Hello,

since a few months the engine(CFFB) started to have a bad noise like a rattling, it happens only for the first 5min when the engine is cold. I will make a recording of the sound .

I did not see any decrease of power or increased fuel consumption. I checked the injectors and I get -1.0mg/stroke, 0.2mg/stroke, +1.0mg/stroke and 0.2mg/stroke - are these values normal? I see a 2 mg difference between the cyl. no1 and 3.

I  have now 187kkm and the distribution belt and water pump was replaced at 115kkm - could this be the issue?

I plan to replace the motor oil even though I have only 8kkm with it and I use only OEM oil

 

Any other ideas on what could cause this noise?

could be the alternator starting to go? when was the auxillary belt (alternator etc) and tensioner done?