Payen,stamped BK450, original standard composite reinforced gasket used on all large bore engines by Rover including Metro and MG Turbo and is an exceptionally good gasket.
Asbestos free with copper type sealing rings. Compressed volume is approx 3.3cc.
This original head gasket has now been superseded/replaced by the
GUG702560HG which has a different black rubber type O ring fitted on the rocker supply gallery. Many customers prefer this original TAM1521 Payen gasket without the rubber seal which has been proven over time to be superior in competition use, even though some people are still using our good copper gaskets, see
GEG300.
-Thoroughly clean both surfaces, check head and block is flat with straight edge and feeler gauges.
-install studs into block hand, tightened and oil the the threads
-install new gasket dry onto block over studs
-install head and rocker shaft, confirm it not fouling on anything.
-tighten head nuts in the correct sequence incrementallly 5foot pounds at a time, up to 45 foot pounds total and triple check all are at correct torque. Follow minispares product instructions for washers to be used on the front studs only.
-check valve clearances
-Start engine without coolant for 2-3 minutes
-leave to cool down for around 1 hour
-fill with coolant
-restart engine