Engine Carbon Clean -- still necessary?

Discussion in 'Forced Induction & Engine Management' started by cbsteh, Nov 26, 2019.

  1. cbsteh

    cbsteh Senior Member
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    Has anyone done carbon cleaning on their car engines? Does it work? I was told in today's modern car engines, carbon cleaning is not necessary.
     
  2. lsm1991

    lsm1991 Senior Member
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    erm..... you could drive round without carbon cleaning so it was technically never ever a necessity but yeah carbon build up was/is a thing.

    from what i understand some modern cars (di) do need some sort of cleaning (cough cough* bee em dabew, tiny, the peoples car, and olympics sans one ring) after certain miles... could be my anal friends tho
     
  3. Izso

    Izso Boooooossst
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    It's not needed la. Unless you were running super rich or had poor tuning done then you even less need it. You need a retune.

    Drive hard and fast and it'll clear the carbon too.
     
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  4. Mitevo7

    Mitevo7 Senior Member
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    Depends whether you driving port fuel injected or direct fuel injected engine. Carbon build up for direct fuel injected engine will be at the intake valves, as fuel is injected directly into the cylinder, some gas blow by will cause oil gunk to slowly build up at the intake valves as we all should know, petroleum is a very good solvent and cleaner.

    Unlike fuel port injected engine, the fuel is sprayed before the intake valves, hence constantly keep the back of intake valves clean. I don't see necessity for fuel port injected engine to do carbon cleaning unless you are very lazy in engine oil change and cleaning the throttle body.
     
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  5. scoupe

    scoupe Senior Member
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    just like Mitevo7 said.. hence y some manufacturers have the cleaning recommended under the maintenance schedule. Not all though. i guess one of the way to prevent too much gunk build on these GDI engines is to have a baffled oil catch can installed. As part of my own DIY routine maintenance i do clean out the throttle from time to time. and yeah i do have a catch can installed :)
     
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  6. leinnz

    leinnz Senior Member
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    toyota SC force u to buy their carbon clean even though it is a new car
     
  7. scoupe

    scoupe Senior Member
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    aik, then i guess they are just up selling stuff.. all cari makan. hahahahah
     
  8. parakey

    parakey Senior Member
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    You have direct injection engine?
     
  9. ixeo

    ixeo Senior Member
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    No pour in fuel tank or engine oil solution can help DI engines. Spray cleaners into intake manifold then yes it does.

    But that’s a pain in the ass, especially if you hydro lock your engine.

    The real long term solution is to install NOS or methanol injection. I guarantee your intake valves will be clean on your GDI engine.

    Carbon clean is really bullshit. Use good engine oil. Change on time and occasionally use Caltex fuels when you’re almost empty.
     
  10. Mitevo7

    Mitevo7 Senior Member
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    For my GDI engine maintenance, every 20,000 km i will spray intake valves cleaner through the throttle and in pulsing manner. Barely noticeable difference but the engine definitely revs quieter and less consume on fuel.
     
  11. ixeo

    ixeo Senior Member
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    Thing is, we don't know how effective is it. Walnut shell blasting confirm will clean it. But every 20k km need to do this, I feel is troublesome. Install meth or NOS hahaha. Tell finance minister is to keep it healthy, then boost
     
  12. Mitevo7

    Mitevo7 Senior Member
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    The effort is collective, once you started cleaning at 20k km, then you have to be goddamn consistent in doing it. Walnut blasting is expensive as hell, chemicals are cheap plus labour is free when you DIY. Plus if your factory GDI engine is not equipped with stock oil and vapour separator, then you will need to install a oil catch can to reduce carbon build ups.
     
    #12 Mitevo7, Dec 4, 2019 at 12:06 PM
    Last edited: Dec 4, 2019 at 12:11 PM
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