How do you break in a new car?

Discussion in 'Archived Threads 2001-2004' started by Ted Lee, Aug 12, 2002.

  1. Ted Lee

    Ted Lee Lead Actor

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    hi all -

    what is your technique...or what have you heard?

    i've been told you should really try to wear the engine at all rpm's (high and low). that will prevent the new engine from "grooving" into one particular range, allowing the engine to break in at all points along the "curve".

    also, i hear you should do mostly city driving, with lots of starts and stops? if you have to do freeway driving try to vary the speed? i assume this also has to do with varying the rpms?

    break in occurs at approx 500 miles?

    any thoughts welcome...

    ted
     
  2. Josh Lowe

    Josh Lowe Screenwriter

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    that stuff doesn't really matter any more. rings seat pretty much as soon as the motor is first turned over at the factory.
     
  3. Brian Kleinke

    Brian Kleinke Supporting Actor

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  4. Todd Hochard

    Todd Hochard Cinematographer

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    Varying RPMs is an OK idea, but don't feel obligated to run the engine at 5000+ rpm under light load. A recipe for disaster. If you wish to take a road trip, then occasionally drop back one gear from the top, hold for a minute, then return.

    My break-in rule is no full-power blasts for the first 1000 miles.

    Todd
     
  5. Brian Harnish

    Brian Harnish Screenwriter

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    I personally prefer a big rock through the back window but that's just me. [​IMG]
     
  6. Ted Lee

    Ted Lee Lead Actor

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    [​IMG]
    okay, clearly this is a good example of "think-before-you-title-your-post"
    hmm! thanks all...pretty much what i figured.
     
  7. Kevin P

    Kevin P Screenwriter

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    The vary-your-speed rule is good for engines, but don't forget the brakes too. Many cars' manuals specify that you avoid hard braking for the first 500-1000 miles to allow the pads/shoes and rotors/drums to break in properly. Of course, with all the idiots on the road this will be easier said than done, but for the most part you can do it by anticipating stops or reduction in speed and not slam on the brakes if you can avoid it.

    KJP
     
  8. Jared_B

    Jared_B Supporting Actor

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    My BMW required a 1200 miles break-in period. You were not supposed to exceed 4000rpm and not to do any full throttle starts. The whole varying speed thing also applied.

    Conversly, my last vehicle, a '99 S-10 4x4 had not specific break-in procedure. It had the low-tech push rod V6, while my BMW has a variable valve timing DOHC V8.
     
  9. Alex Prosak

    Alex Prosak Supporting Actor

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    Vary your speed and don't break too hard (if possible) for the first 1000 miles. Don't push the RPMs up too high (3500+) during this period as well. The RPMs may very somewhat depending on the make and model and whether the car is a stick or auto. I suggest checking some forums that would be specific to the vehicle.
     
  10. John Tillman

    John Tillman Supporting Actor

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    Ditto what Todd & Kevin said. In addition, do an oil & filter change after 1000 miles. The advice for brakes applies for all new brakejobs (no panic stops for fist 500 miles).
     
  11. Philip_G

    Philip_G Producer

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    it's kind of interesting cr mfgr's don't reccomend a break in period anymore. Motorcycles do, my bike was keep it under 5k for 500 miles then under 7k until 900 miles, varying RPM when you can. I do about the same for cars.
     
  12. Jeremy Allin

    Jeremy Allin Supporting Actor

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  13. Craig Robertson

    Craig Robertson Supporting Actor

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    i like a good shagging in the back seat.[​IMG]
     
  14. Ken Garrison

    Ken Garrison Supporting Actor

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    When I had my engine on my 84 Toyota Van rebuilt, it needed a break in period. They told us to drive it like normal. I took it easy though. After about 500 miles, then you should have the oil changed. A few metal shavings in the oil will be normal with a new engine. My engine was pretty tight when it was rebuilt. Now it's loosened up and my power is a little better. Wish I had even more power. Anyway, just take a bit easy on the first few hundred miles.
     
  15. Todd Hochard

    Todd Hochard Cinematographer

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  16. Ken Garrison

    Ken Garrison Supporting Actor

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    My brakes were also re-done during the rebuild. But WhyTF do they squeak when I'm backing up and I'm using my brakes to keep the backing up speed under control?
     
  17. Philip Hamm

    Philip Hamm Lead Actor

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    The owner's manual probably has the best advice. The engineers who built your car know better than a bunch of clowns on the internet. [​IMG]
     
  18. John Tillman

    John Tillman Supporting Actor

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    Philip, have you been withholding your membership checks? They seem to be punishing you by lowering your post count. It's like you're deep into a Florida election or something [​IMG].
     
  19. Philip_G

    Philip_G Producer

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    I can't recall seing a break in section in either of the last 2 new cars I purchased philip.
     
  20. Josh Lowe

    Josh Lowe Screenwriter

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    brakes are a totally different thing than an engine. bedding in new brakes is very important to guarantee that they are as effective as possible and increase pad/rotor life.
    these instructions from Baer on how to properly bed in new brakes on a street car are good:
    http://www.baer.com/bedding_street/
     

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