Its a 2007 model volvo L120d and its been heating up but damn it hot here in Virginia ..The loader has 24,000 hours on it ..New Water pump new aux water pump and no thermostat in it now ..No water in oil ,no oil in water and No steam out exhaust ...Can it still be blown Head gasket ...
I know on the L70's & L90's there was a small hose running from top of head to top of plastic purge tank. If that hose would get plugged they would heat up. Never worked on a 120, but maybe same set up.