I learned some bad news yesterday... took my dommie for a service and the mechanic had a look at the engine.... the valve lifters are completely ko'd!!
This happened because the engine was starved of oil and so the cam lobes/lifters wear out quite quickly. IT was making a slight clicking noise at idle, which i thought was worth investigating.
I'm now in search of a new head for this motor, need it back on the road asap!