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  1. #1
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    BMW B58 3.0 liter turbo technical training information and specifications

    BimmerBoost already covered how the B58 differs from the N55 it replaces along with dyno charts regarding the actual output of the new motor. The detailed info below is not about power output on the dyno and tuning potential but is straight from BMW regarding the technical design specifications.

    It is a great read if you have the time and also shows what goes into BMW's technical training.

    Enjoy the details on the mechanical components, oil supply, cooling system, intake, exhaust, vacuum supply, fuel system, and electrical system. Keep in mind this modular design is going to be with us for a while.

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  2. #2
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    I wonder how the aftermarket intercoolers will look. Can't imagine a front mount conversion being cheap...

    Does anyone know why bmw switched to rear timing chains? Did they just want this engine to be a nightmare to work on?

  3. #3
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    nice to see they switched to the standard design HPFP that Mercedes and VW have been using for the longest time....but then they took 10 steps back with the rear timing chain placement #audiproblems

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    Why is the rear timing chain placement a problem?

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    Click here to enlarge Originally Posted by Sticky Click here to enlarge
    Why is the rear timing chain placement a problem?
    Huge PITA to get to / work on.

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    Click here to enlarge Originally Posted by Sticky Click here to enlarge
    Why is the rear timing chain placement a problem?

    if theres any issues with it, usually means dropping the motor and splitting it from the transmission to get access to it. At the present time, all you have to do is maybe pull the radiator/fan, valve cover and front timing cover to fix anything. Motor remains in the car.

    I think you might have posted an article somewhere about the 4.2 V8 from Audi and their rear timing chain setup that goes bad and its $$$$$ to fix....

  7. #7
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    Click here to enlarge Originally Posted by Itsbrokeagain Click here to enlarge
    if theres any issues with it, usually means dropping the motor and splitting it from the transmission to get access to it. At the present time, all you have to do is maybe pull the radiator/fan, valve cover and front timing cover to fix anything. Motor remains in the car.

    I think you might have posted an article somewhere about the 4.2 V8 from Audi and their rear timing chain setup that goes bad and its $$$$$ to fix....
    Is there any advantage to the timing chain placement from an OEM point of view?

    I mean they probably don't care about people out of warranty repairing it as it's not their problem so their thinking is probably sucks for you after the warranty.

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    Hello 4.2l S4 ugh those timing chains Click here to enlarge that's gonna suck. I like the idea for the Integrated Intercooler, well see how efficient it really is at higher boost levels.

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    Click here to enlarge Originally Posted by Sticky Click here to enlarge
    Is there any advantage to the timing chain placement from an OEM point of view?

    I mean they probably don't care about people out of warranty repairing it as it's not their problem so their thinking is probably sucks for you after the warranty.
    When audi put it in the back of the engine it was because of easier packaging and they thought that the timing chain was something that wouldn't need servicing for the "entire life of the engine" aka while in warranty.
    Another reason to put it at the back of the engine could be for quicker assembly. All of the engine auxiliary stuff (water pump, alternator, AC) is at the front of the engine so a robot can assemble that stuff on the front while another is assembling the timing/vanos stuff at the back.
    Also, in Audi's case most of the problems were really from the chain guides not the timing chain itself so they were kinda right.
    We will see if it becomes an issue with the B engines but knowing BMW's track record with VANOS problems I would bet it becomes a big PITA. My N55 had a VANOS recall and it was pretty painless because it is in front and it was covered under warranty. But it was literally the same VANOS problem that has been happening since E46's where the bolts back out and/or shear off for no reason at all.
    Cadillac CTS-V - 6MT - Lingenfelter upper pulley, Airaid CF Intake, Magnaflow exhaust, fluidyne H/X

  10. #10
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    Click here to enlarge Originally Posted by subaru335i Click here to enlarge
    When audi put it in the back of the engine it was because of easier packaging and they thought that the timing chain was something that wouldn't need servicing for the "entire life of the engine" aka while in warranty.
    Another reason to put it at the back of the engine could be for quicker assembly. All of the engine auxiliary stuff (water pump, alternator, AC) is at the front of the engine so a robot can assemble that stuff on the front while another is assembling the timing/vanos stuff at the back.
    There we go, that makes sense.

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