Is this any good or just a gimmick? Putting hydrogen gas through the engine intake to blast out carbon deposits to return your engine to tip top condition.....?

 

I don't have any experience of it but I think it's just a gimmick load of nonsense tbh

 

Sounds like a gimmick to me.... My mates talking about getting his audi done.....

 

Get it done properly with blasting.

 

Surely getting rid of all the carbon build up in an engine would help.

 

The hydrogen sounds like bollocks.

blasting the inlets on direct injection petrol engines with walnut shells is proven to work though, as James rightly says.




De-coking the inlet tract of engines is worthwhile, diesels get very coked up with the egr’s still connected.

another way to de-coke is to run a meth setup 🤣 someone was showing me their home made set up on some old dervs and the inlets where spotless 🤣

 

The B7 RS4 and the V10 engine in the S6 and S8 of same vintage was notorious for loosing vast amounts of horsepower to coking issues.

 

I think they must do something, but how good im not sure. Doing it on a DI engine it would only really clean the exhaust valves and ports. For the full effect youd need to go to someone that used the one where it feeds into the intake and for that you can buy stuff your self and give it a bash. Go look up Project Farm on Youtube as he does a test to an old ford pick up im sure and the difference is mega! Think it was all seafoam products.

Id honestly give water meth a go as well if its not to late.
When i mapped my 335d, I didnt delete the EGR to being with but ran a WMI set up. I owned the car from 40k -115k and then i did the swirl flaps at 112k the intakes were spotless! Honestly put that down to running the meth set up. How long it takes to work im not sure, but if i had direct injection engine that was notorious for carbon build up id get it done.

 

I know on VAG tfsi engines these carbon clean gimmicks knacker the injector baskets.

As above (Burnzy) a proper decoke with walnut shells is the way forward.

 

I googled walnut shell decoke.... That sounded more of a scam than hydrogen....

 

How does media blasting sound like more of a con than just pumping gas into the engine you narna?

I’m guessing you now know they use walnut as it’s hard enough to remove the carbon but soft enough to not damage anything else

it’s properly effective too, unlike pumping some kind of magic fart mix into the inlet tract hoping it’ll clear all the stubborn dried on carbon/oil sludge

 

ive heard of bead blasting and such like ….not heard anything about walnuts before....

 

Well I'd not have any of this crap put in my cars that's for sure

 

what even the walnut blasting? I’m guessing the GTR’s are direct injection? If so do they not suffering with coke issues?

edit: your rs6 would suffer too surely? But not as bad as the N/A cars iirc.

 

I might eat some walnuts but I don't want them in my engines pal 😂🤣 lol

 

🤣🤣 It sounds odd I agree, my mate uses the walnut method when doing carbon cleans and he knows what he’s doing around cars, has his own mechanic business and specialises with performance Audis, built his own 820bhp C6 RS6 for starters, although MRC mapped it as the injectors he’s used aren’t very well known for calibration files or something, and they are the only guys that have them, plus their mapping skills are very good as I’m sure your aware.

i wanted to see if MRC used walnut blasting but it seems they do it old school and by hand, or at least used to anyway.

but I came across this thread regarding the hydrogen, and it’s a crock of crap as we assumed 🤣🤣

https://forum.rs246.com/viewtopic.php?f=35&t=117463

 

GTR's are not DI....the RS6 probably is.

And there's a huge difference with the walnut blasting which blasts AND removes the deposits and done against closed valves.

A lot of those other bullshit claims may well dislodge some crud....and send it where ? through the engine, into the CAT, DPF ? both cheap items of course.

 

We do lots of Carbon Cleaning, the walnut system we have is really good at cleaning inlet ports on Direct injection cars, where there is no fuel washing over the inlet to keep it clean, most DI engines suffer from carbon build up.
Our tooling fits over the inlet port, fires walnut shell into the port and then sucks it back out. You need to turn the engine over and ensure the valves are shut on the cylinder you are cleaning.
The idea of walnut shell is that if small pieces were to enter the engine it won't score the bore etc and will burn, you certainly wouldn't want to fire sand or glass beads into the inlet port with the engine in the car.

HHO we also do, we do see some MPG gains from it, but don't sell it as a carbon build up fix, as it only works for inner cylinder, more as a service to do every 10k miles to help prevent inner cylinder carbon build up. it won't cure carbon deposit issues once its built up.

Wet carbon cleans like terra clean I avoid at all costs, as I've had a few in for repair that have been done, and lumps of carbon have broken free and stuck behind valves, preventing the valve closing correctly causing piston to valve contact.

Water Meth is a great addition to DI petrol and diesel engines to keep carbon build up to a minimum, I run a kit on my 123D and see 25BHP gain from some meth.

 

Coming back to this as I mentioned blasting above (thinking about walnut)

I saw a diagnose Dan vid the other day where he blasted with a media that’s dissolvable. Obviously works same way as walnut blasting but if there’s any media left the vacuum won’t suck you can just squirt this apart in and it dissolves any media. Blasting is pretty cool idea to be honest and sounds worrying but you’ve got the valves closed and a vacuum cleaner sucking as you blast.

I think if I had a DI I’d have intake manifold off and clean out properly then get the valves blasted, run a separate oil breather or just add a separator and ditch egr.


But the main reason I mention it was he blasted one set of valves so they were mint then left the other 3 intake ports untouched, put the inlet back on and done one of these intake cleaner spray things he’d got that claimed to be great. Total crap and all it did was drag loads more crap that was in the intake manifold into the intake ports and his newly cleaned valves looked like crap after too.

We had a rep from one of the engine cleaner companies come in the garage where I work the other day, F me the bloke was there for about 2 hours like a bloody double glazing salesman! Didn’t wanna take no for an answer and was a right menace.

 

Was it soda blasting? As bicarbonated soda crystals are dissolvable with just water, not sure why it’s not used over walnuts though.