paddyg 0 Posted January 30, 2007 Having just fitted a new heater matrix in my corrado the next job is to replace the coolant. I still have the new matrix disconnected from the engine block as there should be no need to flush the new matrix right?, so I want to flush the rest of the cooling system (the block, radiator, expansion tank, ???) If I disconnect the bottom rad hose and open the expansion tank cap and continually fill the expansion tank with tap water while the car is running will this flush out all the parts? (minus the matrix of course as it will be disconnected). Or do I have to let the car run for 10 mins or so, so the engine heats up and opens a thermo switch(?) which will allow the block to be flushed? Or is this switch just used to turn on the fan? Or does it do both (fan on and valve to block opening)? cheers paddy Quote Share this post Link to post Share on other sites
Son of a Beesting 0 Posted January 30, 2007 thermoswitch turns the fan on. If you dont have a drain plug jsut pull the bottom hose of and run a water through a hose through it. Quote Share this post Link to post Share on other sites
paddyg 0 Posted January 30, 2007 will this flush all the parts of the cooling system even if the engine is not up to average temp? Quote Share this post Link to post Share on other sites
