How to: Install/Replace 3.7l Waterpump.

[tjkj2002]

no i need the part that hold the pulley, not a wrench for the nut. i cant hold the pulley in place to remove the nut.

The tool I linked to does not need a holder but you can buy the manual versions that come with a holder.

 

[|V3nom|]

how do you keep the pulley from turning without something to hold it in place with? even with the belt on theres not enough tension to keep it from moving when trying to take off the fan.

 

[tjkj2002]

how do you keep the pulley from turning without something to hold it in place with? even with the belt on theres not enough tension to keep it from moving when trying to take off the fan.

The tool I linked to uses a air hammer,thus no need for a pulley holder as the air hammer with impact it hard enough to loosen with just the tension of the belt.

 

[|V3nom|]

since i didnt have the impact setup i had to get that pin wrench which only napa had and they had to order it. finally got the fan off and was able to replace the water pump without much trouble.

 

[Rocknrollin]

Just replaced my pump in a rest area in southern Mi. No warning other than five miles before I heard a faint squeak when my a/c cycled. Swap was easy, even with borrowed tool kit. I used vice grips on the pully braced against the finns of old waterpump before removal. Hold pressure and tap with hammer Not Bang, just tap. I did remove the electric shroud for the extra room. The only problem I had was that everything I dropped was swallowed by the skid plate

 

[sailorbowman]

Spanner Wrench Substitute

I felt that it was time to chime in with "how it can be done" that might help another brother from a different mother KJ Owner. I just finished replacing the waterpump and thermostat on my 2006 Liberty V-6 3.7 Liter with the heavy duty fan cooling system. (94,000 miles) I did not have a spanner wrench to fit the flywheel on the waterpump, so I installed 2 bolts through the spanner holes (please see attached images) to act as a leverage point for a small bar to facillitate removing the fan nut with a 36 mm wrench. I later discovered that the bolts were long enough to catch on the face of the waterpump and I never needed the bar and could have used only one bolt.

As another poster indicated earlier in this thread, the nut on the cooling fan is NOT left hand threaded as the manual:shooter: suggested.

A side note; I finally found out the easiest way to change the amsoil oil filter, (please see attached image) however it takes removing the shroud, coolant, fan and waterpump. Not a good trade off. :badidea:

 

[rockymountain]

I hope that isn't green coolant I see and just maybe a reflection off of something.

Good tip!!

 

[sailorbowman]

That reflection is the fault of a rather confused sony cybershot thats seen its better days.

 

[Josh]

I did this last night.

The hardest part: getting the radiator hose off . I use to have one of these

You must be registered for see images attach

Craftsman Cable Operated Hose Clamp Pliers

until someone borrowed it and never returned it. It defiantly would have been nice yesterday.

Also getting coolant to draw out of the reservoir did not happen by "Turn engine over briefly (30 seconds or so)" the engine had to run for a while the thermostat had to open up. I knew something wasn't right because I wasn't getting good heat.

Just my 2 cents.

 

[missioncontrol]

Thank you for this write-up. My Liberty's water pump isn't making any noise, and doesn't feel loose when I take the belt off, but is definitely spraying water. I already checked all the hoses.

accompanied with this guy's video, I'm pretty sure I can tackle replacing the pump.

https://www.youtube.com/watch?v=LtIoIB8wuQY

 

[ephantmon]

Going to replace my water pump soon. Excellent, easy-to-follow instructions here + videos on YouTube + Haynes manual = hopefully NOT a debacle. What kind of RTV should I use? I know different colors are for different applications and I don't want to use the wrong type.

 

[rockymountain]

My pump came with a new gasket. No rtv needed.

 

[ephantmon]

My pump came with a new gasket. No rtv needed.

Ok, the one I ordered from Rockauto.com (Bosch) comes with a new gasket, so RTV is only if you re-install the old one?

 

[rockymountain]

I think you HAVE to use the gasket. The gasket snaps into the pumps mating surface. It is more apparent after you see it.

 

[ephantmon]

Right, but the write-up that started this thread AND the Haynes manual both specify RTV use. I plan on using the new gasket that comes with the pump, I'm just trying to figure out how important it is to use RTV as well.

 

[02redKJ]

What is the best way to determine if the water pump is the problem? Is it noise? If so, what does it sound like? Reason I'm asking is, I haven't heard a noise, but I have some coolant showing up under my 02 Liberty. I looked under and below the engine, just below the idler pulley, I see more coolant there. It looks like it is coming from above that. I also see a little coming out of the pitcock as mentioned above. I can't see any fluid around the radiator hoses, or the heater hoses, by the lower radiator hose. Only place i can figure the water is coming out is the water pump. Does that sound logical? Also, how do I stop the leak at the pitcock? Where is the best place to get a water pump for this? I'm a new Jeep owner, so not sure best places to source parts yet!

 

[02redKJ]

What is the best way to determine if the water pump is the problem? Is it noise? If so, what does it sound like? Reason I'm asking is, I haven't heard a noise, but I have some coolant showing up under my 02 Liberty. I looked under and below the engine, just below the idler pulley, I see more coolant there. It looks like it is coming from above that. I also see a little coming out of the pitcock as mentioned above. I can't see any fluid around the radiator hoses, or the heater hoses, by the lower radiator hose. Only place i can figure the water is coming out is the water pump. Does that sound logical? Also, how do I stop the leak at the pitcock? Where is the best place to get a water pump for this? I'm a new Jeep owner, so not sure best places to source parts yet!

 

[KJScott]

I would guess the purpose of doing a thin coat of RTV is more to hold the gasket in place rather than sealing properties. For RTV to be useful in sealing, you would do a bead to substitute for a gasket. But don't do that for a WP. Do that for a dif cover.

02redKJ, are you seeing fluid actually dripping from the petcock? Often the plastic tank to radiator seal is what leaks. Your radiator is aluminum, with plastic sides, and a rubber seal. As for the waterpump, I don't know about the 3.7, but water pumps I have done always had a weep hole, near the pully shaft, if the seal is going bad, coolant will come from that weep hole.

 

[02redKJ]

Did the swap of the water pump tonight using the steps in the OPs 1st post. Spot on. Thank you!

I did replace the water pump without need though. The pump is fine, the leak was coming from the gasket at the bottom of the pump, but since I had it all there I replaced it anyway. I also changed the thermostat, and housing, and the pitcock in the radiator. I flushed the fluid the best I could and will probably drain and refill a few more times over the next month or so. I was able to get the Zerex G-05 at Oreily's Auto parts for 6 bucks less than the Jeep dealer wanted for their version. I will probably replace both radiator hoses in the near future too. They were not in stock, so I didn't do it now. Probably when I drain and refill I will do it.

The fluid does not look green anymore. It looks sort of orange.

 

[Snail Farmer]

Your fluid should never be green.. only use HOAT in this engine.. the G-05 is the right stuff

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