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#1 |
Active Member
![]() Join Date: Nov 2005
Location: Austin
Posts: 217
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decarbonizing and degreasing engines
Hey guys,
I am in the middle of rebuilding an inline 6, and I wonder what y'all use to remove the carbon buildup in the exhaust ports / cylinder head, etc. As far as degreasing goes (this engine is caked in about a 1/4" of mud and oil), I have been using simple green and some brushes. It's slow, but it seems to be working. Any recommendations there would be appreciated. Thanks! ![]() |
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#2 |
SWB 4X4 CLUB
Join Date: Feb 2005
Location: PA
Posts: 1,088
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Re: decarbonizing and degreasing engines
Go to the dollar store and get some oven cleaner. Let soak and spray off with hose.
Jason |
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#3 |
Registered User
Join Date: Jun 2001
Location: cambridge,ont,canada
Posts: 128
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Re: decarbonizing and degreasing engines
As far as for removing Carbon...Transmision fuild and some sort of small brush works very well. It doesn't need to be a wire brush either. Good luck.
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Nelson 1970 C10 350 Auto. A/C not Working |
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#4 |
Senior Member
Join Date: Apr 2005
Location: Joppa, Maryland
Posts: 4,408
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Re: decarbonizing and degreasing engines
Gastrol Super Clean & Easy Off Oven Cleaner............and a little "elbow grease"
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1997 GMC Sierra Ext 1965 Mustang |
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#5 |
Registered User
Join Date: Mar 2005
Location: Just outside Durham, NC
Posts: 894
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Re: decarbonizing and degreasing engines
you could always get a big tub, a gallon or two of diesel, and just let it soak over night....should help loosen everything up a bit and not be too expensive.
__________________
1969 SS 350 Camaro Sold 2008 1970 3/4T K20, stock height with 33's, 250 I6, 3 on the tree, and locked front and rear 4.10's ![]() 1980 Chevy Malibu 2 dr Sold 2007 1993 Olds. Cutlass Ciera Wagon Traded 2006 2003 Saturn L200 w/5pd. D/D My list spans 5 decades with One common thread.....GM! |
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#6 |
Registered User
Join Date: Feb 2005
Location: Carl Junction, Missouri
Posts: 2,061
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Re: decarbonizing and degreasing engines
i have a 20 gallon parts washer, like a tub. you set parts in it with some cleaner of your choice and it gets it off with help from a brush. i was doing that an hour ago with some pulleys and engine brackets caked in grease and dirt, well it was too thickly covered to work fast enough for me, so i took the pressure washer and got all the parts degreased and down to the metal in about 3 minutes per part.
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#7 |
Active Member
![]() Join Date: Nov 2005
Location: Austin
Posts: 217
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Re: decarbonizing and degreasing engines
thanks guys - I never would have thought to try oven cleaner - I'll give that a shot and report back.
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#8 |
Franko72
Join Date: May 2004
Location: Cincinnati,Ohio
Posts: 471
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Re: decarbonizing and degreasing engines
might sound like too much work , but I have used different types of drill wire wheel brushes and try to brush out hard deposits first , then apply degreaser.
An air compressor with the right tools .finish off with blowing everything down with air nozzle.
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![]() 1972 C20 cheyenne Super 402 BB/400 turbo LWB A/C Tilt, Cruise Control, Saddle tanks, Tach My Home Page Better to burn out than it is to rust |
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#9 |
Registered User
![]() Join Date: Aug 2001
Location: SOMERSET KY.
Posts: 6,427
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Re: decarbonizing and degreasing engines
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junkyardjohn 69 1 TON TOW TRUCK // 84 4WD CUCV BLAZER// 85 1 TON 4WD STAKE TRUCK// 86 M1031 5/4 TON 4WD CUCV// ALOT OF OLD TRUCKS FOR ONE OLD MAN TO DRIVE. ![]() LIFE MEMBER OF P.E.T.A (PEOPLE EATING TASTY ANIMALS) DON'T RENT U-HAUL ALWAYS TELL THE TRUTH IT WILL AMAZE PART OF THE PEOPLE & ASTONISH THE REST |
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#10 |
Active Member
![]() Join Date: Nov 2005
Location: Austin
Posts: 217
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Re: decarbonizing and degreasing engines
hey john, what is magnafluxing? sounds high tech.
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#11 |
Just hang'n around
Join Date: Nov 2005
Location: Camano Island WA
Posts: 248
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Re: decarbonizing and degreasing engines
You can try the hot water supply from your washing machine connection. Just hit the engine with hot water. Spray Simple Green all over it. Let it sit...long enough for your hot water tank to get hot again and then spray it off. Might need a stiff brush for the tuff stuff.
