I have had a p38 diesel (tuned,Td5 disco tuned ,just sold it .i prefer my Rangy 4.6 ,would not go back to a diesel ! It does around 13mpg taking it steady around town, and 22 ish on a run.
Bit of a pain to fit headlights alot of cutting,wiring easy,had to cut the grill down and shorten it as it was to wide,bought headlights off flebay for less than £200 and £100 for the grill.....
Could be a becm problem,i have had this happen before and i fitted good secondhand unit and it cured it.Email me at [email protected] if you decide to go this route my be able to help you................
i looked at a 4.6 for a friend he did same as you and put engine sealer in it still did it.Check you are getting a return to the header tank through the thin pipe,his was blocked,i changed radiator and it fixed the problem.
I took the top off his old radiator and it was full of the sealer he...
Have a look here it might give you some idea what can be done with the p38.
Range Rover Body Kits and Upgrade Kit, Wheel, Modifications, Accessories etc
If you update your profile mate,people will know where you are and might be able to help you.I have very first rovacom unit & faultmate msv-2 and its best money i spent,i have a Range Rover 4.6 and Discovery Td5 ....Cheers