Topic: Best way to remove carbon from valves? (Read 28043 times)

jdmhatchracer94 · « **on:** March 19, 2009, 11:39:46 AM »

What is the best was u use? I used a wire wheel on a drill press. Did pretty well except I can't get all the cardon off he valve face what do u use? Chemicals? Another tool?

Is it a bad thing if you take the coating off the face of the valve? I tried a dremel with a sanding disk and it went straight to the metal.

Foowee · « **Reply #1 on:** March 19, 2009, 12:00:04 PM »

I've been told getting them really hot then quenching them will make the stuff pop right off. I haven't done this myself. So if you got a junk head laying around try it on the stuff you ain't gonna use.

In my vitara d, I used 120 grit aluminum oxide blast media. It ate the carbon like a snack. Then I coated them with techline cbc-1:

http://www.techlinecoatings.com/

http://techlinecoatings.com/hi-performance/pdf/internal-engine-coatings.pdf

Next time before you take the engine out of the running car. Get a spray bottle of distilled water and spray it in your tb while the car is running(keep the revs around 3k) to remove the carbon...

chris · « **Reply #2 on:** March 19, 2009, 01:26:42 PM »

Soak head in purple power for a couple hours. Power wash for 10+ minutes to get the looser stuff off.

chris · « **Reply #3 on:** March 19, 2009, 04:00:31 PM »

I build hondas I have never touched a v8 block in my life. Dont let it soak for days and your fine. Purple power is pretty strong stuff give it an hour or two soak and then powerwash the shit out of it. 90 percent of the nasty stuff will be gone.

Use your local car wash to power wash engines/heads

jdmhatchracer94 · « **Reply #4 on:** March 19, 2009, 05:36:45 PM »

thats exactly how I cleaned my head soaked it in purple clean and oil eater the greasy build up few right off. It's the hard carbon I can't get off. I have 80 grit aluminum oxide media but didn't know if that was to strong for the valves.

92CXyD · « **Reply #5 on:** March 19, 2009, 05:50:13 PM »

I use a brass wire brush on a drill works wonders. ;D

jdmhatchracer94 · « **Reply #6 on:** March 19, 2009, 05:51:35 PM »

I used the wire wheel but it doesn't get all the shit off the face. I dunno fuck it will figure it out.

chris · « **Reply #7 on:** March 19, 2009, 05:58:36 PM »

You have a bench grinder has complex pointed out with a nice size wire wheel bye bye carbon

jdmhatchracer94 · « **Reply #8 on:** March 19, 2009, 06:12:35 PM »

ok so use a stiffer wheel I just have the brass wheel

ryan89crx · « **Reply #9 on:** March 19, 2009, 06:12:48 PM »

on one of my sohc motors it had been burning oil and the carbon buildup on the valves was too tough for even a 6" bench grinder with wire wheel. ended up using a media blaster instead. worked like a charm

TTC · « **Reply #10 on:** March 19, 2009, 07:18:40 PM »

Painters brush and carb cleaner will melt carbon off without any mechanical bullshit like grinders.

jdmhatchracer94 · « **Reply #11 on:** March 19, 2009, 08:26:41 PM »

coarse like the wire brush

jdmhatchracer94 · « **Reply #12 on:** March 19, 2009, 10:59:46 PM »

Just bought a new wire wheel worked fuckin tit's geuss the other one is worn out

ratcityrex · « **Reply #13 on:** March 20, 2009, 05:59:51 PM »

I just used a NEW fine wire wheel on my bench grinder and it worked good for me.

patsmx5 · « **Reply #14 on:** March 22, 2009, 08:44:46 PM »

As mentioned, wire wheel on a bench grinder > *.

