Originally Posted By: badtlc
Originally Posted By: Trav
Originally Posted By: badtlc
Those that get the deposits can easily burn them off if they choose to.
Not true in all cases. Way too broad a brush with that statement IMO.
Look at this then tell me how running the engine at 3K for 20 min is going to clean this mess up.
If that had even the most remote chance of working i think VW/Audi and others would be recommending it as preventive maintenance.
http://www.audizine.com/forum/showthread.php/336352-Audi-FSI-Engine-Carbon-Build-up-Megathread
http://www.thetruthaboutcars.com/2012/05/ask-an-engineer-gdi-problems-in-a-nutshell
http://www.dailytech.com/Direct+Injected...rticle21962.htm
http://www.munichmotorsport.com/wordpress/?page_id=601
I have a few Di injectors from hi revving marine engines that are damaged beyond repair and they see 5,000 RPM for extended period.
Because your car isn't having the issue yet you cant claim anything will work on all engines.
3k doesn't cut. VW specifically stated 4,500+ RPMs. And yes, it does work, has been documented with photos to work.
Why are they still cleaning with walnut shells then?
Why are the cars that see these RPM's for longer than 20 minutes on a regular basis still having problems?
Is there a TSB that says no blasting needed just take it out and drive it at this RPM for this many minutes?
How do you bring the rear of a sodium filled valve up to those kind of temperatures when it is designed to dissipate heat?
If you need to do this sort of nonsense to any any engine to keep it running properly its poor design.
As i said before you cannot claim this will work with all engines. If that were really the case this would not be as big an issue for the manufacturers as it is.
Can you post some VW/Audi documentation to substantiate your claim.
Another point is its just not the rear of the valve that accumulates deposits its the area in the intake channel around the valve. You cannot get the head up the sort of temp you would need to burn it off, its liquid cooled.
Even in Germany where 4500+ RPM for 20 min and much longer is done on a daily basis in many cases they are still having problems.
Threads like this one are common.
http://www.1erforum.de/bmw-135i/reinigun...ung-113320.html
Sorry badtlc your casual easy approach to this issue is not realistic.
Originally Posted By: badtlc
Those that get the deposits can easily burn them off if they choose to.