Hi there,

Some radiators do not have drain plugs, to do a complete flush remove a heater hose, lower radiator hose at the radiator and the thermostat housing & thermostat, back flush the heater with low pressure water, then place water hose into heater hose that is connected to the block, flush here, also flush out radiator & flush with hose in thermostat housing, when water runs clean, you are done, replace thermostat and seal/ gasket with new, replace hoses and top up coolant, bleed air and run till normal temp is up, check heater is hot, check for any leaks.

mark (mhpautos)

Answered by mhpautos (expert)
27,074 answers provided