ZR-1 Net Registry Forums - View Single Post - Need help troubleshooting Cooling problem

mike100 · 01-22-2017

I had trouble the first time I refilled water after a radiator job/ injector pull- I don't recall what the repair was, but i do remember worrying that I could not bleed the air bubble out of the top of the engine to restore flow.

A quick way to know if the water pump has a head of water coming through it is to remove the expansion tank cap to see if the rubber vent line near the cap has a stream of water pissing back into the tank. If not, then jack up the passenger side of the car as high as your highest jack will take it. Start the car and top up the system. This has purged the air pocket every time for me.

01-22-2017	#13
mike100 Join Date: Feb 2011 Location: San Marcos CA Posts: 1,786	Re: Need help troubleshooting Cooling problem I had trouble the first time I refilled water after a radiator job/ injector pull- I don't recall what the repair was, but i do remember worrying that I could not bleed the air bubble out of the top of the engine to restore flow. A quick way to know if the water pump has a head of water coming through it is to remove the expansion tank cap to see if the rubber vent line near the cap has a stream of water pissing back into the tank. If not, then jack up the passenger side of the car as high as your highest jack will take it. Start the car and top up the system. This has purged the air pocket every time for me.