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Gtir Motorsport club » Tech room » frequently asked Qs / how to guide » How to change water pump

How to change water pump

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1 How to change water pump on 4th December 2014, 7:33 pm

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Hi guy's,a requested:-

1)Tighten the powersteering belt bit buy bit until you can loosen the bolts that hold the pulley to the pump.Do this with the engine mount removed as you wont get your had in.

2)Remove the lower section of the engine mount that is fixed to the block,as this greatly increases the space for you to work and iirc you can get at all the bolts on the pump bar one.

3)When you have replaced the pump an are ready to put the pulley back on,use a thin cable tie through one of the holes in the pulley and one of the holes in the pump and pull it tight,this will hold the pulley in place while you get the other three bolts in.Then remove the cable tie for the fourth bolt.

4)Re-tighten the bolts on the pulley after re-placing the belts so you can overtighten the powersteering belt to stop the pulley moving.

HOW TO:

You will need a tube of 'Instant Gasket' or water pump sealant and yo may as well change the drive belts whilst they are off.. only bout £5 each

I chose to disconnect the bottom rad hose to drain the system and then push the car into the garage before starting, this is so you dont have to lay in coolant

Chock the back wheels.
Remove the front drivers side wheel using an axel stand to support the car, try not to have the car too high on the axel stand as you will need to raise and lower the engine using a jack which may prove difficult if the car is too high.
Remove the Inner wing splash guard (drivers side) and splash tray under the engine.

Inside the engine bay remove the coolant expansion bottle.
Slacken off the alternator drive belt tensioner and remove the belt.
Slacken off the power steering pump belt tensioner and remove the belt, i found it easiest to use a long extension bar and ratchet to reach teh tensioner. The PS tensioner slackens off by screwing the tensioner bolt inwards rather than outwards like the Alternator/aircon tensioner.
The Drivers side engine mount is removed to allow the engine to be raised and lowered to get to the pump bolts easier.
Place a jack with a good size block of wood under the engine sump and gently jack the engine up until the jack is just starting to take the weight of the engine.
Where you removed the Coolant bottle you will see an engine mounting..
Firstly slacken off the single bolt that passes through the middle by half a turn.
You will also see three bolts holding the mount to the engine, remove these three bolts making sure that the jack is taking the weight of the engine.. The three bolts should not be forced when undoing, if the are too tight once slackened off then raise the jack slightly to take the stress off of the bolts..
remove the centre mounting bolt and remove mount.
Once this mounting is off lower the engine bit by bit, stopping to check clearance as you lower it. The engine can be lowered roughly 4 inches.
With the jack locked look into the wheel arch and you will see the bottom of the water pump, just to the top left of the Crank pulley.

It is easier to remove the water pump pulley before removing the pump.
I used a lever to stop the pulley turning whilst loosening the 4x 10mm bolts that hold the pulley to the pump, once the bolts are undone teh pulley just drops off.
With pulley removed you will see 4 of the 7 bolts that hold the water pump to the block, using a small (3/8 drive) ratchet undo them.
Once undone use the jack to raise the engine, making sure again that nothing is trapped or squashed, keep jacking up about 3 inches higher than the orginal height or just before the plenum chamber touches the bulkhead.
You will be able to see the top 3 bolts for the pump now, undo them.

Remove the tensioner for the PS belt, 2 water pump bolts hold it on and one single bolt onto the PS pump.

Before removing the water pump i slid the PS reservoir out of its slot and unbolted the bracket which holds the pipes to the inner wing/chassis, this gives you more room to get the pump out..
Once you have removed all of the bolts from teh pump, give each bolts thread a clean with a wire brush to remove any old sealant.

