Clean carbon build up in engine

[dk1975]

Has anyone tried removing carbon build up in your engine using water?
I don't understand this instruction "connecting a vacuum hose to a port at the base of the throttle body and sticking the other end of the hose into the bottle of water." Can someone give me a picture or diagram about where/which hose I should connect on a car with 1MZFE and another with 5S-FE engine.
http://www.hotrodder.com/kwkride/tech.html

You Tube

You Tube

links

links

Thanks

[Mike Gerber]

I would avoid using this method. It's just too risky IMHO. I used it myself many many years ago with big old V8 carburetor fed engines, but as your link said this can be dangerous today. Water can not be compressed like the fuel and air mixture. It can literally hydra lock your engine if too much water is sucked in through the vacuum line, causing major internal engine damage. I believe there are chemicals today that can be used to clean carbon out and they should be safer for your engine. Go to the local auto parts store and ask there what they recommend. Many people on this forum have used Seafoam for this purpose. I don't know if that's available in Australia. Do a search for "seafoam' on this fourm and read up on the procedure.

Mike

[AlmightyCamry777]

A healthy engine does not need to be cleaned of carbon. Modern fuels and lubricants do a good job of keeping it from building up. also engines run hotter then they used to, 195 degrees F vs the older cars from the 1970's that ran at 180 degrees F.

I have disassembled many modern engines and carbon was a slight problem, indeed. I disassembled my old 1988 Nissan pickup with Z24 engine to do a valve job, hone the cylinders and change the rings. There was very little carbon on the rings and valves, and it took me maybe 20 minutes to clean all 4 pistons of residue (most of the residue was varnish, like i said, VERY LITTLE carbon.) This engine had 280,000 miles on it.

DO NOT PUT WATER in your engine! There's no need to! And you risk compressing water instead of fuel vapor in a cylinder. If that happens you are going to blow rings or valves or something else, maybe even your head gasket. If you have to worry about carbon in your engine, something else is wrong (bad valve stems, bad rings, misfiring spark plugs or injector overfeeding etc.).

I'd sea-foam the intake system per a search result here and call it good. Forget about carbon, it's a non-issue. Use of an additive like Chevron techroline every so often should remove any slight build up.