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914World.com _ 914World Garage _ Cleaning carbon
Posted by: Elliot Cannon Jan 6 2014, 05:28 PM
After getting my heads rebuilt I am Finally getting around to putting my engine back together. Can anyone recommend a good (easy) way to clean the carbon deposits off the heads? Can this be done OK without removing the cylinders?
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Posted by: SLITS Jan 6 2014, 05:57 PM
Put it back together ... fire it up and pour a cup of water slowly down the intake(s) at 2000 RPM .....
or
in your case
Fine wine!
Posted by: jimkelly Jan 6 2014, 06:29 PM
is oven cleaner NOT safe ?
Posted by: r_towle Jan 6 2014, 06:34 PM
Put it back together ... fire it up and pour a cup of water slowly down the intake(s) at 2000 RPM .....
or
in your case
Fine wine!
Except the wine suggestion.
Oven clean is not safe inside a motor....no no no
you can use it outside, but I would not do it.
A wire wheel also works.
Posted by: 76-914 Jan 6 2014, 07:24 PM
w/ Schlitz. squirting it in with a bottle doesn't kill the engine as easily. Glad to see you back. I was beginning to think those "old charges" were brought up against you. 
Posted by: Elliot Cannon Jan 6 2014, 08:20 PM
w/ Schlitz. squirting it in with a bottle doesn't kill the engine as easily. Glad to see you back. I was beginning to think those "old charges" were brought up against you. Three arrests, NO convictions.
Posted by: Elliot Cannon Jan 6 2014, 08:23 PM
Put it back together ... fire it up and pour a cup of water slowly down the intake(s) at 2000 RPM .....
or
in your case
Fine wine!
Your $hitin' me right?
Water down the intake? How about a small brass wire wheel? Will that work OK? I don't want to damage the top of the piston. Is that even possible? Posted by: yeahmag Jan 6 2014, 08:32 PM
Water does work, but a squirt bottle works better. Just keep from stalling it.
Posted by: r_towle Jan 6 2014, 08:37 PM
High pressure steam cleaning.
Google it, it has worked since before slits was born.
Posted by: euro911 Jan 6 2014, 08:43 PM
We use to de-carbonize using water while on a dyno (on running engines)
Pull the jugs off one at a time, stuff rags on the case opening and wheel them. You don't want to nick the tops of the cylinders.
Posted by: SLITS Jan 6 2014, 08:55 PM
We use to de-carbonize using water while on a dyno (on running engines)
Pull the jugs off one at a time, stuff rags on the case opening and wheel them. You don't want to nick the tops of the cylinders.
No wire wheel marks on the top of the piston either.
Water works
or
Brake cleaner & rags
Posted by: r_towle Jan 6 2014, 09:00 PM
My concern with any type of wire wheel is all my wire wheels get smaller with time and use, and eventually there are no wire pieces left.....so they go somewhere, and you might get one lodged into the side of the piston, just laying on top of a ring, and you won't see it.
Then you know what it might do...
Use water or rags and cleaner.
Posted by: StratPlayer Jan 6 2014, 09:06 PM
http://www.orisonmarketing.com/pistonkleen.html
Posted by: jeffdon Jan 6 2014, 09:37 PM
Put it back together ... fire it up and pour a cup of water slowly down the intake(s) at 2000 RPM .....
or
in your case
Fine wine!
Your $hitin' me right?
Water down the intake? How about a small brass wire wheel? Will that work OK? I don't want to damage the top of the piston. Is that even possible?Hey Elliot....How many miles on that motor? I had about 8k on mine, and had some nasty carbon, but my plugs have always read a nice mixture. How much carbon and how fast the build up is natural?
Posted by: SLITS Jan 6 2014, 09:47 PM
Ok Av8tor .... The water hitting the hot cylinder flashes to steam instantly, creating a shock which cracks the carbon deposits. They chip off and go down the exhaust.
As I remember your pic, the deposits are shiny, like being wet. Looks like oil. Try the Brake cleaner first and see if the deposit dissolves somewhat easily.
Posted by: McMark Jan 7 2014, 01:34 AM
Why bother? Or are you planning on tearing down the engine to clean the pistons before each Concours event? 
Seriously, everything you clean will be back on there in short order. Don't waste your time.
Posted by: Elliot Cannon Jan 7 2014, 02:12 AM
Why bother? Or are you planning on tearing down the engine to clean the pistons before each Concours event?
Seriously, everything you clean will be back on there in short order. Don't waste your time.
OK! Now this is an answer I can live with.
Posted by: ConeDodger Jan 7 2014, 06:58 AM
Why bother? Or are you planning on tearing down the engine to clean the pistons before each Concours event?
Seriously, everything you clean will be back on there in short order. Don't waste your time.
OK! Now this is an answer I can live with.
Posted by: Mark Henry Jan 7 2014, 09:29 AM
As a builder I've never liked the water trick...
Wait a second...bent rods = more work 
Nevermind....carry on.... 
Posted by: Matt Romanowski Jan 7 2014, 09:38 AM
McMark is right. If you're not taking it all the way apart, leave it alone. You're only going to get more crap in the motor and oil. That is not an excessive amount of carbon and will be back after about 10 minutes of running.
Posted by: Bartlett 914 Jan 7 2014, 09:59 AM
While you are in there,do clean what will easily come off. I had a motor sitting around. When I went to install it, it would not turn completely around. It was loose carbon that had fallen down causing the piston to bind at the head.
Posted by: ruby914 Feb 6 2014, 08:58 PM
http://www.ppg.com/coatings/aerospace/coatings/coatingsproducts/Documents/CT_2500_Diphase_Carbon_Remover.pdf
http://www.ppg.com/coatings/aerospace/coatings/coatingsproducts/Documents/CT_2400_Carbon_Remover_and_Paint_Stripper.pdf
http://www.ppg.com/coatings/aerospace/coatings/coatingsproducts/Documents/HT_2220_Carbon_Remover.pdf
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