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    #1

    100 percent lost?

    I will save the long story of my and my love of E30s for you guys. I remember when I saw one for the first time and it was my Grandmothers and I wanted it as my first car.. haha.

    Long story short, I am having some vibrations/rumblings.

    It is mostly around 30-40 mph. It makes no difference in gear. It does seem like it is coming from the center of the car, but it is hard to determine fully. The car was supposed to have a new Guibo as well. (thats the word from the sales add).

    I have already changed the front CAB, LCA, and Sway bar end links. Made it much better.

    The car has B6 HD and Vogtland springs, is there a change that the 'sport' springs are causing this from the rear camber?

    Also worth noting one of my rear tires is wearing really fast, it looks more like feather than camber.

    So, to check a bad prop shaft can I just take a long bar and check for play?

    Also can bad rotors/bearings cause vibrations and tire wear??? I am a little lost here guys, if anyone has any tips for diagnostic let me know.

    I was running 4 General Altimax winter tires, but now I have one cheapo tire until I get this fixed.


    Also another weird issue is that my car is a little difficult to align properly (granted it is Cletus with a laser for my locals) but one day/turn my car will pull to the left and if I cut somewhat deep right it will level out without pulling but if I do it too far then the car pulls to the right? Eventually after warming up (or driving enough) the car wont pull at all and I am happy.

    Those are my issues. Thanks for your time guys! Happy to be r3vving too!
    20% Accurate

    Morty: Well Summer maybe people that create things aren’t concerned with your delicate sensibilities you know? Maybe the species that communicate with each other through a filter of your comfort are less evolved that the ones that just communicate? Maybe your problems are your own to deal with and maybe the public giving a shit about your feelings is a one way ticket to extinction.
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    #2
    Also, I think my radiator is running without a sensor??? The 3 prongs to the passenger side of my rad is not being used? There is also 3 different points that can be connected to it, it is not one plug though, there are 3 different colored wires each with 90 degree ends on them. So can someone post a pic of that sensor or clarify if it is unused?
    20% Accurate

    Morty: Well Summer maybe people that create things aren’t concerned with your delicate sensibilities you know? Maybe the species that communicate with each other through a filter of your comfort are less evolved that the ones that just communicate? Maybe your problems are your own to deal with and maybe the public giving a shit about your feelings is a one way ticket to extinction.

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      #3
      The 3 prong connector on the side of your radiator is for the auxiliary fan. It's only needed if you have working AC.

      The vibrations are hard to track down. It could be your tires are out of balance. It could be a bad center support bearing. To check that, remove the heat shield covers for the exhaust and take a look at it. If it's cracked and worn, that might be the cause. It could be bad front strut mounts.

      Your steering rack might be going.
      AWD > RWD

      Comment

        #4
        Kershaw, thanks for the reply. I am actually not running ac with the belt removed because I plan to remove the whole system.

        I agree... Sadly, I will check into my shaft tonight (pun intended)

        What may signs of a steering rack going bad?


        I am really close to doing my rear subframe bushing, but I saw that condor has solid mounts that also lift the frame so it helps with the camber from lowering the car. Anyone know if that amount is enough to warrant not buying corrections brackets??

        Hmm, I kinda thought about my rack. Is there any way to check it? What happens if it were to just fail or does that not happen?
        What are my choices for racks? (Sorry, I know I should search) But I know there is the standard rack, the sport, but it seems like there are a few others that fit? e36 or e46?
        20% Accurate

        Morty: Well Summer maybe people that create things aren’t concerned with your delicate sensibilities you know? Maybe the species that communicate with each other through a filter of your comfort are less evolved that the ones that just communicate? Maybe your problems are your own to deal with and maybe the public giving a shit about your feelings is a one way ticket to extinction.

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          #5
          racks going from normal to hard randomly or not returning to center are a sign of failure. but that also could be your alignment, if your toe is not set correctly, it wont return to center. it could also be your steering wheel shaft bearings, i lubricate mine with white lithium grease once a year because I'm missing the cover for the lower one in the engine bay and it really starts to bind up and my steering gets really shitty.
          AWD > RWD

          Comment

            #6
            Vibration you describe sounds like csb. Wheel bearings make a groaning sound with pitch varying with speed. My failed racks in the past always leaked a ton of steering fluid. Check your tie rod ends perhaps? They could be worn.

            Sent from my SM-N900V using Tapatalk
            current fleet: '89 325is; '91 325ic; '88 325is; '91 325i

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              #7
              My car made a grumble noise today, I forgot to tighten one of the wheels. But usually when I have those issues you described, it is the tires. Are one of your tires really old or worn?

              Comment

                #8
                I always replace all 4, but yes worn tires do generate a lot of noise. Your uneven wear on one tire could have been due to failed TAB, which you have fixed. But the worn tire was still there. One of the things I love about these cars is how connected you feel with the road. ..seems like you could tell the difference between running over a dime or a nickel. The price we pay is that you also can feel any imperfections in the suspension and tires.

                Sent from my SM-N900V using Tapatalk
                current fleet: '89 325is; '91 325ic; '88 325is; '91 325i

                Comment

                  #9
                  Originally posted by mybimr View Post
                  I always replace all 4, but yes worn tires do generate a lot of noise. Your uneven wear on one tire could have been due to failed TAB, which you have fixed. But the worn tire was still there. One of the things I love about these cars is how connected you feel with the road. ..seems like you could tell the difference between running over a dime or a nickel. The price we pay is that you also can feel any imperfections in the suspension and tires.

                  Sent from my SM-N900V using Tapatalk

                  The rear trailing arm bushing has not been changed... I have had a set of weaves with worn tires (felt so scary hahah) but then I switched to my bottle caps, with almost new General Altimax Winter tires... I agree with the road feel though, with the current set up I can feel the paint on the road, and I take notice every day, it makes me very happy.




