If you want to do a proper "leak test" get yourself an OTC leak tester unit. It will cost $80 and you will need small compressor for the job. If you...
I would never ever put any cleaner into my coolant system. Some of those "cleaners" can be aggressive to aluminum and instead of getting some benefit...
With all do respect for Mr ASTRO and his knowledge but I will allow myself to disagree on idea that cleaned injector is as good as new. It is a wear...