NB. If you are introducing Steel Seal via an surge / expansion tank please make sure that there is sufficient room for Steel Seal to go directly into the cooling system and that it does not just sit in surge / expansion tank reservoir.
For best results:
If you have tried inferior products flush your cooling system with clean water after disconnecting bottom radiator hose. Do not use a flushing agent.
If you have flushed system reconnect bottom radiator hose.
ADDITIONAL DIRECTIONS FOR BACKPRESSURE:
These directions are for people that have a lot of back pressure building up in the cooling system, usually shown as bubbling in the header tank or air forcing past the coolant cap.
Locate the cylinder causing the bubbling in the overflow tank or backpressure. (Remove plugs one at a time till bubbling stops)
Before starting the engine, remove the spark plug or injector from the cylinder that was causing the bubbling in the overflow tank or back pressure. If accessible, remove injector wire from that cylinder. This will limit the amount of unburned fuel going into the combustion chamber.
If you cannot find the spark plug/cylinder that is causing the back pressure, run the engine with the coolant level down to the top of the radiator core and with the radiator cap off or leave the expansion cap off the expansion bottle with water only just visible.
Make sure to run the engine up to temperature with the spark plug/Injector out and for the one final time with the spark plug/injector back in place.