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Car Forum / Honda Cars / June 2008Best 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 > Short of removing cylinder heads and scraping the carbon deposit off the > combustion chamber surfaces, is there some gentler method that is also not [quoted text clipped - 3 lines] > 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. >> Short of removing cylinder heads and scraping the carbon deposit off the >> combustion chamber surfaces, is there some gentler method that is also not [quoted text clipped - 13 lines] > 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! > and still do the italian tune-up. it clears carbon deposits marvelously. > full throttle, steepest fastest longest uphill you can find. several [quoted text clipped - 4 lines] > 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 >> and still do the italian tune-up. it clears carbon deposits >> marvelously. full throttle, steepest fastest longest uphill you can [quoted text clipped - 20 lines] > 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 >> and still do the italian tune-up. it clears carbon deposits >> marvelously. full throttle, steepest fastest longest uphill you can [quoted text clipped - 22 lines] > > 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. > 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 > > 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 [quoted text clipped - 3 lines] > 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. > 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. | 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 ? > | is there some gentler method that is also not harmful to the CC? > Pump ozone in, to oxidise carbon to CO2. that's a classic!!! newsflash for you chea - O2 oxidizes carbon too. especially when the carbon is warm. tell you what though - why don't you pump in chlorine gas instead? that's an even stronger oxidizer. i figure you're not too worried about your health since you seem to think ozone is a good idea. > | 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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