manufacturing error. I bet it is. There has to be a dirt or something in the metal which caused it to crack after a while. The external force is not possible while in the car. Both the block and head is really strong none of them could be cracked so easily. Back in the 80's we used fix chipped off motor mount or corner pieces with JB weld. They held up pretty good but I would not do it to a M3 engine.

    I would definitely not deal with a local dealer but BMWNA directly if the dealer only suggested a new engine and not any other solutions.

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    Re: 2006 M3 convertible timing chain shot through engi

    If you have a good relationship with your dealer, work with them and BMW. Mind you I have a great dealer, but I just had a main seal oil leak covered by BMW on a 10/2001 build 2002 E46 M3 with 94,000 miles. If you are just out of warranty you have a pretty good case.

    At 52,000 things shouldn't be flying apart. Remain calm and insistent and ask to sit down with the BMW Rep if it seems that your dealer isn't going to be helpful enough. If you become adversarial human nature says you will get nothing.

    Since they say they will work with you , ask them what that means so you can decide if you are going to have them do the work. If BMW is covering some or all of the repair the dealer stands to make a lot of money-- hense they will want to keep the job to themselves.

    Remember it may take some time to get this straightened out but the car is worth it.

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    Blown engine

    Quote Originally Posted by lezonebay View Post
    engine. By looking at the picture, its either the head or the top of the block... can not see the picture as its huge in size.

    Either way you need a rebuilt head or a new block. none will cost you the $18,990 and not even close.

    The worst it will be 2000usd but if you take it to a BMW mechanic instead of the stealer then you will get it cheaper.

    it is a weird thing, nothing no force could do it from the outside. It is a manufacturing error.

    Here is what I would do. Have the head or block removed and sent to a metal-x-ray to see if this is in fact a manufacturing error. I bet it is. There has to be a dirt or something in the metal which caused it to crack after a while. The external force is not possible while in the car. Both the block and head is really strong none of them could be cracked so easily. Back in the 80's we used fix chipped off motor mount or corner pieces with JB weld. They held up pretty good but I would not do it to a M3 engine.

    I would definitely not deal with a local dealer but BMWNA directly if the dealer only suggested a new engine and not any other solutions.
    If the timing chain was loose enough to skip teeth then there could have been piston/valve contact, which would mean an engine replacement or rebuild. Head definitely needs to be replaced.

    That being said, as others a have said you need to get the dealer to be your advocate and go to the regional BMW rep. They should be able to pull codes to see it wasn't an overrev issue. Hopefully, you have treated yor service people right! (this is where the bottle of wine at Christmas pays off)
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