my 140hp-5cylinder petrol has the following behaviour (only in cold) engine: with only medium load up to full gas it makes a loud noise, as if (in the front of the engine compartment) anything was leaking at the air eye or in the exhaust system (crackers?) and would be pressed in between. The engine now has 205tkm down and otherwise runs very well, jerk-free, jumps normally on etc. after 5 minutes drive the noise is gone. That means it gets less and less when the engine is completely warm, the noise is also gone at full load (full gas). Does anyone know that? What could it be?