Hi guy just wandering if any of u had water pump not working just few drops coming through it a escort rst and are they a common fault?ive put coolant tester on and no blockages or leaks and water goes out ok with pressure tester but not with water pump it self.it build up air pressure making it over heat my headgasket it ok also got headgasket tester with dye passed ok.anybody had same symptom?Also thermostat removed 4 testing.Gav