[discovery steve]

Dear LR rovers, I've replaced two water pumps in the past month. The first one started weeps after a week and the second just stated weeping today (at about a week too) just a few drops. Could a faulty expansion cap cause this or am I just unlucky? Thank you all in advance.

 

[mbruneaux]

Dear LR rovers, I've replaced two water pumps in the past month. The first one started weeps after a week and the second just stated weeping today (at about a week too) just a few drops. Could a faulty expansion cap cause this or am I just unlucky? Thank you all in advance.

Quality parts matter, put a pressure system tester on it to check the pressure. Expansion caps are cheap enough.

 

[discovery steve]

Thanks for the speedy reply. Just got another put in by my Indy. This is my third one in a month.He said if this fails then I am on my own. Is there any other reason that would cause a water pump to weep other then the pump itself?
Thanks in advance again!!!

 

[gurunutkins]

do you know where it is weeping from?
weeping around the gasket has different causes that weeping around the nose. could be a slightly warped or damaged timing cover if from the gasket or if from the nose something as simple as a bad belt tensioner putting too much strain on components, the water pump has the shortest supported shaft of all the mounted components and will always show strain first.
more info would be good
cheers
Barri

 

[discovery steve]

It was weeping from the weep hole. Took an infrared thermometer to the top hose and the bottom hose from the radiator to the thermostat. Top one read around 187 and the bottom registered at 150. Does that sound right? What should the bottom hose read if the thermostat is stuck open?
Thanks again. Everything else is ok. Head gasket ok, expansion cap ok. Radiator is new. Wouk anything else other than the pump itself cause it to weep coolant from the weep hole?

 

[gurunutkins]

that sounds about right
the water comes out of the engine in the top hose and leaves the radiator cooled from the bottom hose (straight physics -cool water drops).
if you have gone through 3 pumps either the quality is very suspect or something else is wrong.
for water to come out of the weep hole the seals on the bearing race have to be failing. I would start to look at something in the serpentine belt system putting strain on the pump, generally something making the belt tighten then loosen repeatably
cheers
Barri