Citroen C5 - Foam injection worries

Honest John Back Room » Technical matters
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Thu 16 Mar 2006 20:01
Citroen C5 - Foam injection worries - happytorque
I have a 2003 Citroen C5. I have owned it from new and im thinking of keeping it for several years.
When it was brand new i complained to the dealer about lots of clonks, bumps and thuds coming from the rear of the car when driving over small bumps.
They attempted to fix this problem by injecting "expanding foam" into the the hollow box sections which run either side of the car under the floor of the boot.
Seemingly this was a Citroen approved fix at the time. The can of foam even has a citroen part number.
What could i expect the long term effects of this foam to be? Im thinking particularly about drainage or ventilation of the hollow sections being blocked up. Is it likely to cause problems?
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Thu 16 Mar 2006 20:17
Citroen C5 - Foam injection worries - LeePower
The C5 like all PSA Peugeot / Citroen vehicles produced since the mid 1980s is galvanised.

It WONT rust unless the paintwork gets damaged & you don't repair it.

The only times I ever see rusty Peugeots & Citroens its always been down to poor accident repairs or owners leaving stonechips to rust.

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Fri 17 Mar 2006 07:11
Citroen C5 - Foam injection worries - Collos25
There was a permanent fix for this problem after the stop gap foam fiasco,I would take it back to Citroen ask them to do if it is still of some concern.
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Fri 17 Mar 2006 19:08
Citroen C5 - Foam injection worries - happytorque
Ive had the new shperes etc fitted and its just about fixed the clunks and bangs. What im more concerned about is what the long term effect of plugging the hollow section might be. Cheers, Trev
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Sun 19 Mar 2006 15:05
Citroen C5 - Foam injection worries - Ben79
I had new spheres fitted and it cut most of the rattles from the rear. Not especially cheap, and I am nowhere near the 5 years or 100k mile "no maintenance" claim by Citroen.

Now I just have a squeak on the rear suspension, not sure where to oil though!
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