Eating Coolant After Maintenance? Please help troubleshoot

This is why I love my vacuum filler system. Gets all of the air out the first time, every time, AND verifies no leaks. It's worth it's weight in gold I tell ya! Saves me a ton of labor time at the shop.

 

Some vehicles will pass a pressure check, but can still have a minor seepage during operation, where pressures fluctuate constantly.

 

Link to one?

 

This is the system that I have. It's more commercial, but there are others.



https://gmspecialservicetools.spx.com/ToolDetails.aspx?id=309

The one I have is not cheap, but as I mentioned, there are several different versions available.

 

Yep. Mine held pressure but had real minor seepage. Dye test would probably more accurate.