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***HDi fun*** · 08-05-2008, 05:45 PM

This is a debate that will continue ad-infinitum. I'm guessing that if an engine is already extensively coked then the removal of all of it could lead to sealing problems.

However, if coking is controlled by virtue of good operating conditions (ie. quality fuels, good maintenance and not too much short distance driving) then it's best to keep things clean.

I've never yet heard anyone say that it's a good idea to skip a couple of services, use the wrong grade of oil, fill with poor fuel and drive stop start for five years in order to build up a healthy deposition of carbon and other associated by products of poor combustion.

08-05-2008, 05:45 PM	#13 (permalink)
*HDi fun* Moderator Torque King Car: E39 Join Date: Apr 2006 Location: Buckinghamshire UK Posts: 11,306	Re: Alcohol/water injection turbo diesels. This is a debate that will continue ad-infinitum. I'm guessing that if an engine is already extensively coked then the removal of all of it could lead to sealing problems. However, if coking is controlled by virtue of good operating conditions (ie. quality fuels, good maintenance and not too much short distance driving) then it's best to keep things clean. I've never yet heard anyone say that it's a good idea to skip a couple of services, use the wrong grade of oil, fill with poor fuel and drive stop start for five years in order to build up a healthy deposition of carbon and other associated by products of poor combustion.