LR4 water pump replacement
8th Gear
Joined: Jun 2015
Posts: 8
Likes: 1
From: Wake Forest, NC
Thanks everyone who has contributed their experience in this thread. I replaced my water pump today and found your input was very helpful. I was particularly careful with the small bleed pipe as some have had it break.
I was unable to get the fan off. I have the spanner wrench I bought for my LR3 a few years back that despite being the correct size leaves just enough play to slip off rounding off the nut.. not good. I had ended up buying a combo wrench that worked great on the LR3 but did not fit the LR4 since there isn't much space for the thicker wrench and pulley tool. I didn't have luck with the combo wrench and hammer either so I decided to go ahead and try without taking off the fan and it wasn't too bad. I may try buying another spanner and see if I just got a bad one.
Biggest problem I had was getting the large short hose off the water pump.. ended up using a flat head screw driver to wedge under the hose and worked around to help it off.
I was unable to get the fan off. I have the spanner wrench I bought for my LR3 a few years back that despite being the correct size leaves just enough play to slip off rounding off the nut.. not good. I had ended up buying a combo wrench that worked great on the LR3 but did not fit the LR4 since there isn't much space for the thicker wrench and pulley tool. I didn't have luck with the combo wrench and hammer either so I decided to go ahead and try without taking off the fan and it wasn't too bad. I may try buying another spanner and see if I just got a bad one.
Biggest problem I had was getting the large short hose off the water pump.. ended up using a flat head screw driver to wedge under the hose and worked around to help it off.
2nd Gear
Joined: Jan 2015
Posts: 2
Likes: 0
Part
Thanks
Stuart
6th Gear
Joined: Dec 2017
Posts: 6
Likes: 0
From: Biloxi, MS
Yes, I just removed the top hose, I saw no need to drain all the coolant from below, as the car has been leaking coolant from the water pump down the engine block ever since I bought it in June. When I removed each hose I lost a quart or so each time, which I caught in a large tray under the engine. No need to get under the car at all (except when retrieving dropped tools). The coolant top up used about 1.1 gallons.
How do you remove and replace the plastic 90 piece?
(I didn't even remove the fan as my fan wrench has not yet arrived from Amazon, but it would have been easier with the fan removed.)
How do you remove and replace the plastic 90 piece?
(I didn't even remove the fan as my fan wrench has not yet arrived from Amazon, but it would have been easier with the fan removed.)
Drifting
Joined: Nov 2015
Posts: 48
Likes: 15
I also didn't remove the fan for exactly the same reason. Please view the sticky DIY thread I wrote for waterpump replacement.
6th Gear
Joined: Dec 2017
Posts: 6
Likes: 0
From: Biloxi, MS
Still leaking.
i replaced the pump and the themosatat splitter tube that goes under the manifold. What else could be leaking? Can I replace the back pipe under the manifold or is that a dealer only part replacement? What is the part number? Anyone have pictures and DIY information if it is replaceable. I don’t want to blow up engine, but don’t have money to pay dealer to go fishing either. Thanks again.
Last edited by tphoodpack; Mar 11, 2018 at 09:51 PM. Reason: Need to add something.
6th Gear
Joined: Oct 2018
Posts: 6
Likes: 0
Water leak around water return from pump (pressure fitting)
Hello all,
New to the forum here, and just installed a new water pump and updated to the new two hose design (I didn't have an option as I broke the brittle elbow from the water pump). In fitting the new hose design where the water pump connects with the small pressure fitting, I am getting water leakage on pressure test and running engine. I've disconnected and reconnected multiple times and can't seem to get the fitting to seal. Anyone have any tricks or suggestions?
New to the forum here, and just installed a new water pump and updated to the new two hose design (I didn't have an option as I broke the brittle elbow from the water pump). In fitting the new hose design where the water pump connects with the small pressure fitting, I am getting water leakage on pressure test and running engine. I've disconnected and reconnected multiple times and can't seem to get the fitting to seal. Anyone have any tricks or suggestions?
6th Gear
Joined: Oct 2018
Posts: 6
Likes: 0
You can/should replace the small pipe behind the water pump. That is often the source of leaks- this leads to the oil cooler. I picked one up for about $24 from the dealership. Make sure you also get the o-ring that goes around the pipe that leads to the oil cooler (its about $8 and will save you from having to do the job all over again).
2nd Gear
Joined: Aug 2019
Posts: 2
Likes: 0
Leak after replacement
Hi. My husband replaced the water pump, belts, oil cooler tube & o-rings, flushed and refilled radiator. He finished yesterday. Haven’t started it because there is a transmission fluid slowly dripping from close to where the engine meets the passenger compartment. He thinks it could be the replaced oil cooler tub o-rings or the crossover pipe. Any thoughts? TIA!
Kim
Kim
