Omega Owners Forum

Omega Help Area => Omega General Help => Topic started by: griffin on 10 September 2011, 11:05:06

Title: Changing a water pump
Post by: griffin on 10 September 2011, 11:05:06
Hi Guys

Quick question when changing a water pump do you have to remove the cam belt?

If not what does need removing

TIA
Title: Re: Changing a water pump
Post by: Andy B on 10 September 2011, 11:16:03
Quote
Hi Guys

Quick question when changing a water pump do you have to remove the cam belt?

If not what does need removing

TIA

On a V6 no. The cam belt sit behind the belt cover while the aux belt (which drives the water pump) sits in front of the cam belt cover. I seem to remember it said the the cam belt cover can remain in place when removing the water pump but I'm sure I removed it when I did my water pump.
(obviously all the bag pipes/induction system needs to come off for access.  :y
Title: Re: Changing a water pump
Post by: griffin on 10 September 2011, 11:31:43
Thank Andy B

So its a job that can be done by a complete novice in a weekend?

 :D
Title: Re: Changing a water pump
Post by: albitz on 10 September 2011, 11:36:28
Yep. :y
Title: Re: Changing a water pump
Post by: griffin on 10 September 2011, 11:38:01
Should it be a genuine vux water pump or are factored ones ok?
Title: Re: Changing a water pump
Post by: noel on 10 September 2011, 12:08:35
if you can afford vauxhall prices then go for it,but i fitted a motor factors one @ about £62 and have had no problems with it  :y
Title: Re: Changing a water pump
Post by: griffin on 10 September 2011, 12:17:29
One final question how long can I run the engine without any water in the system?

 :'(
Title: Re: Changing a water pump
Post by: bigdumper3 on 10 September 2011, 12:18:25
Quote
Thank Andy B

So its a job that can be done by a complete novice in a weekend?

 :D
hi andy, im going to do a waterpump right now, £32 with the vat from gt autos preston. the car just threw the belt off,dont know why,but i noticed waterpump had started to leak
Title: Re: Changing a water pump
Post by: bigdumper3 on 10 September 2011, 12:20:23
Quote
One final question how long can I run the engine without any water in the system?

 :'(
dont, but if you must, 5 mins
Title: Re: Changing a water pump
Post by: Andy B on 10 September 2011, 12:20:39
Quote
One final question how long can I run the engine without any water in the system?

 :'(


Not very long at all. ie to move your car a few feet You'll bugger your engine if you run it for much longer.
Why do you want/need to run your engine without water/coolant?  :-? :-?
Title: Re: Changing a water pump
Post by: griffin on 10 September 2011, 12:21:47
I live in a very narrow cul-de-sac and the AA lorry had t drop the car off in a layby at the end of the road

Title: Re: Changing a water pump
Post by: Andy B on 10 September 2011, 12:22:19
Quote
...
dont, but if you must, 5 mins

5 mins is about 4.5 mins too long really  ::)
Title: Re: Changing a water pump
Post by: Andy B on 10 September 2011, 12:24:48
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I live in a very narrow cul-de-sac and the AA lorry had t drop the car off in a layby at the end of the road


There must still be some water left in there  :-/ Just top it up with water for the short run. If the aux belt has already come off the pump or broken you'll still be better off with some water in the engine if you're just going to move the car.
Title: Re: Changing a water pump
Post by: bigdumper3 on 10 September 2011, 12:28:04
andy, a quick one, why would my belt suddenly fly off the pullys as i was making a right turn, could it be the tensioner
Title: Re: Changing a water pump
Post by: griffin on 10 September 2011, 12:29:01
Its about 100 yards only problem is the water seems to come out quicker than I can fill it!!!

Title: Re: Changing a water pump
Post by: Andy B on 10 September 2011, 12:31:57
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andy, a quick one, why would my belt suddenly fly off the pullys as i was making a right turn, could it be the tensioner

Did it come off or shread itself? Could be your power steering pump slowing up when being asked to work hard with a full lock on  :-/ :-/ :-/ Was the belt on correctly in the first place? It's very easy to get the polly V belts a groove out between the various pullies.
Title: Re: Changing a water pump
Post by: bigdumper3 on 10 September 2011, 12:33:30
you wont do it any damage in a hundred yards, just take it easy
Title: Re: Changing a water pump
Post by: bigdumper3 on 10 September 2011, 12:36:36
belt is intact andy, just fell off,but it took the caseing with it, cant find that. thats when i noticed the water loss, 
Title: Re: Changing a water pump
Post by: Andy B on 10 September 2011, 12:36:48
Quote
Its about 100 yards only problem is the water seems to come out quicker than I can fill it!!!