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Driving a '68 Chevy C20 and a '93 Astro Van. Lots and lots of mileage that I deduct each year. Last edited by Steelawork'n; 01-14-2006 at 09:51 PM. |
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#12 | |
Registered User
![]() Join Date: Aug 2001
Location: SOMERSET KY.
Posts: 6,427
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Re: decarbonizing and degreasing engines
Quote:
MAGNIFLUXING IS THE METHOD OF CHECKING FOR CRACKS USING A MAGNET, METAL DUST, & A BLACK LIGHT. ANY SMALL CRACKS THAT ARE NOT VISABLE TO THE NAKED EYE, SHOW UP THIS WAY. IT'S NOT EXPENSIVE OR HI-TECH. IT'S USUALLY $35 OR $40 IN MOST MACHINE SHOPS AROUND HERE TO HAVE IT HOT TANKED & MAGNIFLUXED . I WOULDN'T CONSIDER PUTTING ANY MONEY IN A BLOCK OR A SET OF HEADS UNTIL I HAD THEM TESTED. ![]()
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junkyardjohn 69 1 TON TOW TRUCK // 84 4WD CUCV BLAZER// 85 1 TON 4WD STAKE TRUCK// 86 M1031 5/4 TON 4WD CUCV// ALOT OF OLD TRUCKS FOR ONE OLD MAN TO DRIVE. ![]() LIFE MEMBER OF P.E.T.A (PEOPLE EATING TASTY ANIMALS) DON'T RENT U-HAUL ALWAYS TELL THE TRUTH IT WILL AMAZE PART OF THE PEOPLE & ASTONISH THE REST Last edited by junkyardjohn; 01-14-2006 at 10:16 PM. |
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#13 |
Registered User
Join Date: Apr 2001
Location: DALLAS,TX
Posts: 21,979
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Re: decarbonizing and degreasing engines
I used aircraft stripper for the carbon deposits on the piston tops. I turned the motor over by hand to get the pistons @ TDC & used a small paint brush to apply it.
Let it sit about 10~15 mins & scrape the 'sludge' away. Repeat as necessary & for the final application I used a green scotchbrite pad to get them pretty clean.
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67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... Cubic inches is like Indiana Jones with a cheap pistol. |
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#14 |
Registered User
Join Date: Feb 2005
Location: Bay Area, California
Posts: 995
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Re: decarbonizing and degreasing engines
Be careful not to let stuff "soak" on your wireing. I lost a few wires that way. My wireing was old to begin with and the engine cleaner ate right through it!
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1971 Chevy C10 Shortbed Stepside, 307v8 3-on-the-tree |
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#15 | |
Registered User
Join Date: Nov 2003
Location: Alexandria, VA
Posts: 1,534
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Re: decarbonizing and degreasing engines
Quote:
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'72 GMC SWB C1500 Custom, frame-off in progress. 383 SBC, 9:1CR, Comp Cams XE262H, Scat internal balanced crank, Eagle SIR 6" rods, Keith Black dish pistons, Dart Iron Eagle 72/180 heads, Weiand Stealth intake, Stewart stage I water pump, Holley 4bbl vac sec, TH350 with B&M Shift Improver Kit. 12 bolt positraction. ![]() ![]() ![]() |
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#16 | |
Registered User
![]() Join Date: Aug 2001
Location: SOMERSET KY.
Posts: 6,427
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Re: decarbonizing and degreasing engines
Quote:
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junkyardjohn 69 1 TON TOW TRUCK // 84 4WD CUCV BLAZER// 85 1 TON 4WD STAKE TRUCK// 86 M1031 5/4 TON 4WD CUCV// ALOT OF OLD TRUCKS FOR ONE OLD MAN TO DRIVE. ![]() LIFE MEMBER OF P.E.T.A (PEOPLE EATING TASTY ANIMALS) DON'T RENT U-HAUL ALWAYS TELL THE TRUTH IT WILL AMAZE PART OF THE PEOPLE & ASTONISH THE REST |
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#17 |
Senior Member
![]() Join Date: Apr 2001
Location: Alexandria, MN
Posts: 1,462
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Re: decarbonizing and degreasing engines
there was an article posetd on the board about a year ago, about a homemade hot tank set up with a 55 gal barrel, filling it 1/2 full of water and heating it with a small charcoal fire beneath it... then add a quantity of lime ??? and let the engine block/heads sit over nite in the hot solution... does someone have that post handy????
