Run On Pump Qu

[ee0u30eb]

Quick question with regards to diagnosing and fixing the run-on pump.

 

1. Should the pump be on from starting the car? Or even from turning on the electrics? or does the pump only start when at a set temperature?

 

2. How accessible is the pump for the average joe bloggs? I know where it is but haven't put any thought to how easy it would be to replace/fix.

 

Many thanks

[ee0u30eb]

Sorry... 52 reg, MKII Ghia TDi

[Mirez]

The pump will come on approximately 30 seconds after the ignition, regardless of engine start or not. It operates at all temperatures and stays on the entire time the ignition is on, a delay relay holds the pump on for around 3 minutes after the ignition is switched to off. Thats the only conditions for the aux pump unless you live In a cold climate regions (not uk) with pre-heat function in which case it come on with that as well.

 

Changing it is easy but fiddly, remove the bulk head cover (3 bolts) and it'll be a lot easier, its held in place by two rubber rings - disconnect the in and outlets and then slide it out of the rings - in theory its a 2 minute job, in reality takes about 30 mins of fiddling and scratched hands! There will be some coolent loss so be ready, but its one of the highest points in the system so you shouldn't lose much - you could bench clamp the pipes to stop leaking but given the limited space its not ideal to add anything else into the area!

[ee0u30eb]

Thank you!

 

I told my mechanic that I thought the run on pump was knackered because I realised never hear it, and he told me that it doesn't always run, and will only run at a set temp! I didn't think he was correct.... I'm not taking it there again thats for sure.

[chrispb123456]

The pump will come on approximately 30 seconds after the ignition, regardless of engine start or not. It operates at all temperatures and stays on the entire time the ignition is on, a delay relay holds the pump on for around 3 minutes after the ignition is switched to off. Thats the only conditions for the aux pump unless you live In a cold climate regions (not uk) with pre-heat function in which case it come on with that as well.

 

Changing it is easy but fiddly, remove the bulk head cover (3 bolts) and it'll be a lot easier, its held in place by two rubber rings - disconnect the in and outlets and then slide it out of the rings - in theory its a 2 minute job, in reality takes about 30 mins of fiddling and scratched hands! There will be some coolent loss so be ready, but its one of the highest points in the system so you shouldn't lose much - you could bench clamp the pipes to stop leaking but given the limited space its not ideal to add anything else into the area!

 

 

Thank you!

 

I told my mechanic that I thought the run on pump was knackered because I realised never hear it, and he told me that it doesn't always run, and will only run at a set temp! I didn't think he was correct.... I'm not taking it there again thats for sure.

Hi there

Mirez is spot on what he has told you, all I would add is change the hose clips to the jubilee type when replacing/repairing your pump :46:

[gregers]

yep gota agree with chrispb here,there a right P.I.A to get back on unless you have the correct tool,oh make sure you put the jubilees on the right way aswell so the nut is facing you,unlike SOME BLOODY NUMPTY I KNOW:blush: WHO DIDNT:rolleyes:

there are detailed instructions on a repair to the pump itself if you fancy doing it yourself in the faqs.

[Shaun70]

yep gota agree with chrispb here,there a right P.I.A to get back on unless you have the correct tool,oh make sure you put the jubilees on the right way aswell so the nut is facing you,unlike SOME BLOODY NUMPTY I KNOW:blush: WHO DIDNT:rolleyes:

there are detailed instructions on a repair to the pump itself if you fancy doing it yourself in the faqs.

 

I repaired mine by simply replacing the carbon brushes inside the pump, they wear out after i think x amount of miles!

 

They can be replaced but you need to source the brushes from somewhere like ebay and file them to the correct size to fit. it isnt to difficult a job and if you decide to do it i will try to give you some more tips.

[Mirez]

yep gota agree with chrispb here,there a right P.I.A to get back on unless you have the correct tool,oh make sure you put the jubilees on the right way aswell so the nut is facing you,unlike SOME BLOODY NUMPTY I KNOW:blush: WHO DIDNT:rolleyes:

there are detailed instructions on a repair to the pump itself if you fancy doing it yourself in the faqs.

 

I repaired mine by simply replacing the carbon brushes inside the pump, they wear out after i think x amount of miles!

 

They can be replaced but you need to source the brushes from somewhere like ebay and file them to the correct size to fit. it isnt to difficult a job and if you decide to do it i will try to give you some more tips.

 

 

and if anyone wants a spare pump to work on, I have my old one you can have for the price of postage :46:

[tbag]

Hi,mirez do you know where the delay relay is and which one do i change. only mine still works when i switch on but does not carry on when i switch off.engine running or not. cheers t bag. sorry to chip in folks.

[davewill]

How would you know if the Run On pump had stopped working????

