[MA70-3.0GT]

No I'm the one in the process (now completed, yay!!!) of swapping an old Mitsi Pajero for an "abandoned" MA70 which had already had a full rebuild, minus new turbo...

Anyhow, progress report-: Done a hot test which came out as all being 155-160psi & so in theory all good. Also given it a thourough bleed through with the front raised off the ground a good 15". The thing is though, there's still a constant stream of tiny bubbles coming through (creates a foam that looks like the inside of an Aero bar!) into the rad top.

I wasn't about to put sealer in willy-nilly, was just considering trying this if the compressions were showing a BHG simply to get some use out of the car to find any other faults before stripping the engine again, as the comps. seem fine I'm not going down this road.....yet...

Anyway, the compressions being good & no smell of exhaust in the bubbles (plus the discovery that the cooling system only really seems to gain pressure over & above water expansion when the turbo spools up) leads me to wonder if a worn turbo could potentially leak boost into the coolant, seeing as it's partly water cooled?
The turbo is pretty worn, with more play than I think there should be & some impact damage to the vanes. So could this be the case I wonder?

EDIT-: OK I just looked over a cutaway view of a 7M-GTE which showed a cutaway turbo & from that (not brilliant) view, it doesn't look like there's any possibility of boost being transferred from the compressor cartridge to the coolant. I could be wrong & hope I am because replacing an already worn turbo would be a lot less painful than doing the HG & then still having to find the cash for a new turbo anyway... So, anyone know definitively if a worn CT26 could leak boost to coolant?