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LR4 Waterpump - How to check for failure?

- - - - - LR4 Discovery water pump clamp loose drip drip drip

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11 replies to this topic

#1
erinw.rrc

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So, how does one check if the water pump on an LR4 is going out?  First, I've check for a coolant leak, I have one, but not attributed to this.  It's leaking from some hose clamps that were use to modify the lines to the rear of the vehicle during the tire and spacers modification two years ago.  Will look into this separately.

 

Secondly, there is a low rumble vibration at idle, that is intermittent, but I haven't determined where it's coming from yet.  Anyway, my goal is find out what this noise is and where it's coming from. 

 

Thanks,

 

Erin


Erin W.
"Jack Sparrow" 2012 Ipanema Sand LR4 HSE LUX; 18" LR3 Wheels, Johnson Rods, 30mm spacers, LT275/65R18 Cooper Discoverer A/T3, Baja Rack, Custom rear Kaymar bumper, factory Warn Winch kit for LR4, factory brush guard, Iron Man rear light, Hi-lift jack (recently mounted :D)
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#2
Jethro

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Mine just went out, started leaking from the front of it. Started off really slow then when leaving last month's DITD the reservoir was empty.

Not sure on a noise with these as it's definitely near other noisy elements.

I have learned that it is definitely an 85k mileage item give or take 5k miles.

So look at your mileage too, I was lucky and warranty covered it. Total cost was $1500.

#3
TomOwen

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Mine just went out, started leaking from the front of it. Started off really slow then when leaving last month's DITD the reservoir was empty.

Not sure on a noise with these as it's definitely near other noisy elements.

I have learned that it is definitely an 85k mileage item give or take 5k miles.

So look at your mileage too, I was lucky and warranty covered it. Total cost was $1500.

Yup, while there are folks here that know for more than I on this, the old "weep the pour" is an initial indicator, which generally get's water in the bearings so it begins to make noise, vibrate, etc..  The only thing not mentioned is if you can "wiggle" the fan. Since it is mounted to the pump shaft, it could give you an indication of the bearings... 

 

Good luck Erin! 


  • erinw.rrc likes this

:lr:
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#4
DHappel

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A failing bearing in the waterpump will cause a 'rumble' or 'grumble' sort of noise.  It's generally not intermittent though.  It will be easiest to hear from outside with the hood up and will change with engine speed.  The tough part is anything being turned by the belts could also be making that sort of noise (alternator, idler, air con pump, etc) so it's hard to isolate it.  I have a mechanic's stethoscope that helps but isn't 100%  The old-timer way to do it was to take a long screwdriver and place the end against the part you suspect and the hold the handle against your skull just behind the ear.  The noise makes a vibration that gets transmitted up the screwdriver and directly to your ear in the same sort of way a stethoscope does, just not as well.

 

Additionally, any bearing can make that sort of noise when failing.  Wheel bearings in particular are a common noise maker when they start to go.  They are often a little louder when turning one way to the other since you load each side a bit more when turning.  A wheel bearing will change noise with road speed and not make any difference with engine speed.

 

Another possible source could be a driveshaft.  Yet another is a differential.  Both of these would be road speed dependant instead of engine speed.

 

There's a lot of things it 'could' be, and without hearing it it's pretty much a guess.  Even if I do hear it sometimes it's still a guess!

 

 

(Here's where I'd like to think doctors are more precise than mechanics, but from what I've heard from some of them they too are just taking an educated guess far more often than you'd like to believe  :blink: )


  • erinw.rrc likes this

Don
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#5
erinw.rrc

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Mine just went out, started leaking from the front of it. Started off really slow then when leaving last month's DITD the reservoir was empty.

Not sure on a noise with these as it's definitely near other noisy elements.

I have learned that it is definitely an 85k mileage item give or take 5k miles.

So look at your mileage too, I was lucky and warranty covered it. Total cost was $1500.

 

My truck has 53k miles and is out of warranty.  So this will an expensive fix if that's what it is. 


