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Water Pump?

2K views 20 replies 10 participants last post by  Jerry Bransford 
#1 ·
M almost positive my water pump is toast. Replaced it around 70k miles and now I'm running near 140k; so it's about time regardless. I can't remember where the dang weep hole was located? The coolant is pooling on top of the pump itself and I though the hole was on the bottom, also I replaced the thermostat and thermostat gasket pretty recently so I doubt it's that
 
#6 ·
Awesome thanks for the info, I retorqued the housing down for good measure; it also seems as though I was pretty loose on the bolts when I installed the themostat. It took a couple cranks to get to 20 foot lbs.

I'll monitor it and see how it is over the next few days.
 
#7 ·
Housing was good, thermostat still good; just needed a new gasket and I added a thin layer of RTV(normally try to do without it whenever possible) for good measure.

I think the thermostat wasn't seated properly and must have feel back during the original installation
 
#10 ·
Didn't know that:

INSTALLATION
(1) Clean all gasket sealing surfaces.
(2) Place a new gasket (dipped in clean water) on the coolant outlet connector surface. Position thermo- stat with air bleed at 12 o’clock position in thermo- stat housing (Fig. 12).​
 
#9 ·
So still barely leaking under the housing. I'm pretty sure the housing has no cracks but I'm going to order a new one; anyone have any luck with any other brands than the mopar part?

Also any chance it's leaking through the top of the water pump seal? It only pools up at cool down after the vehicle has reached temp and isn't running; I'm assuming after the thermostat)
 
#13 ·
Just tossing this out there because this happened to me. Have you been running AC by any chance up there on Seattle? During the later part of the summer here in Texas I was having a very similar issue after I had replaced a whole slew of items that had to do with cooling. Would keep finding a bit of water in that same spot after a drive from home.

Finally found it was the condensation dripping from the AC tubes directly above during the humid days. Days when I didn't run AC it was always dry. That was a fun one to figure out. Thought I was losing my mind thinking I had a coolant leak after all that work I had done.

Just a thought. I would imagine it's nice and humid where you are. Just not sure if it's AC weather still.
 
#14 ·
Just tossing this out there because this happened to me. Have you been running AC by any chance up there on Seattle? During the later part of the summer here in Texas I was having a very similar issue after I had replaced a whole slew of items that had to do with cooling. Would keep finding a bit of water in that same spot after a drive from home. Finally found it was the condensation dripping from the AC tubes directly above during the humid days. Days when I didn't run AC it was always dry. That was a fun one to figure out. Thought I was losing my mind thinking I had a coolant leak after all that work I had done. Just a thought. I would imagine it's nice and humid where you are. Just not sure if it's AC weather still.
Definitely worth noting, but alas Seattle is not AC kind of weather this time of year
 
#16 ·
#17 ·
So after replacing everything other than the water pump and feeling confident in my handy work I slid the life proof clad iPhone down into the bay to check on the leak after a load from driving a few miles. Sadly it looks to in fact be the water pump as originally suspected=[

Anyone have any recommendations on brand? Rock auto has the mopar part which is a pretty penny; however it looks like gates sells a pump for almost a quarter the price of the mopar WP.

Video of leak attached: http://www.youtube.com/watch?v=m8W0wDabWbk
 
#21 ·
Don't over-think the instructions quoted above saying to dip the gasket in water, it's not required for the 4.0L engine your signature says you have. Maybe the 2.4L uses a slightly different gasket material.

Just make sure that you get every shard/iota of the old gasket material off the thermostat housing and seating surface on the head it bolts to. Use a small wire brush or similar to make sure both surfaces are perfectly clean. Even a barely visible spec of the old gasket material left on either seating surface could cause it to leak.

No, don't use RTV too. :)
 
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