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Removing Carbon From Piston, Cylinder Walls, and Block Deck


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Published: 2 years ago
Today I am removing carbon buildup from combustion chamber, the tops of the pistons, and removing debris from the engine block deck. If these areas are not clean, it can lead to hot spots in the cylinder, and a poorly sealing head gasket. I am using WD-40® Trigger Pro® and Scotchbright pads. Visit the blog ~ http://humblemechanic.com/?p=6253

Support for this video was provided in part by WD-40®.

WD-40® on Amazon ~ http://amzn.to/2aQsd5C
Scotch bright Pads ~http://amzn.to/2aQpb1u
Gasket Scraper ~ http://amzn.to/2aQuNcn

Join me today as we:
~Remove debris from the head gasket surface
~Remove carbon buildup from the top of Pistons
~Remove carbon from tops of the cylinder bore
~How to take care NOT to damage cylinder wall
~Inspect for cross hatching of cylinder
~When to take engine block to machine shop
~and more

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comment  Comments

What do you mean by " hot spots in the cylinder"?

2 days ago

Soaking in paraffin / kerosene overnight will dissolve that carbon and make it easier to wipe away with minimal effort using your method.

4 days ago

I would, still, get them remaining spots out on the first run.

Professional pride, perhaps?..

5 days ago

It ended up coming totally apart anyway due to issues in the connecting rod bearings

5 days ago

I would like to join with you

1 week ago

Can i join ?

1 week ago

Man I've WD-40 for a lot of shit but dam I never thought to use it for this. That's fucking brilliant

2 weeks ago

Some people still believe cleaning the top of the pistons will lead to smoking once the engine is back together.

2 weeks ago

Didn't the White Wookie get a rebuilt engine not so long ago? I'm confused.

2 weeks ago

+HumbleMechanic makes sense.

2 weeks ago

This is that engine. I ended up finding some sadness on the rod bearings and went full rebuild

2 weeks ago

Hello there, I was wondering on how you learned to be a mechanic? Can you give any advice on the best route to take if I want to learn literally everything on being a mechanic in the most efficient amount of time. Thank you

2 weeks ago

Damn bro, get to the point!! 4 minutes in and you still haven't showed how.. if you need to tell them every bit of information about a block then they shouldn't be doing this.. they should already have some knowledge of what a block is.

3 weeks ago

Well said.. and yes I'm using your method.. so don't feel like I'm a hater or a troll.. it just took so long lol.

3 weeks ago

I try not to assume what people know. If I have an opportunity to explain, I try to take it. We all learned this stuff at some point.

3 weeks ago

Wouldn't toothpaste work to get the carbon off if you also use a firm toothbrush?

3 weeks ago

It very well may. I’ve never tried.

3 weeks ago

The one time that I'd be thankful to have a 4-cylinder engine. Less work...

3 weeks ago

Toothbrush and gasoline!

3 weeks ago

Great Job.

1 month ago

Are you telling me that a can of Gumout won't clean your cylinder top spotless like Scotty claims? XD

1 month ago

😎 it may. But I’m not thinking so lol

1 month ago

Why doesn’t dw40 do a treatment to put into the fuel tank if it’s as easy to remove carbon as your doing with a scotch green pad

1 month ago

Love it. Great video

1 month ago

Is that what a vr6 2.8 head looks like? Cool.

1 month ago

easy off oven cleaner

1 month ago

No way that was magic. never seen it come off that easy. My wife has more work with the dishes.

1 month ago

I got 3 partly full cans of wd40 that will not spray. Tell them to send me a can!!

1 month ago

give them a ring, maybe they will hook it up

1 month ago

Awesome video showing exactly WHAT NOT TO DO! Seriously dude... Scotchbrite pad? Using a carbide gouge, to gouge the deck, while simultaneously warning against doing it! This is comical shit!
Classic case of "Dunning Krueger Syndrome" that explains why incompetent people often view & portray themselves as highly competent (Incompetent people can't know that they're incompetent, because they lack the knowledge to even know that they're incompetent, where if they did possess the knowledge to know that they're incompetent, then they would not be incompetent)... This video has 1M views because we're all cringing & sharing a classic example of stupid people doing stupid shit & pretending they know what they're doing...

1 month ago

As a machinist, DO NOT use an air or electric powered grinder / sander with a roll lock disc! You can not keep the disc straight when sanding. You always end up with low spots in the deck surface or rounded corners of water jackets and bores!

1 month ago

Yep, made that mistake with my Oldsmobile alero 10 years ago. Just bought a new 2017 Honda HR-V in 2017 and will only clean the engine as this guy has stated in the video when the time comes. 148,000 miles in, and it runs like a champ.

3 weeks ago

My question is, say you're doing this and slap a new gasket back on. Will WD-40 on the pistons and inside the cooling channels (I think they are) cause an issue or would a fluid change suffice once some cycles through?

Never done this before, but just in case it'd be nice knowing that bit.

