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Discussion Starter #1
Hello.
I'm going to replace the coolant fluid on my D2 PSA powered engine.
The owner's manual doesn't state the type and only reports the quantity (10L). Looking at the colour is seems a "green/blue" type.

Does someone know the OEM product code or any 100% compatible antifreeze?

From my reasearches Volvo now supplies the following:
  • Reference 31439720 1L concentrate packaging
  • Reference 31439721 4L concentrate packaging

I remember having read that Glysantin (Basf) prodouces it for Volvo and, in some forums, people suggest Glysantin G48 for Volvo engines.
If you look at official Glysantin site, they instead suggest the G64 (with Volvo Cars homologation TR-31854114-002); instead the G48 is now suggested for Volvo Trucks < 2005.
The G64 appears to be "green", while the G48 seems to be a "green/blu" type.

On a russian forum a guy with a Volvo had my same concerns and wrote about his experience. He was looking for Volvo coolant (1L - 9437650 ; 4L - 9437651) but was able to buy only the new version (1L - 31439720 ; 4L - 31439721). On the new packaging both old and new references are present.
The new 31439720/31439721 version is "green", while the old 9437650/9437651 is "green/blue".

Any tips? Thanks.
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unsure of tech spec, but my D2 ford engined V40 has light green coolant. i think it might be mixed so it doesnt destroy the plastics used for connectors and thermostat housings?
 

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Discussion Starter #3
My D2 PSA engine (1.6) has the green/blue coolant and this was used by Volvo until they introduced the VEA engines and opted for the light green version. I think they're both compatible even if I suspect Volvo has performed this choice for economical reasons. Keeping only one version is cheaper.
I've also checked with indipended workshops and their software used to check parts and fluids for the V40, suggest to use the green/blue on PSA engines.
 
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