Originally Posted by Dune
Model 20MDL4B, vintage 1993. Do you pump old coolant out with self priming electric pump via tube on the pump placed in the top of the radiator ....or..?
If pump, any suggestions for a pump I might find locally ?
There's usually a drain plug on the engine block, it can be opened normally with out un bolting any thing, if you cant find this on the block consider removal of the lowest coolant hose to drain,
Running an engine flush through the system is a good idea if the coolant has not been changed for a few years (over) , a lot of people dont realize that old coolant actually turns acidic at some point and starts to eat internal Aluminium parts