Hello,

I have a 2.0D 140bhp engine on my superb from 2011. Lately I have noticed a bad noise, like a rattling in the engine compartment when the engine is cold. After a few minutes it goes away, when the engine heats up.

 

I though this would be from a bad motor oil(as I had seen such a situation in my previous Opel car) but I always use VW oil&filters and change the oil at 12kkm.  I also noticed in one morning that the engine could barely accelerate for the first 1-2 km and I would feel a kind of vibrations in the acceleration( the feeling was that one cylinder was not working) - this happened only once .

I have a VCDS and would like to check the injection conditions and the fuel pressure at cold but don't have a clue how. Maybe somebody here knows...

Also, any ideas on what else could cause the noise? Is this engine, CFFB, prone to internal failures( like the VW FSI 1.2 L)?

BTW the timing belt I replaced at 110kkm(4years ago) and now I have 187kkm

 

I have set an appointment to a repair shop but maybe I can figure out what wrong with it.

Dual Mass Flywheel?

 

Is yours manual or auto?

 

Edited 28 October, 20205 yr by bigjohn

it's manual but I imagine the sound would be permanent

 

DMF [edited] noises usually worse at tickover / low speed but can change with different circumstances (depending on which internal springs/cogs are failing).  Can also cause some vibrations.

 

As it is a manual - does the noise change with clutch in compared to clutch out. This can help to discount DPF issues.

 

 

Edited 31 October, 20205 yr by bigjohn

19 hours ago, bigjohn said:

 

DPF noises usually worse at tickover / low speed but can change with different circumstances (depending on which internal springs/cogs are failing).  Can also cause some vibrations.

 

As it is a manual - does the noise change with clutch in compared to clutch out. This can help to discount DPF issues.

 

 

 

Do you mean DMF? Dual Mass Flywheel? 

1 hour ago, drefaldwyn said:

 

Do you mean DMF? Dual Mass Flywheel? 

Oops - yes.

 

Dyslexia rules KO. Will edit.

 

Edited 31 October, 20205 yr by bigjohn

It goes away immediately after I accelerate it a little bit. I noticed that this behavior occurs when, with the engine cold, the idle RPM is at 700. Usually it stays at above 900rpm with the engine cold. Anyway lately I tries to test the injectors with the VCDS and I get for the Cyl 1: -1.2mg/stroke and cyl 3.: +1.2mg/stroke but I don't get the rattle anymore. Are these measured values ok?