Erin W.
"Jack Sparrow" 2012 Ipanema Sand LR4 HSE LUX; 18" LR3 Wheels, Johnson Rods, 30mm spacers, LT275/65R18 Cooper Discoverer A/T3, Baja Rack, Custom rear Kaymar bumper, factory Warn Winch kit for LR4, factory brush guard, Iron Man rear light, Hi-lift jack (recently mounted :D)
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#6
erinw.rrc

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Yup, while there are folks here that know for more than I on this, the old "weep the pour" is an initial indicator, which generally get's water in the bearings so it begins to make noise, vibrate, etc..  The only thing not mentioned is if you can "wiggle" the fan. Since it is mounted to the pump shaft, it could give you an indication of the bearings... 

 

Good luck Erin! 

 

I will check this when I get home.  Thanks Tom!


Erin W.
"Jack Sparrow" 2012 Ipanema Sand LR4 HSE LUX; 18" LR3 Wheels, Johnson Rods, 30mm spacers, LT275/65R18 Cooper Discoverer A/T3, Baja Rack, Custom rear Kaymar bumper, factory Warn Winch kit for LR4, factory brush guard, Iron Man rear light, Hi-lift jack (recently mounted :D)
IMG_1172.JPG


#7
RedRover

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The old-timer way to do it was to take a long screwdriver and place the end against the part you suspect and the hold the handle against your skull just behind the ear.  The noise makes a vibration that gets transmitted up the screwdriver and directly to your ear in the same sort of way a stethoscope does, just not as well.

 

This sounds like the same tech used for those bone-conduction headphones that are for sale now.

 

Old tech becomes new tech....


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Jared (KJ6MQI)
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#8
GraemeWare

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My truck has 53k miles and is out of warranty.  So this will an expensive fix if that's what it is. 

 

Erin,

 

I hear RoverWare.US can do them very cost effectively .... which engine do you have in that thing?

 

Graeme


Graeme Ware -- San Carlos, CA

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#9
erinw.rrc

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Erin,

I hear RoverWare.US can do them very cost effectively .... which engine do you have in that thing?

Graeme


Graeme,

It is a 5.0L V8 Jag engine. However after troubleshooting with a coworker after work, we think the noise is coming from the rear of the truck. Still not sure what it is though. Might take it to Don's this weekend and see if we can figure it out. I will let you know if we need any parts.

Thank you!

Erin


Sent from my iPhone using Tapatalk

Erin W.
"Jack Sparrow" 2012 Ipanema Sand LR4 HSE LUX; 18" LR3 Wheels, Johnson Rods, 30mm spacers, LT275/65R18 Cooper Discoverer A/T3, Baja Rack, Custom rear Kaymar bumper, factory Warn Winch kit for LR4, factory brush guard, Iron Man rear light, Hi-lift jack (recently mounted :D)
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#10
JFuller

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You can pick up a mechanics stethoscope from harbor freight. It's inexpensive and if you're not trying to use it all the time it will do just fine. You'll want to touch it to the case of each rotating piece like water pump, alternator, power steering pump, belt tensioner, ac compressor and any other Land Rover magical device being belt driven. The loudest one will be your culprit. Don't forget to check for debris fouling the fan like sticks and leaves and such and also take a look at your power steering reservoir level. It's likely something you can fix yourself.
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#11
Gotrovr

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the sound is Lucas saying hello


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Will

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Building a life journey one puzzle piece at a time

 


#12
erinw.rrc

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So my waterpump is fine... so far.  Leak turned out to be coming from the rear.  The hose was coming loose. 


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Erin W.
"Jack Sparrow" 2012 Ipanema Sand LR4 HSE LUX; 18" LR3 Wheels, Johnson Rods, 30mm spacers, LT275/65R18 Cooper Discoverer A/T3, Baja Rack, Custom rear Kaymar bumper, factory Warn Winch kit for LR4, factory brush guard, Iron Man rear light, Hi-lift jack (recently mounted :D)
IMG_1172.JPG






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