Engine 'Carbon Clean'?

[SteveC]

anybody do this on their P car?

I don't see it in the service book, but when it was done along with a new fuel pump and regulator on a non P car the car runs like new - very little vibration, smooth, surreal almost.

I've never heard of it before

[911sies]

You mean this stuff?

I must admit, I thought it was snake oil, but I've heard good things about it. Here's a Pelican thread. 

Sea Foam

[Redracn]

I have had good experance with this Nulon stuff. Did a before and after borescope inspection and it did remove carbon in the cylinder. After a couple of cleans almost all head carbon was gone with very little left on the piston. 

 

[SteveC]

It was done at non P dealer and when the service advisor suggested a carbon clean i thought here we go again and asked him is this the fuel mixture you add to the tank as I don't need that as I run on BP Ultimate? he said no we dissemble the intake and throttle body and spray carbon cleaner to substantially reduce carbon build up. It was about $290 so decided to give the dealer the business. 

When I got the car back I was rather pleasantly surprised and unexpected - less car vibration, power seems effortless, revs smoother, throttle response was much better. picks up speed easier, car became overall more refined.

Got me wondering - should I do it to the other cars but I've never heard the P dealer mentioning something like this?

You mean this stuff?

I must admit, I thought it was snake oil, but I've heard good things about it. Here's a Pelican thread. 

Sea Foam

I have had good experance with this Nulon stuff. Did a before and after borescope inspection and it did remove carbon in the cylinder. After a couple of cleans almost all head carbon was gone with very little left on the piston. 

 

 

It was done at a car dealer so I don't know what they used, but I presume this is similar to what they used

[Tit]

Carbon build up is epidemic in modern DFI engines.

I'm thinking of installing meth injection in the mini to prevent this (plus the additional cooling & power)

Here's what my mini looked like before it's first de-carbon!

[Harvs11]

I lifted this from one of the many PP  threads on using Seafoam carbon cleaner.   Worth considering...

Seafoam does work however as fun as the "smoke shows" are, I recommend using it sparingly if at all. Where do you think all them dislodged bits of carbon are gonna go? Into the turbo hot side and/or the cylinder walls (think possible scoring, carbon is hard even on alusil). 

Don't get me wrong - its good stuff and it does work, but there may be unintended consequences. Probably best to do a little at a time (like, by putting it into the tank rather than the "fun" way) to minimize the likelihood of really big/damaging chunks getting busted up (better to have little ones over many engine cycles than a few large dramatic ones over a few).