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Preparing for new Spheres
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xxc   
Wed Apr 10 2019, 11:28pm
Joined: Aug 01 2017
Member No: #3227
Location: flintshire
 Hello All. I would appreciate any useful replies pls.
My 3ltr petrol has 4 year old IFHS spheres that have done +20k miles. And I’m quite sure the spheres are the final piece of the suspension refurb puzzle and return the smoothness.

Is it a valid option to recharge the existing IFHS spheres with a trip to Pleides?

Another idea, as I do prefer OEM, would be to buy used OEM Citroën spheres, and send them off for testing and recharge. Then I’ll have a swing set ready when I do get the existing spheres pressure tested.

But do I need to be concerned about the part numbers?

All Hydropneumatic3 C5 and C6 spheres are effectively the same unit if i understand correctly - apart from different pressures? Is that correct.?

My research so far if it helps anyone
50bar - front & rear corner sphere x4 - Citroën c6 part - 527610
70bar - front regulator sphere x1 - Citroën c6 part - 527627
40bar - rear regulator sphere x2 - Citroën c6 part - 527281

Thanks for all the useful posts.
Invaluable
BR
Dave
joopajaa   
Thu Apr 11 2019, 05:33am
Joined: Sep 06 2017
Member No: #3261
Location: Byroslavia, FIN
 C5 ones will not fit to 2.7/3.0 because AMVAR on the C6 (=large sphere oil hole) if I'm got it right. C5 are all without AMVAR.
gmerry   
Thu Apr 11 2019, 12:10pm

Joined: Dec 11 2009
Member No: #21
Location: Scotland
 Off the top of my head so double check on IFHS Sphere Shop:

Rear corners are 40 bar. Rear stiffness spheres are also 40 bar.
gmerry   
Thu Apr 11 2019, 12:17pm

Joined: Dec 11 2009
Member No: #21
Location: Scotland
 Hi, just checked on Sphere Shop.Yes, rear corners are 40 bar. Personally I would never fit spheres from a 2nd car or unknown source because of risk of contaimination.
xxc   
Thu Apr 11 2019, 08:29pm
Joined: Aug 01 2017
Member No: #3227
Location: flintshire
 Thanks guys
Good point about the contamination Gmerry

I've revised my list

50bar - front corner sphere x2 - Citroën c6 part - 527610
70bar - front regulator sphere x1 - Citroën c6 part - 527627
40bar - rear corner x2 + rear regulator sphere x2 - Citroën c6 part - 527281

I'll find out what a Citroën are charging for OEM spheres these days.
citroenroen1   
Thu Jul 31 2025, 02:56pm
Joined: Apr 18 2024
Member No: #5495
Location: Los Angeles
 Are ALL C6 spheres the same with the exception of the PRESSURES ?

Do C6 spheres have no valves ?
FranekM   
Thu Jul 31 2025, 09:09pm
Joined: Apr 20 2024
Member No: #5499
Location: Krakow
 Hi, AMVAR shouldn't change the sphere type - it is type of hydractive (3 or 3+) what maybe makes the difference in spheres type (but I'm not sure now). IF you check the spheres part numbers mentioned before - they also fits C5's.

@citroenroen1 - As I know yes, they only have different pressures with no changes in structure, but please correct me if I'm wrong.
Actually, there is some valve inside sphere's port, but should be the same in all of them.
Hattershaun   
Fri Aug 01 2025, 04:23am

Joined: Dec 19 2010
Member No: #320
Location: Bedfordshire, UK
citroenroen1 wrote ...

Are ALL C6 spheres the same with the exception of the PRESSURES ?

Do C6 spheres have no valves ?



All V6 engined C6 have the AMVAR system fitted, the variable damping unit is part of the suspension struts, there’s no damper valve fitted in the neck of the sphere. So, all 7 spheres are the same, apart from the gas pressures.

The four cylinder engined C6 has fixed damper valves fitted to each suspension sphere.
 

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