They don't work very well on the TD5, I tried my one off the Explorer I had, it worked well on the Explorer, the reason it doesn't work on the TD5 is mainly because of the way the cooling system works, it won't keep the water hot long enough for a shower (now I'm talking TD5 Disco) I don't know if the Defender would be different or not, the Disco has climate control, all of the new diesels have the same problem, the flow rate is different in newer diesels.
 
I can tell you that the best place to mount it is the metal pipe that joins the heater hose to the top radiator hose along the passenger side of the engine.
 
It's a bugger because they are great devices.
 
Baz.
				
			 
			
		 
			
				
			
			
				Cheers Baz.
2011 Discovery 4 SE 2.7L
1990 Perentie FFR EX Aust Army
1967 Series IIa 109 (Farm Truck)
2007 BMW R1200GS
1979 BMW R80/7
1983 BMW R100TIC Ex ACT Police
 1994 Yamaha XT225 Serow
			
			
		 
	
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