--Mike
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63 C20 2WD, 230/SM420/4.11 73K 68 C30 dump truck, 327,SM425,4.56 66K original 68 C10 2WD SWB Stepper, 250/3-tree/3.73 66K.... Wifes 68 Buick Skylark Custom Conv., 350/TH400/2.56 In our family since '79 69 GMC 1500 SWB 2WD, 350/TH350/3.73 posi... 70 K10 SWB 4X4 4-sp,ps, pb, tilt, buckets, console, sliding back window (Need AC parts) WIP 72 Chevy K20 4x4 350/350/205/4.56 donor 72 Vette 350/M21/3.70 posi, triple black and super fast 84 Olds Cutlass Brougham 350/2004r/4.11 was Dad's |
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#18 |
Active Member
![]() Join Date: Nov 2005
Location: Austin
Posts: 217
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Re: decarbonizing and degreasing engines
Hey Scoti,
Where do you get aircraft stripper? The paint store, or a model airplane store? |
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#19 | |
Registered User
Join Date: Feb 2000
Location: Center City, MN, USA
Posts: 3,254
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Re: decarbonizing and degreasing engines
Quote:
Like Scoti I rotate each piston to the top, spray it down, wait a few minutes, then carefully scrape the junk off. I also have the 3M roll-lock system. (I'm not sure if it is spelled that way but at the better auto parts store in town - not napa - I ask for more "roll lock" pads. The roll-lock pads make clean up of machined surfaces a dream. If the roll-lock system is bad for bearings, it takes more than 55,000 miles to hurt anything. I used the roll-lock system on my Escort block at 187,000 miles. I went by 242,000 last week.
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'70 cab, '71 chassis, 383, TH350, NP205. '71 Malibu convertible '72 Malibu hard top Center City, MN |
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#20 |
Registered User
Join Date: Dec 2005
Location: Spokane Washington
Posts: 85
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Re: decarbonizing and degreasing engines
I used ez off oven cleaner one time and soon as I rinsed it off everything turned to rust, right before my eyes! It was awfull, has anybody else had that happen to them?
CoolRide |
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#21 |
Registered User
Join Date: Nov 2003
Location: Alexandria, VA
Posts: 1,534
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Check out the link below...I saw this a year or so ago, and was shocked since I had used these too in the past.
http://www.gmgoodwrench.com/resource...Procedures.pdf
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'72 GMC SWB C1500 Custom, frame-off in progress. 383 SBC, 9:1CR, Comp Cams XE262H, Scat internal balanced crank, Eagle SIR 6" rods, Keith Black dish pistons, Dart Iron Eagle 72/180 heads, Weiand Stealth intake, Stewart stage I water pump, Holley 4bbl vac sec, TH350 with B&M Shift Improver Kit. 12 bolt positraction. ![]() ![]() ![]() |
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#22 | |
Registered User
Join Date: Apr 2001
Location: DALLAS,TX
Posts: 21,979
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Re: decarbonizing and degreasing engines
Quote:
When I scrubbed the tops of the pistons, I didn't get too aggressive & made sure to stay within the center of the piston & avoided the edges. I then wiped them down w/a shop rag soaked w/cleaner (all this while the engine was upside down to keep stuff from dropping down internally). I guess I should have explained myself more thoroughly.
__________________
67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... Cubic inches is like Indiana Jones with a cheap pistol. |
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#23 |
PROUD TO BE A MEMBER
Join Date: Sep 2005
Location: Jax Florida
Posts: 234
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Re: decarbonizing and degreasing engines
TANKING also cleans water jackets ,i like tanking the crank also to clean inner oil lines .ps a life time ago that was my job when not delivering parts at a large parts shop that rebuilt motors
btw i took the motors apart nuts /bolts everything small went in baskets larger basket was for the heads and crank shaft the block went on a chain after the freeze plugs with pulled . after boiling 5/6 hours pulled and washed off out back this was the way in late 1950 but EPA stopped all that by now it was just washed in the ground , starters and generators went the same way then rewaped the firlds and sold as rebuilts laffin i am so old i can rebuild a flat head ford with a quarter inch stroke LOL Last edited by _Dick_; 01-16-2006 at 09:27 PM. |
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#24 | |
Registered User
Join Date: Nov 2003
Location: Alexandria, VA
Posts: 1,534
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Re: decarbonizing and degreasing engines
Quote:
__________________
'72 GMC SWB C1500 Custom, frame-off in progress. 383 SBC, 9:1CR, Comp Cams XE262H, Scat internal balanced crank, Eagle SIR 6" rods, Keith Black dish pistons, Dart Iron Eagle 72/180 heads, Weiand Stealth intake, Stewart stage I water pump, Holley 4bbl vac sec, TH350 with B&M Shift Improver Kit. 12 bolt positraction. ![]() ![]() ![]() |
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#25 |
Active Member
![]() Join Date: Nov 2005
Location: Austin
Posts: 217
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Re: decarbonizing and degreasing engines
CoolRide: My head is already getting tiny spots of surface rust after I scrubbed it down with simple green a few days ago. I need to hurry up and either get it to the machine shop or sop some clean motor oil on it.
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