Hi, yesterday when I was changing tyres at the Opel Corsa D, I found out that the coolant tank was almost empty. After more detailed inspection of the engine compartment, I noticed that the coolant hose was bitten by a marten. As a result, the whole coolant ran out. A day later, I got the cooler hose as a spare part from an Opel dealer and replaced it for the defective hose (the defective hose with the marten bite marks I have on Since this “only” cost 27 euros and I could install it myself, we did not want to make an insurance case out of it because of the hose. After successfully changing the hose I filled the coolant again up to the max. limit and let the engine warm up. When giving gas in idle I noticed then that white smoke comes out of the exhaust and loud “glucky noises” were audible. The engine temperature rose partly to up to 112 degrees. Furthermore, I noticed that the the fan was not activated by the engine even at high temperatures (on the engine of the fan there are spots of dripped cooling center visible, probably this led to a defect of the fan motor). After a conversation with a friendly mechanic we now suspect that the cylinder head could be broken, since the car was moved without sufficient coolant. The car should now be brought to a workshop for inspection. Unfortunately we have the marten The car does not have a sensor that warns you about it. This would be a consequential damage after Marderbiss, which is also covered by our insurance rate up to 5,000 euros. We would like to report the damage now to the insurance company. But how do we proceed here? – When do I have to report the damage to the insurance company? – Could there be problems with the insurance because I changed the coolant hose myself? – Could there be problems with the insurance because we drove unknowingly with an empty coolant container? (We only noticed when the tyre was changed, that the container was empty and then discovered the marten damage there) – What else is there in this case? a case to consider? Thank you for your answers!