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TSI AV · 11-24-2006, 11:42 AM

Hi,

I've got no wish to argue.

Sorry for "AMBIENT"... English is not my mother tongue.
Will learn it ... Thank You.

Regarding diesels...

Of course, every experience is appreciated.

But,
Statement, that "carbon builds up in inlet manifold due to low load" is very strange and unexplainable. And confusing for others as well.

Mostly carbon build up in air receiver occurs due to:

1. Oil leakages in turbo / mechanical blowers (if any).
2. Valve guides / valves are worn down.
3. Worn down liners.
4. Compression / oil scraping rings are worn down.
5. Exhaust passage is not clean / straight.
6. Valves are not tight enough.

Regarding "cleaning" of engine by running it 110 %:
1. Yes, I agree, that exhaust temperatures will be lower after that. Carbon will burn away. I also had to do this in some emergency cases.
But, if it has to be done from time to time, then the reason is not a low load (if running on MDO/MGO).
Normally the reason is a "not complete burning process".
This can be caused by many factors...
Injection, dirty air cooler, dirty turbo (nozzle ring, blades),
Intake air temperature, engine construction, etc...
2. This is a dangerous action. I have seen connecting rods coming out of crankcase...

Kindest regards,

Your dear Estonian friend

P.S. Peace ?...

11-24-2006, 11:42 AM	#31
TSI AV Senior Member Join Date: Mar 2006 Location: Malta Posts: 103	Hi, I've got no wish to argue. Sorry for "AMBIENT"... English is not my mother tongue. Will learn it ... Thank You. Regarding diesels... Of course, every experience is appreciated. But, Statement, that "carbon builds up in inlet manifold due to low load" is very strange and unexplainable. And confusing for others as well. Mostly carbon build up in air receiver occurs due to: 1. Oil leakages in turbo / mechanical blowers (if any). 2. Valve guides / valves are worn down. 3. Worn down liners. 4. Compression / oil scraping rings are worn down. 5. Exhaust passage is not clean / straight. 6. Valves are not tight enough. Regarding "cleaning" of engine by running it 110 %: 1. Yes, I agree, that exhaust temperatures will be lower after that. Carbon will burn away. I also had to do this in some emergency cases. But, if it has to be done from time to time, then the reason is not a low load (if running on MDO/MGO). Normally the reason is a "not complete burning process". This can be caused by many factors... Injection, dirty air cooler, dirty turbo (nozzle ring, blades), Intake air temperature, engine construction, etc... 2. This is a dangerous action. I have seen connecting rods coming out of crankcase... Kindest regards, Your dear Estonian friend P.S. Peace ?...