Dismantling the purge pump

[hspeck 44]

I tried to open the purge pump to replace the motor, but i only managed to open the top cover.

The bottom cover seemed to be glued shut.

I am not sure if it was originally glued shut or someone did a repair and gkues it shut

Anyone has any idea?

I have tries prying the bottom with knives, pen knives, scrappers etc but it just wouldn't budge.

I only ended up scrapping off the plastic..

 

[Bazza 907 1,063]

I took my old one to a model makers shop and they had a very similar one that was used to power a model aeroplane. Might be worth a try?

[andydclements 754]

Lots of discussions on the Excel forum because it's on later cars and Excels never went Fuel Injection route whilst Esprits went Turbo and FI. It's a fairly common motor size, here in the UK there was a standard motor available from Maplin (no use finding that ref now as they no longer have a website with details on it).

These are glued / sealed shut, because they were not designed to have components in them replaced, the idea was to throw away the whole unit. You will have to do some cutting and prising.

 

edit: I'll be brave a link to the topic as it's a technical article. Hope it's OK mods.

http://www.lotusexcel.net/phpbb/viewtopic.php?f=8&t=4853&hilit=purge

Edited August 13, 2018 by andydclements
add link

[hspeck 44]

1 hour ago, Bazza 907 said:

I took my old one to a model makers shop and they had a very similar one that was used to power a model aeroplane. Might be worth a try?

Are you referring to replacing the motor inside? Or the entire pump?

52 minutes ago, andydclements said:

Lots of discussions on the Excel forum because it's on later cars and Excels never went Fuel Injection route whilst Esprits went Turbo and FI. It's a fairly common motor size, here in the UK there was a standard motor available from Maplin (no use finding that ref now as they no longer have a website with details on it).

These are glued / sealed shut, because they were not designed to have components in them replaced, the idea was to throw away the whole unit. You will have to do some cutting and prising.

 

edit: I'll be brave a link to the topic as it's a technical article. Hope it's OK mods.

http://www.lotusexcel.net/phpbb/viewtopic.php?f=8&t=4853&hilit=purge

So it seems i am right that they are glued shut. I will either need to do some cutting or replace with an alternative then.

I wonder if those 12v vacuum pumps from ebay might work. My only concern is most of them have exposed terminals...

[Bazza 907 1,063]

It was what you have taken the picture of. 

[hspeck 44]

34 minutes ago, Bazza 907 said:

It was what you have taken the picture of. 

Thanks... I will check with them..

[hspeck 44]

So I finally managed to open the bottom of the purge pump.

I had to use a hacksaw to saw away the plastic.

I believe it should be easy to find a replacement motor to fix the pump.

 

[mdw 273]

6 months ago I would have said maplin but that's not a lot of use to you now so ebay or amazon I guess.  

[hspeck 44]

Found an identical motor..

Cost me £2.85... Not bad value..

So it seems i am gonna have a working purge pump after all..

Thanks for the advise guys

 

[Neil Potter 29]

Nice work. Can you share where you found the motor? Mine has been sounding unhealthy for a while now.

[NeilP 20]

There’s a motor manufacturer in Crewkerne who may also be able to help. They used to wind their own coils and assemble gear boxes on site.

 http://www.rotalink.com/our-products/8/dc-motors-optional-gearboxes.html

[hspeck 44]

On ‎11‎/‎09‎/‎2018 at 03:31, Neil Potter said:

Nice work. Can you share where you found the motor? Mine has been sounding unhealthy for a while now.

I found them in a regular electronics component shop.

Unfortunately, I am halfway across the globe from you. I do have a few spares, so if you are willing to pay postage I can send them to you. Btw, I am in Singapore. 

[Neil Potter 29]

Thanks for the kind offer, will try here first though.  I was in Singapore in April - I hope your air con works!  Can't be many Esprits there.

[mdw 273]

Do the timer relay add on  if you can otherwise the pump  will run and run and run until the coolant cools down enough.    And eventually burn itself out like your  original one has.   

[hspeck 44]

On ‎13‎/‎09‎/‎2018 at 16:31, Neil Potter said:

Thanks for the kind offer, will try here first though.  I was in Singapore in April - I hope your air con works!  Can't be many Esprits there.

Yes, luckily my aircon works well ....

21 hours ago, mdw said:

Do the timer relay add on  if you can otherwise the pump  will run and run and run until the coolant cools down enough.    And eventually burn itself out like your  original one has.   

 I have read about that somewhere ... need to find it again

thanks for the reminder