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Registered
Join Date: Oct 2002
Location: Minneapolis, MN
Posts: 1,226
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removing carbon deposits
In the process of removing carbon deposits on a 2,2 engine.
Any tips? One suggestion was tape off everything except the dome of the piston and dry blast with a soft media (glass beads). What about the valves?. I would like to do as much at home prior to turning it over to the machine shop. 
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Thanks, Mike When I was a kid, I didn't want a stupid pony, I wanted a PORSCHE. 1970 911T Coupe, 1979 911SC Targa Euro, 1971 Honda CT70 HK Trail 70 (the ultimate in two wheeled transportation) |
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09-11-2003, 10:24 AM
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Back in the saddle again
Join Date: Oct 2001
Location: Central TX west of Houston
Posts: 56,767
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soak it in carb cleaner.
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Steve '08 Boxster RS60 Spyder #0099/1960 - never named a car before, but this is Charlotte. '88 targa  SOLD 2004 - gone but not forgotten
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09-11-2003, 10:29 AM
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I just did the same clean up. On the pistons I soaked upside down in kerosene overnight. Then with a fine emery/wet &dry gently rubbed the top of the piston. I used kerosene as the lubricating media. Came out really nice.Depending of how hard the carbon is you may have to start slightly coarser. On the valves, I tried all the soaking routes, carb cleaner, coke etc. The exhaust valves put up a good fight. Ended up masking the stems with duct tape and chucking them in a drill and gently abrading until I had cleaned them up. Came out pretty good. Take care though. Could've taken them to be blasted but I operate on the premise that I will only part with any of my parts only if absolutely necessary.
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Steve F 69 911 71 911 87 Carrera 2004 RAM 1500 4x4 "Hemi" |
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09-11-2003, 10:42 AM
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Registered
Join Date: Dec 1999
Location: TX USA
Posts: 9,804
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Specifically, Berryman's Chem-Dip! It wouldn't hurt to brush and turn over the piston a few time during the soak to give 'fresh' cleaner access to the carbon and lead deposits ... aeration/bubbles from a steel line submerged under the piston and supplied with air from an aquarium pump could keep the cleaner moving and improve the rate of loosening. Be sure to wear long-cuffed, heavy-duty rubber gloves and apron while handling the piston around the Chem-Dip ... or you will be running for a faucet in pain when it gets on your skin!!!
Rinse off with water and bristle brush should remove the carbon very easily. Good luck!
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Warren Hall, Jr. 1973 911S Targa ... 'Annie' 1968 340S Barracuda ... 'Rolling Thunder' Last edited by Early_S_Man; 09-11-2003 at 10:58 AM.. |
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09-11-2003, 10:54 AM
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JOT MON ABBR OTH
Join Date: Feb 2001
Location: USA
Posts: 3,238
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Don't forget to wear nitrile gloves!!
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David '83 SC Targa (sold ) MANLY babyblue honda '00 F250 7.3L (MINE!)'15 F250 Gas (Her Baby) '95 993 (sold )I don't take scalps. I'm civilized like white man now, I shoot man in back. |
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09-11-2003, 02:00 PM
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1969 and 1971 Porsche 911T/E 2.0L and 2.2L
