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Discuss Best way to remove carbon deposits in the rec.autos.makers.honda forum at Car Dealer Forums; Short of removing cylinder heads and scraping the carbon deposit off the combustion chamber surfaces, ...
  1. #1
    Bill Forintos
    Guest

    Default Best way to remove carbon deposits

    Short of removing cylinder heads and scraping the carbon deposit off the
    combustion chamber surfaces, is there some gentler method that is also not
    harmful to the CC? What are the profs using? The stores are full with
    various additives but I don't know if one could trust their claims.

    Thanks,
    Bill




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  2. #2
    Elmo P. Shagnasty
    Guest

    Default Re: Best way to remove carbon deposits

    In article <g1fl45$fbe$1@aioe.org>, "Bill Forintos" <BF@nospam.invalid>
    wrote:

    > Short of removing cylinder heads and scraping the carbon deposit off the
    > combustion chamber surfaces, is there some gentler method that is also not
    > harmful to the CC? What are the profs using? The stores are full with
    > various additives but I don't know if one could trust their claims.
    >
    > Thanks,
    > Bill


    Ah, the Italian tuneup. Take her out and run the piss out of
    her--sustained high speeds and RPMs.

    Seriously, Techron works. So does the V-Power additive package that
    Shell puts into its 93 octane.

    You'll want something that goes in the gas tank that cleans out the
    whole fuel and combustion system. I know that several tanks of V-Power
    will do wonders.


  3. #3
    jim beam
    Guest

    Default Re: Best way to remove carbon deposits

    Elmo P. Shagnasty wrote:
    > In article <g1fl45$fbe$1@aioe.org>, "Bill Forintos" <BF@nospam.invalid>
    > wrote:
    >
    >> Short of removing cylinder heads and scraping the carbon deposit off the
    >> combustion chamber surfaces, is there some gentler method that is also not
    >> harmful to the CC? What are the profs using? The stores are full with
    >> various additives but I don't know if one could trust their claims.
    >>
    >> Thanks,
    >> Bill

    >
    > Ah, the Italian tuneup. Take her out and run the piss out of
    > her--sustained high speeds and RPMs.
    >
    > Seriously, Techron works. So does the V-Power additive package that
    > Shell puts into its 93 octane.
    >
    > You'll want something that goes in the gas tank that cleans out the
    > whole fuel and combustion system. I know that several tanks of V-Power
    > will do wonders.
    >


    and still do the italian tune-up. it clears carbon deposits
    marvelously. full throttle, steepest fastest longest uphill you can
    find. several times. hondas love that.

    i did some head work on my civic a couple of years ago. i'd been
    flogging the poor thing to los angeles and las vegas from san francisco
    at high speed for a year. it was so clean inside, you could see the
    metal of the piston tops!


  4. #4
    Bill Forintos
    Guest

    Default Re: Best way to remove carbon deposits

    "jim beam" <spamvortex@bad.example.net> wrote:
    > and still do the italian tune-up. it clears carbon deposits marvelously.
    > full throttle, steepest fastest longest uphill you can find. several
    > times. hondas love that.
    >
    > i did some head work on my civic a couple of years ago. i'd been flogging
    > the poor thing to los angeles and las vegas from san francisco at high
    > speed for a year. it was so clean inside, you could see the metal of the
    > piston tops!


    Thanks guys for the tip but here is my problem with your suggestions:
    The main reason I want to get rid off the carbon build-up is the pinging in
    the pistons when the engine runs hot and hard. What you are suggesting would
    make the pinging probably intolerable during the "Italian tune-up".
    Besides, wouldn't that also damage the catalytic converter (CC)? How about
    any dark exhaust coming out of the muffler during the process? That might
    almost invite the cops to pull me over, no? Back in '80s I once tried one
    of those cleaning additives by pouring it in a 4-barrel carburator and boy,
    what a smoke that created for a while behind my Cutlass! (That was before
    CC.) I would not want to go through that experience again.

    By the way, I usually fill up with Chevron gas that does contain the Techron
    additive but I don't see any noticeable reduction in pinging. So what gives?

    BF


  5. #5
    Grumpy AuContraire
    Guest

    Default Re: Best way to remove carbon deposits



    Bill Forintos wrote:

    > "jim beam" <spamvortex@bad.example.net> wrote:
    >
    >> and still do the italian tune-up. it clears carbon deposits
    >> marvelously. full throttle, steepest fastest longest uphill you can
    >> find. several times. hondas love that.
    >>
    >> i did some head work on my civic a couple of years ago. i'd been
    >> flogging the poor thing to los angeles and las vegas from san
    >> francisco at high speed for a year. it was so clean inside, you could
    >> see the metal of the piston tops!

    >
    >
    > Thanks guys for the tip but here is my problem with your suggestions:
    > The main reason I want to get rid off the carbon build-up is the pinging
    > in the pistons when the engine runs hot and hard. What you are
    > suggesting would make the pinging probably intolerable during the
    > "Italian tune-up". Besides, wouldn't that also damage the catalytic
    > converter (CC)? How about any dark exhaust coming out of the muffler
    > during the process? That might almost invite the cops to pull me over,
    > no? Back in '80s I once tried one of those cleaning additives by
    > pouring it in a 4-barrel carburator and boy, what a smoke that created
    > for a while behind my Cutlass! (That was before CC.) I would not want
    > to go through that experience again.
    >
    > By the way, I usually fill up with Chevron gas that does contain the
    > Techron additive but I don't see any noticeable reduction in pinging. So
    > what gives?
    >



    In the old days of carbureted vehicles, you could use water injection
    which literally "steam cleans" the combustion chamber. I have no idea
    whether you could do so in a modern fuel injected computerized engine
    though.

