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valve cleaning

 
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Old 01-26-2012, 10:28 AM
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valve cleaning

so i got a major problem. i have my exhaust valves and they are covered in carbon and no matter what i do i either mess up the valves or the carbon wont come off. i need serious help. i cant buy new ones.
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Old 01-26-2012, 10:36 AM
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Re: valve cleaning

That's somewhat normal. Carbon deposits are normal and have been around long before you were born. Same with me. It's like soot in a tailpipe or a chimney. It's a byproduct of burning gasoline. Sorry. My lude runs perfect and the valves most likely have carbon deposits on them. Guess that's why I don't worry about it cause I can't see them with the engine running.
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Old 01-26-2012, 07:34 PM
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Re: valve cleaning

have you tried sandblasting, when i did a head gasket on my old prelude i sanblasted the head and made sure to clean it out real good after words so there wasnt any left over sand. it looked like new when i was done and ran great
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Old 01-26-2012, 08:52 PM
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Re: valve cleaning

Wire wheel on a bench grinder
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Old 01-26-2012, 10:01 PM
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Re: valve cleaning

No matter what u.do, it'll come back...ludes but gas and oil like no other, takes allot of work and money to stop it all
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Old 01-26-2012, 10:02 PM
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Re: valve cleaning

Burn** not but
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Old 01-27-2012, 03:50 AM
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Re: valve cleaning

thanks guys i guess ill just put em back in the way they is. just bugs when i can clean everything else and this one thing cant be cleaned. im tryin to get mine back to perfect runnin order. the last person to work on it put cheap replacement parts inside.
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Old 01-28-2012, 07:16 PM
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Re: valve cleaning

It's not like the carbon builds up instantly. Clean them while they're out, then do it again in another 200k miles
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Old 01-28-2012, 11:21 PM
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Re: valve cleaning

I would say leave the valves soaking in fuel injection cleaner, then steam off with one of those portable steam guns. Might take some time, but cheapest alternative.
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THE IMITATION OF ANY OR ALL MANEUVERS EXECUTED BY A BA B20A 4WS PRELUDE IS HAZARDOUS TO YOUR CAR'S HEALTH. DRIVING A PRELUDE MAY CAUSE LOSS OF INTEREST IN OTHER CARS, WOMEN AND SPEED LIMITS. OTHER SYMPTOMS INCLUDE SLEEPLESS NIGHTS, COLD SWEATS AND OTHER SYMPTOMS RELATED TO ADDICTION. IF THE SYMPTOMS PERSIST,DRIVE!
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Old 01-29-2012, 12:29 AM
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Re: valve cleaning

Remember...... More carbon means a smaller combustion area which means higher compression. A B20A5 is 9:1 compression ratio but the JDM B20A is 9.4:1. Nobody can see how clean your valves are while it's running. Put the engine together and stop admiring the cleanliness of the parts cause it won't last long. Did I mention that nobody will see it?
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Old 01-30-2012, 10:18 PM
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Re: valve cleaning

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Originally Posted by Lespaul59 View Post
Remember...... More carbon means a smaller combustion area which means higher compression. A B20A5 is 9:1 compression ratio but the JDM B20A is 9.4:1. Nobody can see how clean your valves are while it's running. Put the engine together and stop admiring the cleanliness of the parts cause it won't last long. Did I mention that nobody will see it?
But a clean, smooth valve flows faster than a rough valve

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Old 01-31-2012, 03:54 AM
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Re: valve cleaning

mine look like the one on the left but with carbon all over it.
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