I have been out of the loop for awhile , and as I rebuild my 4.0 motor from my Discovery 2, I would like to know if there have been any upgrades on aftermarket parts. Like for example has the water and oil pumps been improved upon?? Radiators constructed more solidly?? Fans and clutches ?? Anything that I missed??

 

Recent upgrade to the PCV mod - run the search.

 

Luckily, touch wood, I haven't replaced anything internally on my V8 but externally...
- added the @Best4x4 PCV mod
- replaced the 190 degree thermostat for a TD5 180 degree thermostat
- installed Hayden 2781 fan clutch
- installed Dorman 620-112 radiator fan
- use an Ultraguage Blue OBDII dongle and app to monitor engine temps and engine information on my smartphone & tablet

Next up I'll replace the radiator with a Nissens brand radiator.

 

Juke, what is so special about the fan?? extra blade?? different pitch?? And what is so special about a nissens radiator?? Is water pump design improved upon, too?

 

I don't think there is anything really special with the brands I mentioned.
I bought and installed those specific parts since other forum members state they fit perfect rather than buying overpriced LR parts.

 

Coil pack relocation
Abran's aluminum coolant Tee and reservoir

 

if high coolant temps were a problem during low-RPM trail use,i think a Davies Craig EWP inline electric water pump could be installed to boost coolant flow at idle and just above idle conditions-stock water pump is very small for a 4.6L engine.Davies Craig electric water pumps and fans are made in Australia