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  • S50 m coupe

    Hi, test drove a s50 m coupe this weekend, found there wasn't much mid range power, but it did pull hard at the top end of the rev range, on tick over they didn't seem to be as smooth as a modern car with an occasional hunt, a bit lumpy. I was just wondering if this is a feature of the car or a symptom of something like vanos?

    If anyone has an s50 m coupe perhaps you could confirm as pretty normal or something else. Many thanks Dave

  • #2
    Has the car had any work done to the Vanos? If not then I suggest you factor in some work from Mr Vanos in the future.

    The other common issues related to lumpy idle are relatively cheap and easy to put right.

    If you can get to see another forum members car then that will help you make an informed opinion on whether what you heard/experienced were common traits or not.

    Where are you located?

    Comment


    • #3
      thanks

      thanks for reply i havnt bought the car yet, am basically thinking about it, but this was a symptom that sort of put me off, its alot of money for a car with issues but they are old so maybe they all will especially at the entry level!!

      Is the s50 a motor a fragile one? the car has covered 95,000 mile. no history of rebuild or vanos work, im based in nottingham, thanks dave

      Comment


      • #4
        As Big02 suggested if you gave your location then maybe you have a Forum member nearby who could let see/try their car to see how it compares with the car you've driven. I've done that for potential owners in the past.
        My car doesn't have any of the symptoms you have noted. I'm sure there are more mechanically informed members who will come forward with suggestions, it could be Vanos, plugs, plug leads, a duff coil pack etc. You need to drive a few examples to be able to get a comparison.
        Pete C

        2000 Z3M Coupe - Cosmos Black Metallic/Black interior. 805 of 821 RHD built

        Previous BMWs

        2003 E46 M3 6 speed manual - Carbon Black/Black interior.
        2000 Z3M Coupe - Cosmos Black Metallic/Black interior. 692 of 821 RHD built
        1986 M635
        1985 E28 M5
        1983 E28 528i Alpina

        Comment


        • #5
          The nature of the engine is top end power, so sometimes the mid range can feel a little lacking compared to many modern turbo cars, inc turbo diesels!

          Comment


          • #6
            If it has niggles you're unsure of, maybe suggest you're interested IF they sort them. Could be anything from a 20+ year old breather hose that needs replacing, or the Vanos solenoids need attention or the full Vanos service/swap. Have somebody run diagnostics on it perhaps, that may provide a guide as to what's behind it.

            S50 is a great engine. I've had to have the Vanos solenoids on mine re-soldered. It's pretty common for them to need a bit of bridging solder
            Last edited by Fat Tony; 27-08-2019, 04:26 PM.
            Not actually in the least bit fat

            2000 S50 Titanium Silver / Black
            ACS Suspension, Exhaust & Type III Wheels
            Simota carbon air intake | Strong Strut Front Brace

            Comment


            • #7
              soldering solenoids

              Hi Tony, I bought the car, for the most part a good service sorted it out, it does go well, but the lumpy tickover turned into cutting out if you turn the car off and on at say a petrol station. It will cut out for a few junctions, maybe 1-2 minutes after re fire. My first port of call will be idle control, breathers, poss ICV, and then im into soldering the solenoids.

              My question is, is this a DIY or a specialist type job, I have looked at the vanos rebuild thread, does the solenoid have to be replaced at certain depth in casing and how does it detach for removal, its just not very clear on the rebuild thread. Many thanks Dave

              Comment


              • #8
                Originally posted by the badger View Post
                Hi Tony, I bought the car, for the most part a good service sorted it out, it does go well, but the lumpy tickover turned into cutting out if you turn the car off and on at say a petrol station. It will cut out for a few junctions, maybe 1-2 minutes after re fire. My first port of call will be idle control, breathers, poss ICV, and then im into soldering the solenoids.

                My question is, is this a DIY or a specialist type job, I have looked at the vanos rebuild thread, does the solenoid have to be replaced at certain depth in casing and how does it detach for removal, its just not very clear on the rebuild thread. Many thanks Dave

                Replacing vacuum hoses and ICV is diy but vanos removal and repair (other than soldering of joints) is best left to the pro's in my opinion.

                worth a read,

                http://www.beisansystems.com/procedu..._procedure.htm

                Comment


                • #9
                  Originally posted by the badger View Post
                  Hi Tony, I bought the car
                  Congratulations
                  Not actually in the least bit fat

                  2000 S50 Titanium Silver / Black
                  ACS Suspension, Exhaust & Type III Wheels
                  Simota carbon air intake | Strong Strut Front Brace

                  Comment

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