That's some leak!  :-?

Run your engine for the minimum amount of time that you can.  :y
Title: Re: Changing a water pump
Post by: Andy B on 10 September 2011, 12:38:04
Quote
belt is intact andy, just fell off,but it took the caseing with it, cant find that. thats when i noticed the water loss, 

The water pump casing?? Quuite a failure then!  :-?
Title: Re: Changing a water pump
Post by: bigdumper3 on 10 September 2011, 12:46:58
going out now to do it, fit new pump and put the belt back on for now and see what happens, cheers andy
Title: Re: Changing a water pump
Post by: Varche on 10 September 2011, 15:38:12
Be careful getting the three pump bolts out and putting them back in. It is easy to drop them inside the cam cover casing. A bit of grease on the bolt head helps.
Title: Re: Changing a water pump
Post by: griffin on 10 September 2011, 15:53:40
Ok can I ash the maybe silly questions now.

I've removed the bagpipes etc and have access to the water pump? Is it simply a case of releaseing the aux belt and then unscrewing the pump remove refit and tighten or do I need to remove other components before moving onto the coolant flush and refill stage?

Again any advice greatly appreciated.

 :)
Title: Re: Changing a water pump
Post by: Andy B on 10 September 2011, 16:14:37
Quote
Ok can I ash the maybe silly questions now.

I've removed the bagpipes etc and have access to the water pump? Is it simply a case of releaseing the aux belt and then unscrewing the pump remove refit and tighten or do I need to remove other components before moving onto the coolant flush and refill stage?

Again any advice greatly appreciated.

 :)

Remove the aux belt pulley from the pump to give more access to its bolts.
Title: Re: Changing a water pump
Post by: griffin on 10 September 2011, 16:35:05
Its a bit tight should the plenum come off??

Title: Re: Changing a water pump
Post by: Varche on 10 September 2011, 17:12:52
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Its a bit tight should the plenum come off??

?????

No. Just put a (16mm?) ring spanner on the centre nut of the tensioner for the aux belt. The tensioner is top left looking from front. Then turn it and the whole tensioner swivels and the belt releases enough to pop it off. Perhaps useful to draw where it was routed first. 
Title: Re: Changing a water pump
Post by: griffin on 10 September 2011, 17:16:21
Thanks Varche

Like I said total novice... Probably should'nt even be trying to do this job LOL.. By the way the Waterpump is the big thing bottom centre isn't it (No I'm not joking)!!!

O
Title: Re: Changing a water pump
Post by: Varche on 10 September 2011, 17:27:05
Better to ask than have a problem. i felt embarrassed asking about how to do the ABS ECU a few years back.

We all started somewhere!! Better doing the job properly yourself than paying mega bucks at a garage.

Couple of other things. When you have the belt off just give the tensioner a quick spin by hand shouldn't sound noisy. They can be removed and repacked with grease. Second thing is if you have a new pump to fit when you have attached the body to the engine, next bit is putting the pulley on. Just check that the bolts don't foul the pump body by turning it by hand. Some pumps do. You will need to either fit shorter bolts or spacers like washersso the bolts don't stick out so much. Happened to me once with a QH pump. 
Title: Re: Changing a water pump
Post by: griffin on 10 September 2011, 17:40:15
Thanks for the advice.

Just yo make sure the water pump is behind the big pulley bottom centre!

 :)
Title: Re: Changing a water pump
Post by: dbug on 11 September 2011, 16:34:58
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Thanks for the advice.

Just yo make sure the water pump is behind the big pulley bottom centre!