Although the Pump is unbolted it is still held on quite tight by the old sealant, using a long drift and a small hammer give the pump a tap on the shaft area to crack the seal.
With the engine still raised withdraw the pump, the PS pipes need a little bit of movement to remove the pump from the top.
As far as i am aware the pump will not come out the bottom (i did try)

Once the pump is removed make sure that the new pump matches it
Where the pump mates with the block will be old sealant, using a sharp stanley blade (be careful) remove any traces of old sealant, making sure you do not score the mating surface.. Use a cloth to wipe of the sealant that is removed.

once you are happy that the block surface is clean apply approx 2/3mm thick sealant onto the new water pump sealing areas, do not over apply the sealant as any excess sealant will get trapped in the coolant system.

I found it best to do a 'dummy run' of getting the old pump back in without touching any parts to which way would be best to fit the new pump, without getting sealant everywhere.. you will see what i mean when you get to this point!!

Once you are happy to replace the pump and the sealant is applied correctly and evenly have a pump bolt handy to screw in once you have located the pump.
Try not to lose any sealant whilst relocating the pump back into the engine bay as this will not only make your engine bay look untidy but it will also mean the seal may not be adequate.
Once the pump is located properly screw in the bolt at the top of the pump by hand, once you have done this replace the PS belt tensioner and screw in the other two top bolts by hand but not ratchet tight.
Making sure the pump will not dislodge, lower the engine again so that you can get to the pump lower bolt holes, screw in the 4 remaining bolts by hand and then tighten them up using a ratchet, do not over tighten them (they aint wheel nuts) and then raise the engine back up again to tighten the top bolts.

Now that the pump is secured, refit the pulley onto the pump using the same method to undo it.

lower jack so that engine is just below original height and locate engine mounting, screw the centre bolt through the mounting by hand but do not tighten yet.
Raise engine slightly to line up the mounting holes with the engine and screw in 3 mounting bolts. Tighten all 4 mounting bolts with ratchet.

Lower jack slowly to let engine mounting take the engine weight and then remove jack.

replace PS/water pump belt and tighten belt by screwing tensioner outwards (anti clockwise) until belt is correct tension.
Replace Alternator belt and tension correctly.
Replace coolant expansion bottle.

Replace bottom rad hose and refill coolant system using correct ratio of Antifreeze, and bleed.

I may have missed something so please correct anything missed, am off tothe pub and running late.. god i need to type faster!!


p.s. this may sound like a hard job but the only reason i have wrote so much is to try and put it in simple DIY terms.. for poeple like me.
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2 Re: How to change water pump on 4th December 2014, 7:46 pm

nomad

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Well done deane top job Wink a rep point on its way goodpost


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3 Re: How to change water pump on 4th December 2014, 8:31 pm

Guest


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Lol thanks nomad, had a modifiers account so looking through it atm and seeing what I can find but takes well to long lol so just picking things that I know ain't on here

4 Re: How to change water pump on 4th December 2014, 8:39 pm

gtir_woody

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I'll stop copying and formatting this information from modifiers then Laughing

5 Re: How to change water pump on 15th October 2016, 2:17 pm

Stu

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Just used this how to Smile
Didnt follow it buy the word but some of the info was very useful Smile


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6 Re: How to change water pump on 15th October 2016, 9:44 pm

nomad

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Did your pump go then stu ???


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7 Re: How to change water pump on 15th October 2016, 9:52 pm

Stu

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@nomad wrote:Did your pump go then stu ???
It started to leak out of the hole mate.
Most times when i parked up i would come back out the house to find a small puddle under the car.
I was topping it up every other day with around 500 ml of water.


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8 Re: How to change water pump on 15th October 2016, 10:26 pm

nomad

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Dont they do that if they been sitting around for a while ...


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9 Re: How to change water pump on 16th October 2016, 5:00 am

johnny gtir

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There was something wrote about this once possibly by bob.it was maybe the freezing of winter and core plugs blowing and that hole. But I see to remember it been a pressure release valve/hole or something ? I think you have a problem Stu mate. It burst hoses you fitted strong Samco ones now that hole is next week point. I think something's pressuring your system ?

