I spoke to the local German car mechanic this morning. He said he use to do walnut blasting..... but now he swears by the the Wynn's De-Carbon foam. I'm not sure where to get that here in the USA.....but I'm looking to give it a try for my persistent Misfire Cylinder #3.

Does anyone know where to get that in the US? Anyone have any good luck with this product?

 

hi before you spend $$$$$$$$$$$ The carbon problem doesn't apply to these engines only the turbo Cooper S N14/N18 ENGINES which had direct cylinder injection these normally aspirated engines N12/N16 ENGINES dont have direct injection....i wasted a fortune on Seafoam and all that crap which mad no difference lol....so the carbon build up problem does not apply can still build up carbon but not to the extent of causing our symptoms

 

Looks like these guys have it for sale:

http://injectedstore.com/products/in...de-carbon-foam

If you try it be sure to report back. Sounds like you need to inject it as close to the cylinders in the intake hoses as you can.

 

The mechanic who uses it says to pull all 4 plugs and then fill each cylinder with the foam. He said let it stay in there for 24 hours......while turning the crank about 90 degrees every 6 hours. He did say nothing can replace walnut blasting, but he speaks very highly of this product.

 

My internal combustion BS detector is going off.

The issue is the backsides of the valves, not the cumbustion chamber.

The only way this could clean anything useful is if the intake valve was open at the time the foam was sprayed into the plug port. And considering a full cycle is 720 degrees, a 90 (crank) degree turn will still leave at least two valves closed on the engine (on random cylinders).

Not saying it's a bad product, but the method of delivery sounds flawed to me.

As noted the non S cars don't have the carbon issue...

 

didn't i just mention these N12 engines ARE NOT DIRECT INJECTION so do not suffer from the carbon buildup only the cooper S is direct injection is it any wonder so many crook companies and technicians are in business.......lol I too wasted a fortune in miracle in a bottle cures to no avail take my advice and save your $$$$$$$$ for the expensive repair that i think our engines are gonna need.........also like danjreed mentioned the only way to get anywhere near the carbon with bottle solvents is to remove the intakes and have access to all the valves, you'd be better doing the old mehanics trick of injecting WATER yes Water not fancy water jus plain tap water into the inlet manifold with the engine running the theory is that your using steam to clean the carbon,was used for generations by old skool mechanics and technicians ........the only way to remove carbon properly from MINI COOPER S MODELS is by the walnut blasting....imho Mini should be covering the cost due to a design flaw with these engines.....then when you put a peugeot engine into what otherwise is a small BMW what can we expect lol.....