aquafresshness
Seaman
- Joined
- Feb 28, 2009
- Messages
- 60
I have a water leak somewhere in the lower area of my serpentine belt (I can tell by the way it flings water off the belt in that area) and I was suspicious that it was my raw water pump, but now I'm not so sure.
I took it off and tried to build a tester for it. I basically plugged the outlet with clear tubing with a PVC plug in the end, then clamped the hose into the inlet with another piece of clear tubing and turned the water on to see if there were any leaks.
I first did it without the impeller in there and couldn't find any leaks, even when I spun the pulley. Then I put the impeller back in, cranked the water pressure on again and still couldn't find any leaks, even while I was turning the pulley. I might get the drill out and a fan belt so that I can spin the pulley faster later, but for now I was satisfied that it might be something else leaking in there.
So do you pros think that the 40psi coming out of the garden hose is sufficient pressure to replicate the conditions it would normally operate at? I figured it would exceed the normal operating pressure this thing pushes out normally, but what do I know.
I know my system's not fool proof, but I figured I'd ask for anybody else's advice on what else I can do to check the pump. I figured the pressure test would be pretty reliable. Purchasing a new one is almost $400. That's an expensive guess.





I took it off and tried to build a tester for it. I basically plugged the outlet with clear tubing with a PVC plug in the end, then clamped the hose into the inlet with another piece of clear tubing and turned the water on to see if there were any leaks.
I first did it without the impeller in there and couldn't find any leaks, even when I spun the pulley. Then I put the impeller back in, cranked the water pressure on again and still couldn't find any leaks, even while I was turning the pulley. I might get the drill out and a fan belt so that I can spin the pulley faster later, but for now I was satisfied that it might be something else leaking in there.
So do you pros think that the 40psi coming out of the garden hose is sufficient pressure to replicate the conditions it would normally operate at? I figured it would exceed the normal operating pressure this thing pushes out normally, but what do I know.
I know my system's not fool proof, but I figured I'd ask for anybody else's advice on what else I can do to check the pump. I figured the pressure test would be pretty reliable. Purchasing a new one is almost $400. That's an expensive guess.




