Blown head gasket l322 v8

My L322 V8 has suffered cooling problems for 4 of its 5 years , bought new. After 4 Radiators via 3 main dealers, it now apperears to have blown the head gaskets. Being good on the spanner, I thought let me have a go at the heads and possible piston liners. Should it be engine out or in situ. Is their a good worshop manual or some who has done this from the real world.
BUSTED L322 OWNER

:welcome: try postin ya question in the range rover section .. you will probably get a quicker reply

Typical RR owner guess the satnav doesn't work either then?