Keep seeing companies offering to clean engine intervals with some machine. Apparently it uses hydrogen to clean carbon build ups but I can't really understand how that would work. Anyone tried this or worked out how pumping hydrogen through an engine is a good thing ?

 

Only see Ed China use one on wheeler dealer series. I think it was a Jaguar. The emissions plummeted after the clean. So it is doing something right. How long and thorough the treatment is, only time will tell.

 

http://www.klearkarbon.com/how-it-works

 

Interested to know if this could cause damage to the Impreza engine?
Never heard of this process before,results do look good tho.
Any idea on the price too? Edit: mobile service available for £99 sounds good,suppose you have to choose a company that know what they're doing(goes without saying I suppose)
Be interesting to see if anyone's had this done.

Subscribed.

 

Seen one website where it claims tap water is used, makes it sound like they fire water in through your air intake........

 

Seen a few terraclean vans around my area,
https://www.terraclean.co.uk/how-terraclean-works

 

Lots of snake oil products and services in this sector ranging from water to walnut shells (the latter probably does work, but only because it requires a partial top end strip down which is what you'd have to do with manual cleaning anyway).

Buyer beware.

With direct injected petrol engines (which is becoming a major problem now; worse than diesels), very little does anything to clear the inlet tract and ports other than physical removal and cleaning (can vouch for foam oven cleaner on plastic intake manifolds...no good on aluminum intakes though as its too corrosive).

 

There is a tread on rs246 about this. Some guy with a b7 did before and after rolling road dynos and the results are pretty non existent from memory. Like the post above, carbon build up seems to be a growing issue on fsi engines as nothing cleans the intakes or valves and the engine is effectively choking itself to death by throwing all the crud back in. Fix for the rs4 is to disconnect something which sits just down wind of the air filter. Sorry I can't remember the name, egr valve?

 

I helped clean the egr on one of my mates old seat Leon fr. The car had covered 60k and the state of the intake track was unbelievable.

With the combination of the crankcase breather putting in oil vapour and the egr adding hot exhaust gasses the carbon build up was extreme!

The pipe after the egr that went to the inlet manafold was so full of carbon deposits you could hardly get your finger down it!!

We had to remove it from the car and use a long screw driver to dig it all out! The inlet manafold also looked the same.

 

Wow. I think the thing for people to consider is if any cleaning is done in situ, then all that rubbish has to go through a running engine. Isn't the hydrogen clean done at high revs? Think I'd give it a miss.