| This time I put a piece of tape over the petcock opening instead of using the screw on block off plate I had made to use on the first steps. |
|
| They were fitted with a dial gauge, a vent port in the form of a petcock or counterweight, and a safety fuse. |
|
| Steam for ten minutes, then shut off the steam by either closing the petcock or dropping the weight gauge into place. |
|
| Flush the radiator until the water coming out of the drain hole, petcock or lower radiator hose opening is clear. |
|
| If your radiator does not have a drain plug or petcock, disconnect the lower radiator hose and allow the coolant to drain. |
|
| Stop the engine, open the drain plug or petcock, catch the fluid in a large container and dispose of it properly. |
|
| Loosen the drain plug or petcock at the bottom of the radiator and allow the coolant to completely drain out. |
|
