Potential Fiat Ducato Injector Rust Problems 

It’s worth checking the seal against the windscreen and the water drain tubes to make sure water isn’t leaking into the engine bay. There is a black plastic cover to protect the top of the engine where the injectors are but beware as water could get in there and if left unchecked could potentially rust your injectors making them vey difficult to remove should they need replacing. This is particularly important with Motorhomes and camper vans that are often parked up for long periods of time.