Citroen C5 Aircross Radiator: Specs, Fitment & Common Faults
On the C5 Aircross, a genuinely specific detail before DIY thermostat housing work: real torque figures that prevent over-tightening from causing the exact leak you're trying to fix.
Illustration for editorial purposes
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Citroen C5 Aircross Radiator: OEM Part Number
| Manual gearbox, all engines | Standard radiator with no transmission cooling circuit |
|---|---|
| Automatic (EAT6/EAT8), all engines | Genuinely uses a separate automatic transmission oil cooler, connected via pipes into the radiator's coolant circuit — confirmed shared across the wider PSA Group range (Peugeot and Citroen models sharing one common part number), not a tank built into the radiator itself |
A Genuinely Specific Detail Worth Knowing Before DIY Thermostat Housing Work — Citroen C5 Aircross Radiator
If you're replacing the thermostat housing yourself, it's genuinely worth knowing a specific detail that catches many DIYers out: on several engines in this range, the housing is secured directly onto the cylinder head with a thin bead of RTV sealant rather than a conventional gasket, using a relatively large number of bolts (commonly 8) tightened to a comparatively light torque figure — documented at around 8Nm on some engines — rather than fewer bolts at high clamping force. Over-tightening these bolts, assuming a higher torque figure "seems safer," can actually crack the housing or distort its sealing surface, causing exactly the leak you were trying to fix. Confirming the genuine torque specification and sealing method for your specific engine before starting is worth doing rather than guessing.
It's also worth knowing that a genuine air lock trapped in the system after any coolant work is a common cause of the same overheating symptoms as a faulty thermostat or pump — always follow the correct bleeding procedure for your specific engine after any repair in this area.
Citroen C5 Aircross Radiator: The Part That Keeps Everything Else From Cooking
There's nothing exciting about this component, yet on the Citroen C5 Aircross, most catastrophic engine failures that aren't simply down to wear trace back to a cooling problem someone ignored too long. Catching it early is cheap; catching it late usually isn't.
Citroen C5 Aircross Radiator: What It Does
The Citroen C5 Aircross radiator's core job is moving heat out of the engine coolant and into the passing air, holding engine temperature within safe limits. Automatic versions frequently add a second internal circuit for transmission fluid cooling, which is exactly why the correct part number carries extra weight on this component.
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Citroen C5 Aircross Radiator: Faults, DIY Difficulty & Aftermarket Advice
These are the same regardless of make or model — see our full Radiator Guide for the three common failure modes, confirming fitment against your VIN, and OEM vs aftermarket guidance.
More Citroen Radiator
The same part, covered across other Citroen models.