Does anyone have instructions on how to fix the anti drain back valve? Truck is a 95 w 225k and if it sits for more than 24 hrs its a beeeech to get started cause the hpop is empty. So I need to know if I can fix the check valve or do I have to get a 17* and swap the guts to fix it. I plan on doing the latter eventually but don't have the $ right now.