                  The car usually vibrates around 30-40 and when I leave that area of fall below it, the car drives like silk (finally). The car does not make any clucking noises, but when in reverse AND on a hill the car wants to like hop or something, I kinda think it is reverse going out.

                  The car does feel like it has body sway as well. It doesn't make any clunking noises either. It makes no difference as to what gear the car is in.

                  AN UPDATE though, upon inspecting the front rack, ONE of the mounting bolts is stripped out. Could this cause anything?

                  I want to jack the rear of the car up off the ground and make a cycle through my gears to check for driveline/hub vibration. Is there a center jacking point for the rear that I dont know about?
                  20% Accurate

                  Morty: Well Summer maybe people that create things aren’t concerned with your delicate sensibilities you know? Maybe the species that communicate with each other through a filter of your comfort are less evolved that the ones that just communicate? Maybe your problems are your own to deal with and maybe the public giving a shit about your feelings is a one way ticket to extinction.

                  Comment

                    #10
                    Body sway would be a symptom of TABs and /or subframe bushings. It feels like rear wheel steering on roads with small ruts. If the vibration doesn't feel like it's coming from a wheel, it's most likely the csb

                    Sent from my SM-N900V using Tapatalk
                    current fleet: '89 325is; '91 325ic; '88 325is; '91 325i

                    Comment

                      #11
                      Also, the car was owned by a BMW Certified Mech. The add said it had a new Guibo (not sure). The add also states it has a Blunttech Short Shift kit. Which it has a short shift no doubt and pretty sure I remember seeing picture of the install, with no drive shaft?

                      I am just wondering I guess, other than that and tires/wheels. What else could cause a vibration/rumble/hum at 30-40?

                      Thanks again for the time guys.
                      20% Accurate

                      Morty: Well Summer maybe people that create things aren’t concerned with your delicate sensibilities you know? Maybe the species that communicate with each other through a filter of your comfort are less evolved that the ones that just communicate? Maybe your problems are your own to deal with and maybe the public giving a shit about your feelings is a one way ticket to extinction.

                      Comment

                        #12
                        Well, looking at driveshaft on Turner.. How do I tell a difference in a threaded and non-threaded flange?

                        Also, sorry to keep bumping. But I drive an hour to work and an hour home. If there is something I can check for let me know. Only about a mile is limited to 35 and it is currently the bane of my existence.

                        I am going to try pulling it out of gear and letting it coast at those speeds.
                        Last edited by HerbE30; 11-26-2015, 05:42 PM.
                        20% Accurate

                        Morty: Well Summer maybe people that create things aren’t concerned with your delicate sensibilities you know? Maybe the species that communicate with each other through a filter of your comfort are less evolved that the ones that just communicate? Maybe your problems are your own to deal with and maybe the public giving a shit about your feelings is a one way ticket to extinction.

                        Comment

                          #13
                          I would use the part number from realoem.com for starters. Perhaps we haven't been clear enough. Your drive shaft is a two piece unit. The guibo connects the shaft to the transmission, and there is another bearing midway on the shaft called the center support bearing (the csb I keep referring to). The mount for that bearing has a rubber bushing that encases the bearing. This rubber fails over time. Putting the transmission in neutral wouldn't do anything to help since the differential would still turn the shaft. If the vibration stops when you're in neutral, then it's likely something else.

                          Sent from my SM-N900V using Tapatalk
                          current fleet: '89 325is; '91 325ic; '88 325is; '91 325i

                          Comment

                            #14
                            Originally posted by mybimr View Post
                            I would use the part number from realoem.com for starters. Perhaps we haven't been clear enough. Your drive shaft is a two piece unit. The guibo connects the shaft to the transmission, and there is another bearing midway on the shaft called the center support bearing (the csb I keep referring to). The mount for that bearing has a rubber bushing that encases the bearing. This rubber fails over time. Putting the transmission in neutral wouldn't do anything to help since the differential would still turn the shaft. If the vibration stops when you're in neutral, then it's likely something else.

                            Sent from my SM-N900V using Tapatalk
                            I thought it would worth an attempt since I have had these issues. It made no difference. Jacking the car up tomorrow.
                            I have seen many diagrams trying to get familiarized with the drivetrain, there is also a video on youtube of a rolling 30 with no exhaust shield and it shows what a bad csb looks like.

                            Thanks again for the help. I will post an update tomorrow after I get her off the ground.
                            20% Accurate

                            Morty: Well Summer maybe people that create things aren’t concerned with your delicate sensibilities you know? Maybe the species that communicate with each other through a filter of your comfort are less evolved that the ones that just communicate? Maybe your problems are your own to deal with and maybe the public giving a shit about your feelings is a one way ticket to extinction.

                            Comment

                              #15
                              Update and a little late:

                              I had the rear off the ground, with the wheel removed (for easier ground clearance, figure it was shaft related anyway) and when I ran my car through its gears it had the vibration at around the same speeds, only MUCH more noticeable. Should I try changing my CSB and Guibo or should I look into driveshafts already? There is one on craigslist for 75 at the moment.

                              I may be able to call one of my previous car owners (runs a shop for BMW and Porsche and has more certifications than most) and see if he has the tools to reman it, or there is also a Mack truck garage on my way to work. The fixed is somewhat like the same they use correct?

                              What are some other options?
                              20% Accurate

                              Morty: Well Summer maybe people that create things aren’t concerned with your delicate sensibilities you know? Maybe the species that communicate with each other through a filter of your comfort are less evolved that the ones that just communicate? Maybe your problems are your own to deal with and maybe the public giving a shit about your feelings is a one way ticket to extinction.

                              Comment

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