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This is a discussion thread titled "Carbon removal", within the Engine & Drivetrain forum, part of the Technical & Vehicle Assistance Forums category.


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Old 11-06-2003, 04:18 PM
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Default Carbon removal

What is the accepted method for combustion chamber deposit removal.
Cleaner thru vacuum line or through fuel rails. My local dealer has talked with Toyota and most spark knock problems are all going back to deposits in Combustion chamber or on piston. Is the Tundra V8 more susceptable or is the gas these days that lousy. Do you run a risk of o2 sensor damage? Dealer will charge $75 for procedure and clears spark knock about 20,000 miles.

Which cleaner is reccomended...seafoam...techron...I would like to hear from some mechanics if possible
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Old 11-06-2003, 10:22 PM
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Quote:
Originally Posted by flyfish
What is the accepted method for combustion chamber deposit removal.
Cleaner thru vacuum line or through fuel rails. My local dealer has talked with Toyota and most spark knock problems are all going back to deposits in Combustion chamber or on piston. Is the Tundra V8 more susceptable or is the gas these days that lousy. Do you run a risk of o2 sensor damage? Dealer will charge $75 for procedure and clears spark knock about 20,000 miles.

Which cleaner is reccomended...seafoam...techron...I would like to hear from some mechanics if possible
Before I rebuilt an engine that had savvier engine deposit problems with savvier engine knock I ran a few bottles of TL3 engine deposit remover in the gas tank to test it’s effectiveness out. It removed about 80% of what was there so it should work good for mild deposits. I don’t remember the names of the cleaners but when I was a GM technician I cleaned my car deposits with a system were you run the engine right off the cleaner itself by disabling the fuel system and hooking up a device that allowed you to run the engine off the cleaner. It worked very well! Running off a vacuum line might not give you even coverage and if you allow too much to enter the vacuum line you run the risk of hydro locking the engine.
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Old 11-06-2003, 11:17 PM
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BG 44K gets good reviews
http://www.bgprod.com/bgconsumer/bgservices/44k.html


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Old 11-07-2003, 01:19 PM
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Quote:
Originally Posted by v8Toilet
...when I was a GM technician I cleaned my car deposits with a system were you run the engine right off the cleaner itself by disabling the fuel system and hooking up a device that allowed you to run the engine off the cleaner. It worked very well!
This is the best method of cleaning the engine. It's much more effective than gas additives as you can use *much* harsher cleaners and you don't have to worry about damage to weaker components and seals that aren't intended to see these cleaners. The downside is the cost.

A good option is to use an effective cleaner with every oil change (at least). I've used BG, Redline, Amsoil, Valvoline, and Techron products and I've been very happy with the results over time.

Cleaning deposits is kind of a "stitch in time" process. It's much easer to clean deposits while they weakly established (with a weak cleaner) than after they have built up some.

For best results let the tank get down to about 12 gallons and then add the additive and run it as close to E as you can. A better way is to empty it, add the additive, then add 12 gallons. But it will mix eventually either way.

Once you add the cleaner, try to empty the tank pretty quickly. I'll often dump cleaner in on the first tank when I take a longer trip. Then it's gone pretty fast.

Alan
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