Has anyone ever had a 2B5/2B7 carb rebuilt?

Ross Slaughter · Jan 16th, 2021, 11:26

As I said has anyone had their Pierburg successfully rebuilt? 🤗

Forrest · Jan 17th, 2021, 21:52

Not the 2B5 for a Volvo as mine are fuel injected but I did successfully rebuild a 2E2 for my Volkswagen Scirocco which I ended up doing myself.

When I first contemplated doing so it was a daunting task as Pierburgs seem quite complicated. However, the exercise was both successful and a really good learning experience which will help me understand any future faults as they develop.

Rebuild kits and parts seem to be readily available. I bought a secondhand carb and stripped that down first. Not only is it a good dry/practice run but it also makes a good source of spare parts for the rebuild.

Jimsiss · Jan 20th, 2021, 14:14

Carbs are relatively easy to rebuild, it’s just tweaking them after to make the car run correctly that’s a bit trickier.

rwdkev · Jan 28th, 2021, 13:29

Did you manage to get a diaphragm then?

https://www.volvoforums.org.uk/showthread.php?t=312592

Forrest · Jan 29th, 2021, 19:20

If not, this might help and not a bad price either for a genuine NOS Pierburg unit if it’s the right one.

https://www.ebay.co.uk/itm/Pierburg-...o/114520620083

What I discovered the hard way doing my VW was that there are a lot of very similar looking parts in Pierburgs which are actually subtly different between models. The choke pulldown units vary in length.

Also, that small brass reducer is quite important too and the new non-OEM copies tend not to include it. Without it the choke will adjust too quickly.

Ross Slaughter · Jan 29th, 2021, 19:38

Quote:

Originally Posted by rwdkev

Did you manage to get a diaphragm then?

https://www.volvoforums.org.uk/showthread.php?t=312592

No as I can’t for the life of me work out which is the right part for the 2B5.

Ross Slaughter · Jan 29th, 2021, 19:47

Quote:

Originally Posted by Forrest

If not, this might help and not a bad price either for a genuine NOS Pierburg unit if it’s the right one.

https://www.ebay.co.uk/itm/Pierburg-...o/114520620083

What I discovered the hard way doing my VW was that there are a lot of very similar looking parts in Pierburgs which are actually subtly different between models. The choke pulldown units vary in length.

Also, that small brass reducer is quite important too and the new non-OEM copies tend not to include it. Without it the choke will adjust too quickly.

This looks good and I can now see where it goes on the carb body

Jan 16th, 2021, 11:26	#1
Ross Slaughter No longer Volvoless Last Online: May 22nd, 2022 09:00 Join Date: Nov 2015 Location: Wendover	Has anyone ever had a 2B5/2B7 carb rebuilt? As I said has anyone had their Pierburg successfully rebuilt? 🤗

Jan 20th, 2021, 14:14	#3
Jimsiss Senior Member Last Online: Apr 23rd, 2024 07:22 Join Date: Jul 2012 Location: Northwich	Carbs are relatively easy to rebuild, it’s just tweaking them after to make the car run correctly that’s a bit trickier. __________________ 940 B230FT

Jan 17th, 2021, 21:52	#2
Forrest VOC Member Last Online: Today 19:03 Join Date: Feb 2008 Location: Gloucester	Not the 2B5 for a Volvo as mine are fuel injected but I did successfully rebuild a 2E2 for my Volkswagen Scirocco which I ended up doing myself. When I first contemplated doing so it was a daunting task as Pierburgs seem quite complicated. However, the exercise was both successful and a really good learning experience which will help me understand any future faults as they develop. Rebuild kits and parts seem to be readily available. I bought a secondhand carb and stripped that down first. Not only is it a good dry/practice run but it also makes a good source of spare parts for the rebuild.

Jan 28th, 2021, 13:29	#4
rwdkev VOC member Last Online: Mar 27th, 2024 18:04 Join Date: Apr 2013 Location: Dudley	Did you manage to get a diaphragm then? https://www.volvoforums.org.uk/showthread.php?t=312592

Jan 29th, 2021, 19:20	#5
Forrest VOC Member Last Online: Today 19:03 Join Date: Feb 2008 Location: Gloucester	If not, this might help and not a bad price either for a genuine NOS Pierburg unit if it’s the right one. https://www.ebay.co.uk/itm/Pierburg-...o/114520620083 What I discovered the hard way doing my VW was that there are a lot of very similar looking parts in Pierburgs which are actually subtly different between models. The choke pulldown units vary in length. Also, that small brass reducer is quite important too and the new non-OEM copies tend not to include it. Without it the choke will adjust too quickly.

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