Your advice please gents, could hydraulic followers "pump up" if too heavy a grade of oil was used?
I have had difficulty starting when hot on my 3.9 Disco, ( symptoms appear to be low compression and flooding) , testbook reveals no problems with the fuel system, ignition has good spark when the fault occurs, only way to start engine is to pull the fuel pump fuse, crank as per flooded engine on full throttle, and then bung the fuse back in when it catches.
Trouble is, it won't always repeat the fault, but GF noticed last time it happened, engine seemed to be turning over as if plugs were removed.
Its only happened since the last service, (and the hotter weather) and I believe 20w50 was put in.
Your collective advice keenly sought.
Lofty