it sure makes sense, its simple phisics. most people dont agree with my interpretation though.

One of my mates has had 2 cambelts snapped due to "forgetting" to fit the wading plugs.
the inside of the timing case looked, both times, like Salisbury plain in there.

The reason why I have 2... well, I had one fitted to the wadding plug, and the breather for the inspection plate cover was only £12... so I bought that too

Land Rover Discovery 300 200 tdi timing wading kit WK1 | eBay