Couple of issues after deep water

Hi

I've got a couple of issues after a deep ford just under 4 foot I've got a snorkel and axle breathers but since I've bin through temperature gauge kept going up and down but I don't think it was over heating, and glow plug light was on but soaked relay in we'd and sorted that,


Has any one had over heating problems after deep ford because it could be over heating and I don't know about it if you know what I mean?


Thanks

Pat

Muck in rad?

Faulty temp gauge/sender??

Btw it's a 300tdi. Discovery

And will check rad now

If your gauge is moving up and down faster than you think its posible for your engine to change temperature its a sender or elec fault