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Author Subject: Water Pump failure?
MCH_GTi6

formerly mch

Location: Hayle

Registered: 09 Sep 2005

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Post #1
Just wondered if waterpumps failing was a common thing or not?


Is there much of a way to check besides brimming the rad and rev the engine to see if the level goes down? (if its impeller failure)

My belt/tensioners/pump arent due for a few miles yet (not too far off) and today the temp went right up but rad was stone cold, so was the inlet but the head was quite hot...

Checked levels in the rad and all levels were ok, no mayo on oil cap or dipstick and haven't driven since...

The current pump is a Genuine (new old stock) which is due in about 5-10k (depending on varied recomendations of "safe" mileage allowance)...

I have everything to change in the garage ready (again genuine pump & belt kit)...

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Posted 9th May 2012 at 22:24
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stan_306gti6 Forum Admin

Location: Kent

Registered: 18 Jan 2004

Posts: 21,768

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Post #2
Have you tried bleeding the system, maybe you have an airlock?

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"Supercharged - 454.1bhp/317.5lb/ft"
Peugeot 306 GTi-6
2000 (X), Moonstone Love
Posted 9th May 2012 at 22:29
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Rich E Forum Admin

Location: Hertfordshire

Registered: 27 Apr 2005

Posts: 7,757

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Post #3
In reality OE water pumps are good for around 80-100k at least, so I doubt you've got a dodgy pump. The Peugeot guidance is to inspect on belt changes and change if required.

It will most likely be an airlock or a jammed thermostat. Give it a proper bleed and see what happens.

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Rich
Posted 9th May 2012 at 22:29
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MCH_GTi6

formerly mch

Location: Hayle

Registered: 09 Sep 2005

Posts: 2,456

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Post #4
I'll have a crack at that asap

Would you guys recommend taking the thermostat out completely while I try and find the problem?

Obviously replace it with a new one as soon as possible.

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Posted 9th May 2012 at 22:31
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Rich E Forum Admin

Location: Hertfordshire

Registered: 27 Apr 2005

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Post #5
I'd just bleed it first and see what happens, and obviously keep a close eye on the temperature gauge immediately afterwards.

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Rich
Posted 9th May 2012 at 22:33
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darkgti6

Seasoned Pro

Location: Bracknell

Registered: 07 Jun 2008

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Post #6
MCH_GTi6 wrote:
I'll have a crack at that asap

Would you guys recommend taking the thermostat out completely while I try and find the problem?

Obviously replace it with a new one as soon as possible.


You could whip it out and test it? If you have an old saucepan fill it with water and suspend it on a piece of wire or something suitable then apply heat, when you get close to the boil pull it out and have a gander at it you will see if its opened up or not

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Posted 9th May 2012 at 22:34
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fatlapit

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Location: STOCKSFIELD

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Post #7
Defo thermostat

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Posted 9th May 2012 at 22:42
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MCH_GTi6

formerly mch

Location: Hayle

Registered: 09 Sep 2005

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Post #8
it was odd as there were no signs of any overheating at all leading up to it, just all of a sudden temp rocketed so I stopped and checked...

Let it cool and then drove back home, wasnt til I got a very short distance from home it did it again, the rest of the journey it had been between 70 and 90 consistantly...

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Posted 9th May 2012 at 22:42
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stan_306gti6 Forum Admin

Location: Kent

Registered: 18 Jan 2004

Posts: 21,768

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Post #9
As said, either an airlock or faulty stat. Yes

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"Supercharged - 454.1bhp/317.5lb/ft"
Peugeot 306 GTi-6
2000 (X), Moonstone Love
Posted 9th May 2012 at 22:45
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MCH_GTi6

formerly mch

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Registered: 09 Sep 2005

Posts: 2,456

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Post #10
Hopefully its simply an airlock (although strange seems it was properly bled before) or the stat...

I'd prefer to replace the belt/tensioners/pump when I'd planned as its a bit of a ballache to have to do that at the moment.

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Posted 9th May 2012 at 22:47
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bigbadbowen

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Location: Winchester

Registered: 21 Nov 2003

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Post #11
You can run the engine fine with out the thermostat all though I used to cut away the spring bit and leave the seal etc in ? Yes only snag is you don't get much warm air No
Posted 9th May 2012 at 23:00
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Rich E Forum Admin

Location: Hertfordshire

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Post #12
The trouble with that is the ECU uses the coolant temperature for the cold start fuel mixture enrichment, so if you're over-cooling the engine then you will be over-fuelling it too Yes

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Rich
Posted 9th May 2012 at 23:08
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bigbadbowen

