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Topic Review (Newest First)
10-03-2012 05:15 PM
xzero117 wow I meant brake cleaner, 1 can should be enough for all 8 pistons, with a little scrubbing via tooth brush
10-03-2012 04:26 PM
xzero117 oven cleaner and a toothbrush, just polish each piston one by one, carbon melts away
10-03-2012 04:10 PM
87knotch My father used to build sports cars and taught me this neat trick how to get carbon, dirt, etc out of an engine cylinder (with the pistons in the engine).
Turn the crankshaft until the 1st piston is at the bottom of its stroke,
Then wipe the cylinder wall down with a heavy oil (straight 30 wt or heavier) then turn the crank until the piston up until its about an inch from the top of the cylinder and stop and turn the crank in the other direction.
As the piston travels back down the dirt etc, will remain suspended in the ring of oil running down the cylinder wall and you just wipe it out with a clean rag.
Then continue until all cylinders are clean.
This method traps the smallest particles.
Using a vacuum 1st would be a good idea.
03-12-2007 10:01 PM
techinspector1
Quote:
Originally Posted by jimfulco
Be sure to hide it in a barrel so she thinks it's a shop-vac.
Laughing out loud here.....
03-12-2007 08:02 PM
jimfulco
Quote:
Originally Posted by techinspector1
If you are going to scrape or wire brush the pistons, run each one up to top dead center to do it, then use a shop vac with a snorkel attachment to vacuum the crud from around the ring lands. I've done it many times. No shop vac? Use mom's or girlfriend's or wife's vacuum cleaner.
Be sure to hide it in a barrel so she thinks it's a shop-vac.
03-12-2007 01:11 AM
techinspector1 If you are going to scrape or wire brush the pistons, run each one up to top dead center to do it, then use a shop vac with a snorkel attachment to vacuum the crud from around the ring lands. I've done it many times. No shop vac? Use mom's or girlfriend's or wife's vacuum cleaner.
03-12-2007 12:18 AM
mike 96 ws6
Quote:
Originally Posted by joe_padavano
Oven cleaner is the best, least expensive way to remove carbon deposits.
I would not suggest applying oven cleaner {acid} to a set of pistons.
A quality ring grove cleaner can take care of the carbon deposits there. A dishwashing pad made of brass guaze {Chore-Boy ect.} can clean most of the surface stuff on the skirts whithout gouging, and the carbon on top can be scraped with a dull pocket knife. The trick on the top of the piston is to keep a smooth surface, even if it means leaving a thin layer of carbon in some spots.
True: Excessive carbon film on the top of the piston can lead to preignition issues.
And, 'No carbon' is excellent.
But: Scatched surface imperfections on top of the piston will created an area for carbon to collect in that space and will enhance combustion chamber ignition local to that specific area of the piston, rather than allowing a uniform charge ignition across the piston top in that chamber.
JMO
Have Fun !!!
03-12-2007 12:09 AM
ChevelleSS_LS6 http://www.sohc4.us/forums/index.php?topic=18647.0
03-11-2007 09:22 PM
junior stocker Used to use Hydroseal, a decarbonizer. Gunk makes a similar product. Kerosene soak overnight. I stay away from any kind of wire wheel or brush. Just soak overnight in the right stuff, use a parts brush, and bright shiny aluminum. BUTCH.
03-11-2007 09:15 PM
joe_padavano Oven cleaner is the best, least expensive way to remove carbon deposits.
03-11-2007 09:01 PM
cabowabo
man dude

Quote:
Originally Posted by GMCTRUCKS
What truth does soaking piston in Coca-Cola do for removing carbon off them I heard that once but never tried it.
its hard to snort coke pistons up the nose
03-11-2007 08:23 PM
Lil Big Mec
Quote:
Originally Posted by GMCTRUCKS
What truth does soaking piston in Coca-Cola do for removing carbon off them I heard that once but never tried it.
Would probably work pretty good. Ever dropped a nail in a can of coke? Gone in less than a week! Personally, I've had good (great actually!) success soaking them in carb cleaner.
03-11-2007 07:17 PM
GMCTRUCKS
Cleaning

What truth does soaking piston in Coca-Cola do for removing carbon off them I heard that once but never tried it.
03-11-2007 06:42 PM
strikingthematch When I cleaned my off I had my engine on a stand so this was a little easier to do. Rotated it so that the side I was cleaning faced down and slightly to the side. The bores on either side of the piston I was cleaning where tapped over so that no dirt got in them, also keeping the holes for the head bolts covered. Rotate the positions till the one you want to clean is at TDC and used a wire wheel to clean it.
The bore was lubricated with a thin coating of oil since the engine had been out for an extended period of time.
I took a wire wheel and went over the large portions of the piston till it was clean
The small dishes in the piston easily cleaned with a brush. Getting all the little bit out if there can be a pain but it completes the job.
When all the work was done the finished piston was rotated back down the bore the oil caught most of the dust.
I cleaned the oil away from there and the job was done. Also make sure to wipe down the piston top for left over dust.
A nice repeat process to go on from here and of course a double triple check at the end just remember how little it takes to kill a bearing.

... for an engine in a car i would use the same process but be even more careful about dust falling down into the ring land while cleaning. best of luck.

Chris
03-11-2007 05:16 PM
GearJamminHero
Quote:
Originally Posted by xntrik
piston tops only.
x2.

You dont want to let that wheel touch the ringlands or skirts, especially if they are anodized or have some coating. Chrysler sells combustion chamber cleaner, I hear it works pretty well.
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