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James, You don't have to tear apart the engine! If your heads and plugs are stock then they should be fine. Spark plug threads become a factor if you are using non-stock plugs and/or a non-stock head. Generally, two or more threads exposed *may* increase your chances of pre-ignition. They have to get real hot first and in a stock application with everything functioning correctly chances are small that this will happen. The major gas companies have fuel treatments in their high octane fuels (90+) and I think they may even put it in their lower octanes (Chevron?). You can also get fuel additives from any local auto parts store, like STP. If you use the good, higher octane fuels then carbon deposits shouldn't be an issue. Toby Erkson air_cooled_nut@pobox.com <-- Please use this address for email '72 VW Squareback 1.6L bored and stroked to 2.0L, Berg five-speed '75 Porsche 914 1.8L, ORPCA member Portland, Oregon, http://www.pobox.com/~toby_erkson/ >-----Original Message----- >Well, I'm not really financially in a position to be breaking >the motor down >at this point. I will attempt the injector cleaner/deposit >remover route ------------------------------------------------------------------- Search old messages on the Web! Visit http://www.vwtype3.org/list/