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BMW 5-Series Engine Questions



  • If you can live with an A6 2.7 turbo you can live with this car, seems to me. Your Audi 2.7 does not have a great reputation and yet it worked out for you, so that tells you something about the "odds" of being one of the unlucky ones.

    There has been (as you know) problems with valve noise on these engines and there are directives for fixing it...supposedly....but it sounds like you had some issues that were a bit more serious than valve lifters sucking in air.

    I'd say if the noise does not re-appear then you might consider keeping it.
  • I have a 2000 bmw 528i and it started makeing some noise and shaking alittle, then water started coming out. What do u think this problem is and is it expensive to fix?
  • MrShift@EdmundsMrShift@Edmunds Posts: 43,633
    Water coming out of WHERE? :surprise:

    What did the temperature gauge say at this time?
  • Im not sure where the water was coming out guessing from the radiator. But the temp gage was normal... it wasnt over heating or anything.
  • MrShift@EdmundsMrShift@Edmunds Posts: 43,633
    Well you know, IF the coolant is low enough, the temp gauge won't can't read "steam" in other needs to be submerged in a liquid.

    If you are gushing steaming hot water out, you should not be driving this car ONE FURTHER INCH.
  • It was driving good and i drove it for like 5-10 min and all of a sudden it started makeing that noise and it wanted to turn off... as of now it is parked. I just wanted to know if its expensive to fix the prob. :confuse:
  • MrShift@EdmundsMrShift@Edmunds Posts: 43,633
    Hard to say with so little info. Might be just a simple thing like a stuck thermostat or some such, or you could have the typical BMW issue of a cracked radiator.
  • Good enought answer... thanx. :)
  • jklossjkloss Posts: 39
    Can you supply me with the information you gave you BMW dealer regarding this problem - would be helpful to know what tech service bulletin was on you receipt or what they used to get BMW to do the installation of the redesigned valve heads..

    We have the same problem and at first the dealer said this is normal and all BMW's have this problem. Second time the preformed the recommended BMW fix and that lasted about two days. Any detailed information would be appreciated.

    If you want i can give you my e-mail address.
  • galamagalama Posts: 12
    I just got 2002 530i manual.
    Should i go with the Cold air intake or just K&N filter and keep it stock?
    What is better and what would give me better sound and power, longer life what is better for engine?
    tx Joe
  • shiposhipo Posts: 9,152
    Keep it stock.
  • MrShift@EdmundsMrShift@Edmunds Posts: 43,633
    I agree----Keep it stock and don't waste your money on a K&N filter. It's not easy to outsmart BMW engineers when it comes to very efficient intake design.
  • smartcpasmartcpa Posts: 7
    The only notation I see on my invoice is that they "sent PUMA Case in for Cyl. Head." The repair notation said PUMA 22345808, My complaint was that the engine made a loud tapping noise when idling. They tried their quick fix of bleeding the lifters, that worked for about 2 months, then the noise came back. Hope this helps. The engine runs quiet and smooth now.
  • mobiusf1mobiusf1 Posts: 15
    Honestly, go to a different dealer if you can. I've been to terrible dealers and amazing dealers. I'm sure there is a dealer that will be able to help you out.
  • galamagalama Posts: 12
    But don't you think I would get little extra power from K&N and better gas milege.
    I do think that cold air intake would be stupit.
  • shiposhipo Posts: 9,152
    Contrary to the marketing bilge that K&N would love for you to believe, it is a physical impossibility for your car to get better fuel economy with a K&N filter (or no filter at all for that matter). Why? Because your car (and pretty much ALL cars these days) measure the weight of the air entering the intake and then meters exactly the precise amount of fuel for that air. If, for the sake of argument, the K&N did allow more air in, the system would simply add more fuel and you'd have exactly the same fuel economy as if you had the stock paper filter in place (which provides much better filtration than a K&N), or no filter at all.

    As for more power, highly-HIGHLY unlikely. The BMW engineers aren't fools; they know how to build an intake system that efficiently feeds air to the engine, regardless of the environment or how firmly planted the drivers' foot is to the floor.

    Best regards,
  • MrShift@EdmundsMrShift@Edmunds Posts: 43,633
    Nope you don't get more HP or better gas mileage from a K&N filter all by itself, or if the dyno or your fuel gauge suggested that there is an improvement, it is so small as to be statistically irrelevant (in other words, it's within normal variations).

    I've tested these things many times and the best I can say is there is no gas mileage improvement that can be attributed to them, and as for "power", there might be better throttle response but no better 0-60 times, or again, so slight as to not justify the costs.

    If you found a very restrictive air intake system (not a BMW) and a very large engine, you might register 3-4 more HP on a dyno.

    My friends Porsche/Audi shop tested these on a dyno and got ZIP; however, in conjunction with well-engineered aftermarket exhaust systems, and changes to fuel-mapping, yeah, the K&N helped out.
  • galamagalama Posts: 12
    wow i see now you are right, i did think that K&N provides better filtration but openings are bigger so how would that be possible. So is there anything that would be better besides stock as far as better milege and more power when it comes to air intake? well im ok with milege more power would not hurt. How about chip? does it hurt engine?
  • roadburnerroadburner Posts: 6,011
    Like Shipo said, BMW doesn't leave much on the table with regards to hidden horsepower- at least with respect to their naturally aspirated cars. You'd be very lucky to pick up 5-6 bhp from a CAI and a re-flash.

    2009 328i / 2004 X3 2.5/ 1995 318ti Club Sport/ 1975 2002A/ 2007 Mazdaspeed 3/ 1999 Wrangler/ 1996 Speed Triple Challenge Cup Replica

  • MrShift@EdmundsMrShift@Edmunds Posts: 43,633
    Yeah there are chips available that seem to work---but you have to really do your homework and get on the specialty BMW sites and see what chips DO WORK and which are all smoke and mirrors.

    Also I like detailed info on the chip, so I know what they are manipulating in order to get the HP gains. Some chips do fuel enrichment, some boost timing, some just extend your automatic transmission shift points (don't need to spend $400 for THAT!).
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