 :)

Big pulley right at bottem centre is crank pulley - water pump pulley directly above it - only 3 bolts hold pully on and pulley smooth not grooved

Hope that clarifies :y
Title: Re: Changing a water pump
Post by: bigdumper3 on 11 September 2011, 21:02:35
hi boys , done waterpump yesterday. everything ok , no leaks bang on , took about 2 hrs all in . just the cam covers to do and abs/ tc ecu, and im sound . see you later, and thanks andy for the advice.
Title: Re: Changing a water pump
Post by: Andy B on 11 September 2011, 22:24:57
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hi boys , done waterpump yesterday. everything ok , no leaks bang on , took about 2 hrs all in . just the cam covers to do and abs/ tc ecu, and im sound . see you later, and thanks andy for the advice.

I'm off work at the moment if you want a trip to the land of Black Puddings if you need/want a lift with your cam cover(s).  :y :y
Never had the need to remove an ABS ECU but will have the tools to remove it.  :y :y
Title: Re: Changing a water pump
Post by: Entwood on 11 September 2011, 22:31:05
Quote
Quote
hi boys , done waterpump yesterday. everything ok , no leaks bang on , took about 2 hrs all in . just the cam covers to do and abs/ tc ecu, and im sound . see you later, and thanks andy for the advice.

I'm off work at the moment if you want a trip to the land of Black Puddings if you need/want a lift with your cam cover(s).  :y :y
Never had the need to remove an ABS ECU but will have the tools to remove it.  :y :y

Removing it is simple ... it's puting the bloody thing back that is hard .. tools needed..

a) screwdriver
b) patience of a saint
c) mucho change for swearbox
d) assistant to lie on the floor and catch the dropped screws and pass back up for attempt no 40250 ....

easy job really ....  :)
Title: Re: Changing a water pump
Post by: Andy B on 11 September 2011, 22:33:32
Quote
Quote
Quote
hi boys , done waterpump yesterday. everything ok , no leaks bang on , took about 2 hrs all in . just the cam covers to do and abs/ tc ecu, and im sound . see you later, and thanks andy for the advice.

I'm off work at the moment if you want a trip to the land of Black Puddings if you need/want a lift with your cam cover(s).  :y :y
Never had the need to remove an ABS ECU but will have the tools to remove it.  :y :y

Removing it is simple ... it's puting the bloody thing back that is hard .. tools needed..

a) screwdriver
b) patience of a saint
c) mucho change for swearbox
d) assistant to lie on the floor and catch the dropped screws and pass back up for attempt no 40250 ....

easy job really ....  :)

OK then Nige. I'll give bigdumper a lift down to Swindon so you can give him a lift with his ABS ECU  ;D ;D ;D
Title: Re: Changing a water pump
Post by: Entwood on 11 September 2011, 22:52:03
Quote
Quote
Quote
Quote
hi boys , done waterpump yesterday. everything ok , no leaks bang on , took about 2 hrs all in . just the cam covers to do and abs/ tc ecu, and im sound . see you later, and thanks andy for the advice.

I'm off work at the moment if you want a trip to the land of Black Puddings if you need/want a lift with your cam cover(s).  :y :y
Never had the need to remove an ABS ECU but will have the tools to remove it.  :y :y

Removing it is simple ... it's puting the bloody thing back that is hard .. tools needed..

a) screwdriver
b) patience of a saint
c) mucho change for swearbox
d) assistant to lie on the floor and catch the dropped screws and pass back up for attempt no 40250 ....

easy job really ....  :)

OK then Nige. I'll give bigdumper a lift down to Swindon so you can give him a lift with his ABS ECU  ;D ;D ;D


I failed miserably ...this was with the old blue 2.5 miggy ... mechanic mate came over and fitted it back on for me... I was getting desperate .. this was the Saturday .. we were due to sail to France for 16 days on the Monday !!! I think that a swear box (if present) would have been full of all my euros !!!
Title: Re: Changing a water pump
Post by: Andy B on 11 September 2011, 23:21:06
Quote
....

I failed miserably ...this was with the old blue 2.5 miggy ... mechanic mate came over and fitted it back on for me... I was getting desperate .. this was the Saturday .. we were due to sail to France for 16 days on the Monday !!! I think that a swear box (if present) would have been full of all my euros !!!

No point in driving down to you then .....  ;D ;D ;D
Title: Re: Changing a water pump
Post by: Kevin Wood on 11 September 2011, 23:36:03
This is what you need. :y

http://www.halfords.com/webapp/wcs/stores/servlet/product_storeId_10001_catalogId_10151_productId_567017_langId_-1_categoryId_165557