[DML] Re: carbon deposits in combustion chamber

["David Teitelbaum" <jtrealty@xxxxxxxxxxx>]

You could try a "Top End Cleaner". It is either something you add to
the gas or the better kind, if you can find it, is poured through the
intake while the motor is running. In the "good old days" before
catalytic converters we used to pour diesel fuel in the intake or
sometimes spray water in to blow out the carbon. Today with the cats
you have to be careful what you introduce into the motor so you don't
damage the cat or the O2 sensor. The ultrasonic cleaner may do a good
job on the outside of the injectors but the only way I know to clean
then inside is to use the injector tester-cleaner as shown in the
Workshop Manual. I use mineral spirits, it has the same viscosity of
fuel and dissolves the deposits.
IMHO I would leave the carbon alone, if large chunks come loose all at
once they could damage the spark plugs, plug the cat, hang up a valve,
etc. If you are running a good brand of fuel there should not be much
carbon.
David Teitelbaum
vin 10757

--- In dmcnews@xxxxxxxxxxxxxxx, "supermattthehero" <supermatty@xxxx>
wrote:
> Hello,
> 
> I pulled off my intake manifold last weekend to clean things up, and I





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