 

Sorry if a daft question but just interested in knowing what to look for

 

My 2006 Mkll tdi has now done 88,000 so i am expecting something to fail soon, if i know what to expect re the run on pump, then i can be ready for it

 

Thanks

[chrispb123456]

How would you know if the Run On pump had stopped working????

 

Sorry if a daft question but just interested in knowing what to look for

 

My 2006 Mkll tdi has now done 88,000 so i am expecting something to fail soon, if i know what to expect re the run on pump, then i can be ready for it

 

Thanks

Hi there

If it's working you will hear a humming noise behind the dash when sitting in car.

The pump is located on the bulkhead to the rear of the fuel filter so you will hear the humming also from under the bonnet and if you put your hand on the pump you will feel it vibrate.

[nicebutdim]

Do all Galaxys have this pump? Mines a mk1 2000 tdi. I've never heard a humming before though.

[chrispb123456]

Do all Galaxys have this pump? Mines a mk1 2000 tdi. I've never heard a humming before though.

Hi there

Mk 2 TDI's have the pump attached to the bulkhead behind the fuel filter, requires removal of the bulkhead extension plate (scuttle plate) to see clearly.

The TIS manual shows it being next to the booster heater, as you have a Mk 1 your's may be there.

[davewill]

How would you know if the Run On pump had stopped working????

 

Sorry if a daft question but just interested in knowing what to look for

 

My 2006 Mkll tdi has now done 88,000 so i am expecting something to fail soon, if i know what to expect re the run on pump, then i can be ready for it

 

Thanks

Hi there

If it's working you will hear a humming noise behind the dash when sitting in car.

The pump is located on the bulkhead to the rear of the fuel filter so you will hear the humming also from under the bonnet and if you put your hand on the pump you will feel it vibrate.

 

Good news (i hope)

 

I can hear a humming noise so looks like it is working

 

BUT ... What happens if it stops working??

 

Does the car overheat or is there another fault shown???

[Mirez]

No faults are shown and it won't overheat if the primary water pumps working. Its main purpose it for the auxillary and rear heater. However its important that it is working as it has got 3 uses:

 

1) To assist / backup the main water pump

2) As the name implies to "Run-On" after switch off, preventing hot spots from forming within then engine

3) Its the only way water will properly circulate around the rear heater, the booster heater will die quite quickly if the pumps not working.

[davewill]

No faults are shown and it won't overheat if the primary water pumps working. Its main purpose it for the auxillary and rear heater. However its important that it is working as it has got 3 uses:

 

1) To assist / backup the main water pump

2) As the name implies to "Run-On" after switch off, preventing hot spots from forming within then engine

3) Its the only way water will properly circulate around the rear heater, the booster heater will die quite quickly if the pumps not working.

 

Thanks Mirez

 

I am now Wiser :) :D

[Munter]

Does anyone have a definitive Bosch part number for this pump? I did see in the other thread a part number but that was posted in 2006 so just wanted to check if it is still current! (Mk2 53 Diesel)

[sotal]

and if anyone wants a spare pump to work on, I have my old one you can have for the price of postage :)

 

 

Hi Mirez, do you still have the spare pump? I'll happily pay for postage and packaging for it - I've just repaired my pump and made a bit of a hash of it. It works but I wouldn't expect it to last long so it would be great (now that I know how to do it) to refurb another ready for when my taped together one fails!

 

If you still have it please let me know how much postage would be and I could sort it out via paypal - many thanks!

[George106]

Does anyone have a definitive Bosch part number for this pump? I did see in the other thread a part number but that was posted in 2006 so just wanted to check if it is still current! (Mk2 53 Diesel)

 

Currently I have new one in the box and the Bosch Part Number is 0 392 020 073. VW / Audi 3D0 965 561 D resp. 1J0 965 561 A.

 

George

[Mirez]

Sotal, are you uk mainland? I'll price it tomorrow but can't see it being more then a few quid.

[sotal]

Sotal, are you uk mainland? I'll price it tomorrow but can't see it being more then a few quid.

 

Yes mate, Staffordshire - just let me know how much and your paypal address and I'll sort it out,

 

Cheers

[sotal]

Hi Mirez,

 

Did you manage to get a price for postage??

 

Cheers

[Mirez]

Hi Mirez,

 

Did you manage to get a price for postage??

 

Cheers

 

No, been a bit manic - using the RM website it should be

[sotal]

No problem, send us your paypal account and I'll send a fiver across to you if that's OK with you?

 

Cheers

[Ginettamad]

Pretty sure my run on pump does not carry on after switch off but maybe its just very quiet? I do here the water rush start when I switch on however so think its running ok.

Maybe later cars had a different control system along with the different Aux Heater? Maybe it would run on if my Aux heater was running at switch off but its sat on my workshop bench after a recon!

H