Head gasket on 1997 Chrysler LHS

My car was overheating.Replaced thermostat,housing,sending unit,vacumn.fan relay and bleed it.Still overheats.How do I know if its the head gasket(Has an automatic shut down when hot)

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1 answer
need ot remove plugs and put shop air into cylinder with piston at bottom dead center to see if coolant comes out the radiator.

Roy