    JT


  6. #6
    jim beam
    Guest

    Default Re: Best way to remove carbon deposits

    Bill Forintos wrote:
    > "jim beam" <spamvortex@bad.example.net> wrote:
    >> and still do the italian tune-up. it clears carbon deposits
    >> marvelously. full throttle, steepest fastest longest uphill you can
    >> find. several times. hondas love that.
    >>
    >> i did some head work on my civic a couple of years ago. i'd been
    >> flogging the poor thing to los angeles and las vegas from san
    >> francisco at high speed for a year. it was so clean inside, you could
    >> see the metal of the piston tops!

    >
    > Thanks guys for the tip but here is my problem with your suggestions:
    > The main reason I want to get rid off the carbon build-up is the pinging
    > in the pistons when the engine runs hot and hard. What you are
    > suggesting would make the pinging probably intolerable during the
    > "Italian tune-up". Besides, wouldn't that also damage the catalytic
    > converter (CC)? How about any dark exhaust coming out of the muffler
    > during the process? That might almost invite the cops to pull me over,
    > no? Back in '80s I once tried one of those cleaning additives by
    > pouring it in a 4-barrel carburator and boy, what a smoke that created
    > for a while behind my Cutlass! (That was before CC.) I would not want
    > to go through that experience again.
    >
    > By the way, I usually fill up with Chevron gas that does contain the
    > Techron additive but I don't see any noticeable reduction in pinging. So
    > what gives?
    >
    > BF


    if you're getting detonation, for a honda, the most likely cause is
    excessive carbon build-up, the plugs are the wrong grade, or the timing
    is out. it could be an excessively skimmed head if the head's been off,
    but that's not so likely.

    check timing, [with the timing reset jumper in place], make sure the
    plugs are good, i.e. just change them anyway, use ngk or denso, then do
    the italian thing. don't worry about the catalyst - it's made to
    withstand that kind of treatment.

    if that doesn't work, report back.

  7. #7
    Elmo P. Shagnasty
    Guest

    Default Re: Best way to remove carbon deposits

    In article <g1i2rh$sv6$1@aioe.org>, "Bill Forintos" <BF@nospam.invalid>
    wrote:

    > Back in '80s I once tried one
    > of those cleaning additives by pouring it in a 4-barrel carburator and boy,
    > what a smoke that created for a while behind my Cutlass! (That was before
    > CC.) I would not want to go through that experience again.


    That was COMPLETELY different than what we're talking about, using
    Techron in the fuel tank.


  8. #8
    Bill Forintos
    Guest

    Default Re: Best way to remove carbon deposits

    "jim beam" <spamvortex@bad.example.net> wrote:
    > if you're getting detonation, for a honda, the most likely cause is
    > excessive carbon build-up, the plugs are the wrong grade, or the timing is
    > out. it could be an excessively skimmed head if the head's been off, but
    > that's not so likely.


    Well, the car has 264 K miles in it, so I assume carbon buildup is to be
    expected after that much use, even with Chevron gas and proper tune-up.

    > check timing, [with the timing reset jumper in place], make sure the plugs
    > are good, i.e. just change them anyway, use ngk or denso, then do the
    > italian thing. don't worry about the catalyst - it's made to withstand
    > that kind of treatment.


    This car has been maintained per Honda's schedule, so I don't know ...

    Bill


  9. #9
    jim beam
    Guest

    Default Re: Best way to remove carbon deposits

    Bill Forintos wrote:
    > "jim beam" <spamvortex@bad.example.net> wrote:
    > > if you're getting detonation, for a honda, the most likely cause is
    >> excessive carbon build-up, the plugs are the wrong grade, or the
    >> timing is out. it could be an excessively skimmed head if the head's
    >> been off, but that's not so likely.

    >
    > Well, the car has 264 K miles in it, so I assume carbon buildup is to be
    > expected after that much use, even with Chevron gas and proper tune-up.


    not necessarily - depends how it's driven. it's not a joke, running the
    engine at high speed, full throttle, really does burn out most of the
    carbon because the engine components reach a temperature where this can
    happen. there's no reason an engine at 500k miles can't be cleaner than
    an engine that's slugged about for only 50k.

    >
    >> check timing, [with the timing reset jumper in place], make sure the
    >> plugs are good, i.e. just change them anyway, use ngk or denso, then
    >> do the italian thing. don't worry about the catalyst - it's made to
    >> withstand that kind of treatment.

    >
    > This car has been maintained per Honda's schedule, so I don't know ...


    the catalyst can most definitely take the heat if the engine is running
    properly. the only time you have problems with a catalyst is if there
    is fuel contamination or excess hydrocarbon load like a missing plug or
    a leaking injector. and even then, only after a prolonged period.

  10. #10
    TE Chea
    Guest

    Default Re: Best way to remove carbon deposits

    | is there some gentler method that is also not harmful to the CC?
    Pump ozone in, to oxidise carbon to CO2.

    | various additives but I don't know if one could trust their claims.
    None approved by AAA ? Is Redex 1 of these ?

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