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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

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!

6 hours 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 days 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.

1 day 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.

3 days ago

no kidding? That is awesome.

3 days 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...

3 days ago

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

3 days ago

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

4 days 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.

3 days ago

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

1 week ago

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

1 week 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 weeks ago

too much talking, not enough working

3 weeks ago

Very informative. Thank you.

3 weeks ago

Talk to much for nothing

4 weeks ago

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

4 weeks ago

Is this the guy from Grease Monkey garage show?

1 month ago

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

1 month 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.

1 month ago

There are marks on the crankshaft pulley

1 month ago

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

1 month ago

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

1 month ago

Make your own WD-40 with vegetable oil and acetone. I use approx 70% veg oil and 30% acetone mix, put it in a spray bottle. Works really well and saves you $$, the vegetable oil is environment friendly and the acetone will evaporate so much cleaner than a petroleum based product. I read about a college study that was done and this is what they came up with.

1 month ago

Interesting! I will have to check that out. THANKS!!!

1 month ago

Wedge engines. Huh?

1 month ago

VR6

1 month ago

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

1 month ago

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

1 month 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

2 months ago

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

2 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.

2 months 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!

3 weeks ago

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

2 months ago

I did not know WD removes carbon. Thank you.

2 months ago

Yeah it did better than I expected it to . LOL

2 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.

2 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?

2 months ago

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

2 months ago

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

2 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.

2 months ago

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

2 months ago

Very easy way for try it at home

2 months ago

Please blink while you talk

3 months ago

You can hide snacks in it and eat em later!

3 months ago

I prefer to use a wire wheel on the cordless.

3 months ago

Old tooth brushes can be used instead of scotch bright right?

3 months ago

I did this with a Knife !!!

3 months ago

How I love the sweet smell of WD-40 in the morning...

3 months ago

I just had the head off my BEW TDI and did this. I noticed on two of my Pistons it appeared to have a mark from the valves like it had hit the Pistons at one point. What would cause this?

3 months ago

Might as well just use sandpaper!! You should do a follow up to see if that engine is still running

3 months ago

Great video! If you were to apply the "Gadgetman Groove" to the carb/throttle body, you would get COMPLETE combustion resulting in the cleanest engine you've ever seen! EMISSIONS being lowered to almost if not ZERO, horspower increased, average increased mileage for vehicles is 37%! Lower temperatures all around, extended oil life. The list goes on for this simple mod! Call me sometime and ask how it works everytime. Michael @ Gadgetman Technologies. (763)-220-9712
Official website* http://gadgetmangroove.com/?atid=42

3 months ago

Could you clean your rims with this ?

3 months ago

can i put it inside the spark plugs holes for a night instead of sea foam to decarbonize engine ???

3 months ago

The cross hatching is visible only on fresh motor, & it will be polished by piston rings during break-in.
The cylinder wall should be smooth like mirror.
I dont know why 140k miles engine has cross hatching ??

3 months ago

How to check piston is faulty

3 months ago

All I have to say is thank you so much. I have never been able to clean the top of pictures as well as you did in this video. I know this is an older video and you might not ever see my comment but I still wanted to thank you for sharing. I also love that WD-40 spray bottle. I could not even guess how many times I have sprayed myself in the face with the aerosol can. Again thank you for your time all sharing this with all of us and it will definitely come in handy for me. I have 2 Motor jobs sitting outside my garage and I'm definitely using your technique.

4 months ago

Thanks so much!!

4 months ago

DUUUDE... so much fluff!! get on with the repair already... i am at 4:30 of you just repeating yourself about the damn wd40.. we already know you are using the non-aerosol version.. cool idc...

4 months ago

Do you have any ideas how to DUI DIY on resurfacing a head gasket cylinder block

4 months ago

So satisfying

4 months ago

Good morning, if I wanted this type of work done on my engine how would I go about asking my dealership to do this work for my car?

4 months ago

Appreciate it

4 months ago

Unless you’re doing other work like a head gasket, it’s probably not worth the cost

4 months ago

Nice!

4 months ago

Can engine oil be used instead of wd40?

4 months ago

I used a very small squar of scotch brite the size of my thumb for piston tops and cylinders. I really wouldnt even recommend that. Because when the scotch brite pad dust drips onto the piston rings, it will damage them and score the cylinder

5 months ago

Would CRC Intake Valve Cleaner work on this? It cleans the valves pretty well but what about everything else?

5 months ago