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Post #13
I should have mentioned I was using this in my race engine that had stand alone ecu Whistle
Posted 9th May 2012 at 23:22
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stan_306gti6 Forum Admin

Location: Kent

Registered: 18 Jan 2004

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Post #14
bigbadbowen wrote:
I should have mentioned I was using this in my race engine that had stand alone ecu Whistle


It's still not good, an engine has an "optimum" running temperature and having a thermostat ensures it stays at this all the time once warmed up from cold...
If you remove it, the engine will run cooler than it should, and therefore it is not running as efficiently as it should be. Bad practice IMO. Yes

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"Supercharged - 454.1bhp/317.5lb/ft"
Peugeot 306 GTi-6
2000 (X), Moonstone Love
Posted 10th May 2012 at 07:06
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MCH_GTi6

formerly mch

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Post #15
It would only be for a very short time

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Posted 10th May 2012 at 09:49
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welshpug!

Capt Pedantic

Location: Bigend, Wales.

Registered: 27 Mar 2007

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Post #16
just stick a new one in.

you can't run without as the seal will not seal properly without the thermostat in place.

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Posted 10th May 2012 at 10:25
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MCH_GTi6

formerly mch

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Post #17
right thats what I wanted to know, because if I couldnt get one today (which I cant) I was gonna see about just running without for 1 day till it arrived but if it wont seal there is no point.

I'll get one ordered and it'll just have to sit there til it comes

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Posted 10th May 2012 at 10:45
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MCH_GTi6

formerly mch

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Registered: 09 Sep 2005

Posts: 2,456

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Post #18
Right I went out and started it up...

Looked in the rad and the level looked quite low so topped it up (before starting), when I started it the level rose and its overflowing and chucked what i just put in back out...

Theres no creamy stuff on either the oil cap or on the dipstick... BUT there did seem quite a bit of whiteish smoke (but first start of the day and not very warm out)

I'm dreading head gasket

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Posted 10th May 2012 at 12:57
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welshpug!

Capt Pedantic

Location: Bigend, Wales.

Registered: 27 Mar 2007

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Post #19
sounds like it, the last 3 HG's I did had not mixed water with oil or had any mayo and suchlike at all.

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need a part number? get on here - http://public.servicebox.peugeot.com

Bring on the Trumpets.

Posted 10th May 2012 at 13:04
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MCH_GTi6

formerly mch

Location: Hayle

Registered: 09 Sep 2005

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Post #20
balls...

What could of caused it? as had no overheating before hand, no running issues...

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Posted 10th May 2012 at 13:08
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welshpug!

Capt Pedantic

Location: Bigend, Wales.

Registered: 27 Mar 2007

Posts: 25,817

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Post #21
old age!

________________________________________

need a part number? get on here - http://public.servicebox.peugeot.com

Bring on the Trumpets.

Posted 10th May 2012 at 13:14
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MCH_GTi6

formerly mch

Location: Hayle

Registered: 09 Sep 2005

Posts: 2,456

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Post #22
the gasket isnt that old really... as it had a belt snap on the previous owner... its 60k old probably less I'd have to check the paperwork...

My dads bringing a pressure tester home tonight so will check that way...

Spose it'll only cost me the price of gasket and bolts... as already got belt kit & pump and a filter and oil sitting waiting for next service

*edit* and cost of a skim Thumbs down

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Posted 10th May 2012 at 13:17
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welshpug!

Capt Pedantic

Location: Bigend, Wales.

Registered: 27 Mar 2007

Posts: 25,817

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Post #23
yup, as you've already got the belt etc there's a fair chunk of the parts already sourced, but its the labour for stuff like head pressure test etc that you can't go without, unless you're a poikey kent LOL

hopefully it wasn't skimmed or if it did it didn't have much taken off last time.

________________________________________

need a part number? get on here - http://public.servicebox.peugeot.com

Bring on the Trumpets.

Posted 10th May 2012 at 14:12
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MCH_GTi6

formerly mch

Location: Hayle

Registered: 09 Sep 2005

Posts: 2,456

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Post #24
well I can get it skimmed for £30

Have the belt, tensioners, waterpump, oil filter and oil...

Need to buy gasket and headbolts (got ptfe gasket) but should get an exhaust gasket i spose and poss bolts.

Dad is a mechanic so is bringing a pressure tester home from work... me and him did my last belt change together so £0 labour.

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Posted 10th May 2012 at 14:14
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welshpug!

Capt Pedantic

Location: Bigend, Wales.

Registered: 27 Mar 2007

Posts: 25,817

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Post #25
no point skimming if the head fails a pressure test Wink

________________________________________

need a part number? get on here - http://public.servicebox.peugeot.com

Bring on the Trumpets.

Posted 10th May 2012 at 14:42
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