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Old 27-06-2017   #16
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Re: How long does a metal vaned water pump last?

Quote Originally Posted by g8rpi View Post
The first issue is of course getting hot water blown back at you, examples being a thermostat opening or airlock releasing. You need the engine running to circulate the water.
Other issue is that coolant is toxic.


I have of course never done this myself


Robert G8RPI.


Hehe. Well so far I've only ever done it on cold engines and not experienced these things. Would be interested in a tool to do this, might make life easier
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Old 27-06-2017   #17
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Re: How long does a metal vaned water pump last?

Quote Originally Posted by g8rpi View Post
The first issue is of course getting hot water blown back at you, examples being a thermostat opening or airlock releasing. You need the engine running to circulate the water.
Other issue is that coolant is toxic.


I have of course never done this myself


Robert G8RPI.
Big issue is it tastes disgusting.....I imagine

Don't leave any open containers of it around, bowls you have drained it into etc
Pets and other animals are attracted to it's sweet smell and drink it. It only takes a teaspoon full or so to kill a cat for example. Death from liver failure very nasty.

On the panda mk1 , heater hose fill and bleed method is probably cleanest.
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Old 27-06-2017   #18
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Re: How long does a metal vaned water pump last?

I would say it is the gauge showing wrong temperature.
First red is at 120*C if rad fan kicks in more ish around same place-all is FINE apart from the wiring.
You would not get too far with engine at 120 degrees C.
Iirc stick 2.7k Ohm resistor inline and check the dial indication.
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Old 28-06-2017   #19
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Re: How long does a metal vaned water pump last?

Thanks the help so far.
I am minded to flush and refill the whole system at the weekend.
I'll report back
If the problem is still there after that, maybe replace the thermostat and water pump (and timing belt whilst I am at it)
Hopefully flush and refill will work though
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Old 28-06-2017   #20
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Re: How long does a metal vaned water pump last?

Quote Originally Posted by Torridon1 View Post
Thanks the help so far.
I am minded to flush and refill the whole system at the weekend.
I'll report back
If the problem is still there after that, maybe replace the thermostat and water pump (and timing belt whilst I am at it)
Hopefully flush and refill will work though
May I suggest you check for air in radiator being the problem first?
If that's the problem at least you will know.
Flush and refill after that good idea anyway.
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Old 28-06-2017   #21
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Re: How long does a metal vaned water pump last?

I will re-read the instructions and give it a go at the weekend
Thanks
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Old 01-07-2017   #22
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Re: How long does a metal vaned water pump last?

I bled the radiator and the problem was still there. So I drained the coolant and flushed the system and then refilled.

Strangely as I re filled the coolant bottle, the liquid did not flow into the system but stayed in the bottle. Squeezing the top and bottom pipe had little effect. So I blew in to the top of the bottle (avoiding blow back) and the liquid level in the bottle dropped a little. I had to repeat this process several times to get enough coolant into the system to get it to come out of the 2 bleed points.

Then I ran the car expecting the level in the bottle to drop so I could re-bleed, but the level didn't drop very much at all. So I got the car up to temperature and the problem overheating is still there. Top and bottom pipes hot, radiator hot, heater hot.

I got the strong impression that the coolant just isn't circulating very much, if at all. So I assume this is either the water pump or the thermostat or a blockage somewhere?

Should I start with replacing the thermostat?

Thanks
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Old 02-07-2017   #23
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Re: How long does a metal vaned water pump last?

I still think that if the fan isn't coming on until it's nearly hitting red that either the fan switch or the dash gauge is wrong. If it was the thermostat or pump the fan should still be cutting in around 95C or so...
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Old 02-07-2017   #24
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Re: How long does a metal vaned water pump last?

Quote Originally Posted by Torridon1 View Post
I bled the radiator and the problem was still there. So I drained the coolant and flushed the system and then refilled.

Strangely as I re filled the coolant bottle, the liquid did not flow into the system but stayed in the bottle. Squeezing the top and bottom pipe had little effect. So I blew in to the top of the bottle (avoiding blow back) and the liquid level in the bottle dropped a little. I had to repeat this process several times to get enough coolant into the system to get it to come out of the 2 bleed points.

Then I ran the car expecting the level in the bottle to drop so I could re-bleed, but the level didn't drop very much at all. So I got the car up to temperature and the problem overheating is still there. Top and bottom pipes hot, radiator hot, heater hot.

I got the strong impression that the coolant just isn't circulating very much, if at all. So I assume this is either the water pump or the thermostat or a blockage somewhere?

Should I start with replacing the thermostat?

Thanks
You choose either thermostat, fan switch or heater gauge sender unit .
If you think coolant not circulating do thermostat.
To fill system remove a hose from heater matrix it's in engine bay easy access, put funnel in hose and fill through funnel. Make sure you set heater control to hot. Loosen bleed points etc
The tank at side of radiator is an expansion tank and only has a small hole at bottom through to radiator. With engine running the level this expansion tank is not likely to drop because there is no way of any air in the rest of the system to escape and no pressure above the coolant in the expansion tank to push coolant in tank into the system.

Trying to fill system through the tank is not effective and there is most likely air in your cooling system.
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Last edited by jackwhoo; 02-07-2017 at 10:27.
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Old 02-07-2017   #25
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Re: How long does a metal vaned water pump last?

Thanks.
Thermostat ordered.I will refill via the heater pipes as suggested
I was thinking that if I am going to drain the coolant again when changing the thermostat, I may as well replace the fan switch and temp sender at the same time
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Old 02-07-2017   #26
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Re: How long does a metal vaned water pump last?

Quote Originally Posted by jackwhoo View Post

PS add an extra earth wire from battery -ve to body it works wonders .
I will give this a go too. Thanks
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Old 05-07-2017   #27
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Re: How long does a metal vaned water pump last?

Quote Originally Posted by jackwhoo View Post
You choose either thermostat, fan switch or heater gauge sender unit .
If you think coolant not circulating do thermostat.
To fill system remove a hose from heater matrix it's in engine bay easy access, put funnel in hose and fill through funnel. Make sure you set heater control to hot. Loosen bleed points etc...

Trying to fill system through the tank is not effective and there is most likely air in your cooling system.
The hoses to the heater matrix run into a boxed in insulated section with a grill on top. Does that just come apart to expose the hoses?

The Haynes manual shows this for the 903cc, but not additional detail for the 999cc Fire engine (like mine)

Thanks
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Old 05-07-2017   #28
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Re: How long does a metal vaned water pump last?

I had a 999cc years ago and think remember that the pipes were very easy but to get to ( fixed heater valve)
So give it a pull and see how it is attached. You may have to remove battery , but that's easy.
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Old 05-07-2017   #29
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Re: How long does a metal vaned water pump last?

Quote Originally Posted by Torridon1 View Post
The hoses to the heater matrix run into a boxed in insulated section with a grill on top. Does that just come apart to expose the hoses?

The Haynes manual shows this for the 903cc, but not additional detail for the 999cc Fire engine (like mine)

Thanks
Take out battery, the hoses for Heater are on outside of box with grill on top possibly there is some type of synthetic stiff fabric covering the heater valve and heater pipes.

Sorry can't be more certain my panda was recycled over 15 years ago.
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