10 Re: How to change water pump on 16th October 2016, 7:23 am

Mr B

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gtir technician
gtir technician
That hole is drain relief for pump seal when fails, nothing more to it than that .
on age of these things all cooling pipes & pump seal close to end of its life if original thus lot of problems, plus it quite common for a pump leak after other cooling work as fresh water and antifreeze finds it way past a poor seal easier ...
worth checking rad cap not a corroded mucky mess and collar depresses freely against spring.


Pumps not as cheap & easy find as was year or 2 ago, ADN19141 could be had for £35

here's a list of cross ref numbers, may help someone, oem pump only about £60 if lucky .

AISIN WPN069
BGA CP6694T
BLUEPRINT ADN19141
BORG & BECK BWP1632
FIRST LINE FWP1632
HUCO 133621
JWP NW3265
KAGER 331002
KAISHIN GWN48A
KAVO PARTS NW3265
NISSAN 2101054C00
NPS N151N45
QH TALBROS QCP3347
QUINTON HAZELL QCP3347
SOLID AUTO (UK) N123042

11 Re: How to change water pump on 16th October 2016, 8:01 am

gtir_woody

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Awesome, rep given mate, even though you too many Laughing

12 Re: How to change water pump on 16th October 2016, 8:15 am

Mr B

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gtir technician
gtir technician
^

13 Re: How to change water pump on 16th October 2016, 8:57 am

Stu

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Admin
Admin
Yeah as Mr B says. If the pump is leaking then the bearing seal has been breached.



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14 Re: How to change water pump on 16th October 2016, 10:37 am

Mr B

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gtir technician
gtir technician
hope your drive stays free from wet patches unless from uk weather lol .
have fun stu ...

15 Re: How to change water pump on 16th October 2016, 11:27 am

Stu

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@Mr B wrote:hope your drive stays free from wet patches unless from uk weather lol .
have fun stu ...
Me too B lol
Swapping out the pump was easier than i thought. Only took just over an hour to complete the job Smile


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16 Re: How to change water pump on 16th October 2016, 12:24 pm

Mr B

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gtir technician
gtir technician
it not bad once got working method and use to gtir engine bay space.
1hr is quick .
I always preferred ADN pump for in car fitting as came with wax paper gasket which I rubbed lightly with grease so stayed in place easily and easier than dealing with sealant in confined space .

17 Re: How to change water pump on 16th October 2016, 1:56 pm

Stu

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Admin
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@Mr B wrote:it not bad once got working method and use to gtir engine bay space.
1hr is quick .
I always preferred ADN pump for in car fitting as came with wax paper gasket which I rubbed lightly with grease so stayed in place easily and easier than dealing with sealant in confined space .
I used two jacks rather than having the car high up on axle stands.
Just put axle stand under while i was under the car for the bottom 4 bokts and the 4 pulley bolts.
Its pretty straight forward to be fair.
There was just enough room to get the pump in with sealant on. A bit tricky but managed it without getting sealant everywhere lol
The gti pumps have a gasket so i was surprised the gtir one didnt.


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18 Re: How to change water pump on 16th September 2017, 6:51 am

92pulsar

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Topped with some new antifreeze and low and behold my water pump is leaking will pump from any other nissan fit on R

19 Re: How to change water pump on 16th September 2017, 7:29 am

ROB_IOW

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the two star club
the two star club
Get one from Nissan they are only about £60

20 Re: How to change water pump on 16th September 2017, 7:30 am

92pulsar

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Im in canada nissan might not stock them

21 Re: How to change water pump on 16th September 2017, 8:08 am

gtir_woody

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@92pulsar wrote:Topped with some new antifreeze and low and behold my water pump is leaking will pump from any other nissan fit on R

Specific to R I believe?

http://nissan4u.com/parts/info/2101054C00/

22 Re: How to change water pump on 16th September 2017, 8:11 am

92pulsar

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Saw that too but from same site rear pads only show for R but g20 pads perfect fit

23 Re: How to change water pump on 16th September 2017, 8:27 am

gtir_woody

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Im not sure but I think the design of the water pump cover wont let you use one from another SR. Someone else might be able confirm as I'm not 100% from memory.

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