just getting a idea here, has anyone had the S4 engine carbon cleaned. Is it recommended, did it work, were you happy and price ?
Talking to my dealer is like pulling teeth, you try and talk to them on the phone they just want to book it in to look at it.
I remember seeing something called terraclean on wheeler dealers, supposed to be good. Might be worth looking into
I have done a fair bit of research since starting this thread.
Spoke to engine builders and numerous engine cleaners, these are my findings.
As the product tester for the owners club, I'm always testing something. Some months it feels like I do as many miles on a Dyno as on the road.
There seems to be a few ways advertised of removing carbon.
Putting some gas or fluid through the intake.
This is the one I have questions with, they make some bold claims. Regain lost power, better fuel. So what better person to test. I offered a bore scope my car, Dyno run it have it cleaned and repeat the process. I have made this offer to countless operators with not one taking me up on my offer.
Being involved the motor trade all my live and my father before me. I have seen my fair share of carbon removals, I takes grinding or blasting. So while I have no doubt in the various blasting processes, I have serious doubts on the chemical process. Now the chemical process does more then likely remove some contaminants, can not see carbon being one.
Where you have people swearing they felt a diferance after, could be some gunk removed or the placebo effect.
Even someone like myself that tests all day everyday, have to check placebo effect. If you get told this will change abc on your car. You are now paying extra attention to abc. Abc will feel different, I get someone else to double check any findings I'm unsure of.
In summing up
Gasfluid clean .... may clean something but not carbon. Cleaners have said it's more ptoventitive then reactive, they also admit running premium feul will have the same effect.
Blasting with media ... proven results
DrEskimo, Thanks for your post, however the S5 in that example has the N/A V8 FSI which suffers really badly with carbon buildup, caused by the large valve overlap at lower speeds, so any sort of cleaning would help. See photos further up this thread.
You can see the before figures are poor.
The V6 3.0 TFSI Engine is supercharged and suffers much less (if at all).
Yes fair enough. £99 for 21bhp is very worthwhile and obviously some of the softer "sludge" must have been removed.Yea fair enough. Obviously any carbon clean process will just restore what's lost due to carbon build up.
My post was to just provide some objective evidence that carbon clean did have a measurable effect on restoring lost horses.