2 months ago

This this engine ended up with some bearing damage on the connecting rod bearings. I ended up with a full rebuild. had I not, I would have cleaned the cylinders out, oiled them and ran it.

2 months ago

Just use vegetable oil to cover/soak all carbon covered parts over night. In the morning wipe it all off with clean rags. No scrubbing... unless you would like to have shining piston tops.

2 months ago

no kidding? That is awesome.

2 months ago

I picked this tip off some forum about toyota diesels. They also were talking about "old time" machinists using vegetable for cleaning hands after work.
Since the head off my 3.0 toyota diesel had to come off and time was not an issue - i decided to give it try. If it didn't work im down glass of veggie oil and a couple of rags...
It also worked well on head's surface facing combustion chamber. The carbon which was "baked" on intake valves it did not work...

2 months ago

Really? That's kinda awesome. I have an engine down now. I am gonna try it.

2 months ago

paid advert????!!!!!!!????? red flag, abort viewing immediately.

2 months ago

Yeah it's crazy that Youtube video creators want to get paid for the work they do. Just like most people when they go to work.

2 months ago

4:45 Is that green pad the same coarseness as the ones you get for washing dishes?

2 months ago

Can you clean the cylinders by allowing some water to get sucked into the air intake when the engine is running?

2 months ago

Please do not use scotch brite scrubber. They have silica particles in them which will get into the space between the cylinder wall and the piston and also into the ring grooves and on the first start after assembly will screw up the cross-hatch pattern on the cylinder walls.

2 months ago

too much talking, not enough working

2 months ago

Very informative. Thank you.

2 months ago

Talk to much for nothing

2 months ago

hey whats up im kevin from boston where can i get those windshield wiper blades i saw in 1 of your videos

2 months ago

Is this the guy from Grease Monkey garage show?

3 months ago

How do you re align those pistons properly after rotating them like that before putting the head back on??

3 months ago

+HumbleMechanic Oh, interesting. I presume that taking a picture of the marks before rotating the pistons would help. I'm about to do this for the first time on a 2003 1.8T Passat.

3 months ago

There are marks on the crankshaft pulley

3 months ago

im a mechanic and i never saw an engine had carbon built up on pistons

3 months ago

Poor maintenance, low quality fuel, not reaching high RPM.

3 months ago

Wedge engines. Huh?

3 months ago

VR6

3 months ago

I'm "honing my own cylinder" tonight. :(

3 months ago

WD-40's ok, but I find that ATF cuts through carbon even better.

3 months ago

We got a more convenient and more easy to operation for Removing Carbon from Cars, you can take a look here:http://aliurl.cn/0hduv4

3 months ago

Man you look so familar. I swear i know you from some where other than this channel

4 months ago

I am not a mechanic although I worked on my own cars in the 70's and 80's. Here is a tip I always remembered from my father. You can build a grease dam around each Piston crown at the sleave when removing carbon. This will help with debree getting down between the crown. Then when done move the Piston a little down and wipe the wall and piston clean.

4 months ago

That's a great tip, I'm doing it now on my old Lada Riva, thanks.

3 weeks ago

Fuck me that's one helluva smart trick! I had my engine head off and wanted to clean the block whilst it was still in the bay. After a bit of scrubbing I realized I got a shitload of debris and scotchbrite pad material down in the channels and around the piston rings. But then I noticed the block was junk anyway so I took it off and junked it. But next time I'm doing the block still in the car, I will use your dad's method!

2 months ago

Aluminum gasket mating surfaces suck because they gouge just by looking at them. I like cast iron.

4 months ago

I did not know WD removes carbon. Thank you.

4 months ago

Yeah it did better than I expected it to . LOL

4 months ago

I love how 95% of people who have posted NO informational posting on auto repairs chirp up about someone else's shortcoming after sitting back int their Directors chair pointing every little thing "wrong" with this post. Sweep off your own front porch and thanks for posting Charles.

4 months ago

Question: I know that you have said in past videos that carbon "cleaners" may or may not work and should be treated more as a preventative or to slow down the carbon build up on the VW engines. I have a 2008 VW GTI w/FSI, what do you think about Yamaha Ring Free? Would you recommend it, since I hear from diesel owners that have carbon build up that after using the product they do see an improvement over all. What do you think? Have you used it before?

4 months ago

I dont understand why you wouldn't remove the pistons and replace the rings at this stage 😥

4 months ago

I ended up doing exactly that because I found some bearing damage on one of the rod bearings

4 months ago

@HumbleMechanic How do you feel about using methanol/water 50/50% mix as a way to clean your engine. Imagine 140k miles then adding on the methanol/water kit I imagine it would clean up the carbon overtime.

4 months ago

It can work for light cleaning. Sadly people wait too long and expect a miracle.

4 months ago

Very easy way for try it at home

4 months ago

Please blink while you talk

5 months ago

You can hide snacks in it and eat em later!

5 months ago