And you're doing it wrong. Chuck the valve in the drill press and then use sand paper or a wire brush to get the carbon off. I undercut and backcut my valves spinning them in a drill press and using a file, dremel, rough sand paper, then fine sand paper. Polished undercut light weight valves for free =

crttaz · « **Reply #15 on:** March 23, 2009, 04:14:48 AM »

soak in carb dip, easy for the past 50-60 years.

turbob16hatch · « **Reply #16 on:** March 23, 2009, 04:54:27 AM »

when i rebuild my old head on a cheap, i used this product called chem-dip. It is a gallon paint can that has a solution in it and a little metal tray. you just set the valves in the tray and close the lid, come back after a good amount of time (over night for me) and bam there brand new looking.

92CXyD · « **Reply #17 on:** March 23, 2009, 07:40:33 AM »

Quote from: 91jdmhatchback on March 23, 2009, 04:54:27 AM

when i rebuild my old head on a cheap, i used this product called chem-dip. It is a gallon paint can that has a solution in it and a little metal tray. you just set the valves in the tray and close the lid, come back after a good amount of time (over night for me) and bam there brand new looking.

+1 then I chuck them up on my drill press and sand and polish the valve taking care of not damaging the seat face.

7808 · « **Reply #18 on:** March 23, 2009, 11:55:35 AM »

never tried it on vlaves but...

http://www.aircooledtech.com/tools-on-the-cheap/soda_blaster/

http://pablaster.com/

or do like i did and drop $10 on
http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=96972

and a few bucks on hose and stick the end in the soda, or whatever, they sell walnut shells and glassbeads at HF too. and the right kind of (armex) soda for blasting. i heard you can just use powder laundry detergent too

Logan76 · « **Reply #19 on:** March 24, 2009, 12:06:10 AM »

I never heard of using powder laundry detergent as a media, thats intresting.

7808 · « **Reply #20 on:** March 24, 2009, 12:20:34 AM »

im gona try it on some motorcycle parts, i did some shopping

50lb bag of sodium bicarb for blasting is $30 at HF (they actually use namebrand armex shit)

large buckets of generic laundry soap powder costs $18 for 40lbs and is easier to get. and i dont have to go to HF.

the soap is made from sodium carbonate. baking soda is sodium bicabonate. not sure if there will be any negative affects. as usual im willing to wreck my shit finding out

danz · « **Reply #21 on:** March 25, 2009, 09:13:17 PM »

paint thinner, xylene, etc.

crttaz · « **Reply #22 on:** March 26, 2009, 02:19:26 AM »

Berymans Chem Dip, just old school carb dip.

What is insode you ask?

http://en.wikipedia.org/wiki/Dichloromethane

crttaz · « **Reply #23 on:** March 26, 2009, 02:28:56 AM »

before

after

only used a small brass scrub brush

chris · « **Reply #24 on:** March 26, 2009, 02:04:15 PM »

Quote from: crttaz on March 26, 2009, 02:19:26 AM

Berymans Chem Dip, just old school carb dip.

What is insode you ask?

http://en.wikipedia.org/wiki/Dichloromethane

any national stores carry the stuff?

chris · « **Reply #25 on:** March 26, 2009, 02:44:15 PM »

Never noticed it before Ill give it a try

chris · « **Reply #26 on:** March 26, 2009, 03:02:04 PM »

Im not suppose to drink it?

crttaz · « **Reply #27 on:** March 26, 2009, 05:16:11 PM »

I heard is cures herpes, Hotrex needs to confirm this.

chris · « **Reply #28 on:** March 26, 2009, 05:29:49 PM »

Quote from: n/a mike on March 26, 2009, 05:17:50 PM

Quote from: chris M on March 26, 2009, 03:02:04 PM
Im not suppose to drink it?
i don't know, i didn't read the directions or the warnings.
i was just repeating what the guy working at vatozone 5 years ago told me when i bought it.

Cool Ill drink some tonight

92CXyD · « **Reply #29 on:** March 26, 2009, 06:36:45 PM »

Quote from: n/a mike on March 26, 2009, 02:58:57 PM

looks like this

not trying to sound like you mom, but
make sure you read the directions and warnings.

I have three cans of that stuff using the same cans for 6 yrs. now ;D

News:

Author Topic: Best way to remove carbon from valves? (Read 28043 times)

chris

chris

chris

chris

chris

chris

chris