Rodeo - TF - 2.8L Diesel - Compression Leak, Compression Leak & Over Heating

I have a 1999 TF Holden Rodeo Crew Cab, 2.8L Turbo Diesel Engine, 5 Speed Manual Transmission in it and several weeks ago it started to blow water out of the radiator.

As time went by, it got worse and I had it checked by my mechanic and both him and myself diagnosed a Blown Head Gasket.

As a result of this, he removed the Head and could not really see where the problem may have been, so he sent it away and had it Crack & Pressure Tested, Faced and they also could not really see where it was blown.

At the same time the Radiator was sent to a specialist and Cleaned.

When it was re-assembled, the Block had been Flushed, Head replaced with New Head Bolts and new VRS Gasket set, a new Water Pump & Thermostat, new Radiator Hoses and the Cooling System Sealed.

When it was started, SAME THING - Bubbles coming up and blowing the water out of the Radiator, which to us indicates that there may be a Compression Leak somewhere.

I have got it booked in to have a Compression test done shortly.

Has anyone else had the same or a similar experience and/or does anyone have any ideas as to what may be the problem and how to fix it?

Regards,

amen_amen_amen