What tool/equipment set up do you use for blasting ?
Direct Inject Cleaning solutions
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Who would have thought the Ole Rotunda 014-00975 (walnut media) carbon blaster and boroscope kit from the early nineties might have relevance today.
I remember Ford TSB 93-12-6. The detergents in the fuel along with the natural ability of the gasoline anyway to act as a sort of cleaning solvent spraying on back of valves helped clean the oil mist off the back of the hot intake valves before turning into tar, then further baking into hard carbon deposits. IMO Lower tier gasoline use was not actually the root cause of the carbon build up, IMO it's basically sh@tty engines with extended oil change intervals getting a lot of blowby and oily mist from the crankcase ventilation system baking on to the back of the intake valves. Seemed to me I was able to "Have at it " on the back of the intake valves seated with intake manifold removed using screwdrivers some assorted dental pick set , blow nozzle , and throttle body, and cleaned the carbon off intake valves of an 08 Passat Turbo fineAttached FilesComment
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That kind of carbon buildup on the valves has been around since before the days that PCV systems even existed (circa mid 60's). It occurred back in the days of points & condensers & carburetors.
The fuel injection systems and the PCV systems don't cause it. The TBI & Port injection systems lasted longer, the problem arose because valve jobs & engine rebuilds didn't happen as often like they did back then (an engine lasting longer than 60,000 or 80,000 miles was rare), the better fuel quality (as early as 1988....long before Top-Tier fuels) helped keep the backside of the valves clean.
Now with GDI that strategy doesn't keep the valves clean anymore because the fuel doesn't get there.
Things come full circle.
The GDI engines are seeing this kind of problem around 60,000 miles....again....
The more things change, the more they stay the same.Comment
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I bought mine at princess auto(similar to harbour freight) and have modified it as required for different engines.I also had to make an adapter for my shopvac.In time something better will come along,but this works for now.Comment
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This came up on another forum I belong to, I'm sure GM's are not as critical as Euro-junk but its a thought.
Correct spark plugs and correct torque are needed for proper spark plug indexing. Another member of the forum stated that incorrect indexing can lead to the plug actually being eroded by the high pressure fuel because the injector can spray directly onto the tip of the plug.
Just another thought.Comment
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Correct spark plugs and correct torque are needed for proper spark plug indexing. Another member of the forum stated that incorrect indexing can lead to the plug actually being eroded by the high pressure fuel because the injector can spray directly onto the tip of the plug.
Just another thought.
I also remember F'N up and setting the valve lash in thousandths of an inch instead of hundredths of mm and wondering why the engine sounded noisier than normalComment
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I just got an email from ATS about their new GDI carbon cleaning machine. Not sure of the cost, being it’s from ATS I’m sure it’s not cheap but their product are always good
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I checked out ATS's website and they posted an msrp of $4895 for that unit. My shop budget wouldn't include that even if you moved the decimal point over one notch!Comment
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Yeah I checked out the price after posting the link. My shop is not buying it either, price is very steep but like I said their products are always very good. I've looked at a lot of these machines and haven't seen one that worked well yet, but being its from ATS I'm sure this one works.Comment
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If I read the web site correctly the machine is $2400. The $4800 includes 12 cases of the chemicals, enough to do 48 vehicles at $50 a piece. https://atschemicals.com/calculator.html
I bought the Blue Point injector cleaner years ago. An injection service can be a tough sell as regular maintenance unless your sure it's going to solve a driveability problem and give the customer a noticeable improvement in performance.
I would also be a bit concerned about what codes get set during the cleaning process and what adaptives need to be relearned, fuel composition, fuel trim, etc.Comment
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Think if it were my own Turd I would remove the intake manifold and clean the valves , and while the intake is out figure out the best place to stategically drill and tap the runners to thread in and JB weld little vacuum ports at an angle that I could pop off rubber caps and take a look in with a small diameter sewer camera every 30K. Wonder if Suzie Homemaker ever thought of strategic shot of EZ off oven cleaner on the back of the valves to let it soak overnight to soften the deposits , followed by sea foam, then change oil and filter , spark plugs, then a gallon of pure lacquer thinner in the tank to 10 gallons of gas for a quick Cat fix per Scotty K. Maybe Dorman will sell aftermarket intake manifolds with a removable valve port access plates with gasketsComment
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Looks like you could get a basic walnut blasting unit and 20 lb of walnut shells for around $300, which is getting closer to my small budget. Anybody have concerns about residual walnut shells stuck in the combustion chamber causing damage?Comment
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The point of using walnut shells is that if a small amount gets in the cylinder it shouldn't cause damage. I take the time to make sure the valves are closed and made an adapter for my shopvac that seals tightly over the intake port to suck out the debris.Comment
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