Right quick update...
Head came off on tuesday and Matt gave me a call on wendnesday - repeat head lift but this time coolant at 1 & 4 went. around the fasteners for the ARP studs it has stayed nice and tight but lifted in the middle 
not really sure where that leaves us, as it is looking like it is a design issue rather than soemthing we can fix....
but am still hoping some analysis of the exhaust manifold pressure gives us a final avenue to look into... but might just have to tone it down *sniff*
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Mods Fitted
Pipercross Filter; Full 2.5" 'Wingy' exhaust; Donny Custom Turbo outlet pipe; Custom injectors;
Uprated gearbox bearings; Helix Clutch; Quaife ATB; Upgraded clutch Hydraulics; FMIC; Ported Head; ARP headstuds; Leda coilovers; 'Brembodge' 326mm disks/DS2500 pads
Dieselpowered
Fitting Custom Hybrid Turbo (1856GTBv) & controller; Remap, swirlpot, lift pump
AMW Motorsports
Custom exhaust manifold & downpipe
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