Can you buy that?hemachayart wrote: ↑Fri Mar 27, 2020 3:33 pmSpray, Ethylene Glycol into port in this picture. It will be white smoke come out after start but it's ok.
I did the walnut shell blast after loosening the deposits with a good soaking of B12. Finished the job with one of those metal dentist picks to remove the ring of gummy carbon left behind on the valve seats.
Fuel additives or top tier fuel will not help a bit for this problem. Fuel does not flow over the valves or through the ports.Malbec 56 Beast wrote: ↑Sat Apr 25, 2020 4:49 pmBG44k is awesome stuff
Oil changes fuel and opening it up can help keep this buildup down. 3M makes a great fuel additive that works great
Andy
Yea direct injection sucks for carbon buildup. Even my stock port injected 3.5HR was far from clean at 178K miles when I did the plugs. I had to do the valve covers today at ~216K. I have been running revised cam timing maps with much less cam overlap than stock for about 5,000 miles in that car with the free flowing exhaust. I have used Techron a few times this year which actually gets to the ports and valves. On that port fuel injected engine this was what greeted me today.
I get you.
Since it's resurrected, I'll put my two cents in. Glycol works great, but it has a surprisingly low flashpoint (actually lowest on the whole car). It can flash in your intake and make a mess. The best, safest stuff for decarboning is a teaspoon of ATF (any kind works). Feed it down any vacuum port, with the engine fully warm and revved about halfway to redline by an assistant. The vapor films on the surface of the carbon and the sudden temperature differential blows it apart. Squeaky clean in 5 seconds flat, no risk of flashback, and unless you're running cat-less, no cloud to annoy the neighbors.hemachayart wrote: ↑Fri Mar 27, 2020 3:33 pmSpray, Ethylene Glycol into port in this picture. It will be white smoke come out after start but it's ok.
I bought these awhile back when I was trouble shooting my P0087, P0300 and P0304 trouble codes. post6814737.html?sid=36cf7a6a0fe8993ee3 ... 4#p6814737
So, same application method as Seafoam. I'm inclined to try this...lol. Way easier than all of this stuff...VStar650CL wrote: ↑Tue Feb 23, 2021 5:57 pmSince it's resurrected, I'll put my two cents in. Glycol works great, but it has a surprisingly low flashpoint (actually lowest on the whole car). It can flash in your intake and make a mess. The best, safest stuff for decarboning is a teaspoon of ATF (any kind works). Feed it down any vacuum port, with the engine fully warm and revved about halfway to redline by an assistant. The vapor films on the surface of the carbon and the sudden temperature differential blows it apart. Squeaky clean in 5 seconds flat, no risk of flashback, and unless you're running cat-less, no cloud to annoy the neighbors.hemachayart wrote: ↑Fri Mar 27, 2020 3:33 pmSpray, Ethylene Glycol into port in this picture. It will be white smoke come out after start but it's ok.
Learned it from a clever Italian boss running the gas station where I got my first wrenching job. Back in bad old prehistory, small block Chevys with grandma drivers could build up carbon 1/2" thick on the backs of the intake valves. They'd come in with a miss that would show up as poor compression. Pre-catalysts, you could stand behind the car and watch quarter-sized chunks of carbon fly out the tailpipe when the ATF went in. Customers who chose to watch would often blanch, like, "Did that really come out of my engine?"
Oh man I love this stuff! I'm going to perform this procedure this weekend or sooner.VStar650CL wrote: ↑Tue Feb 23, 2021 5:57 pmSince it's resurrected, I'll put my two cents in. The best, safest stuff for decarboning is a teaspoon of ATF (any kind works). Feed it down any vacuum port, with the engine fully warm and revved about halfway to redline by an assistant. The vapor films on the surface of the carbon and the sudden temperature differential blows it apart. Squeaky clean in 5 seconds flat, no risk of flashback, and unless you're running cat-less, no cloud to annoy the neighbors.hemachayart wrote: ↑Fri Mar 27, 2020 3:33 pmSpray, Ethylene Glycol into port in this picture. It will be white smoke come out after start but it's ok.