11/08/2026
Here’s a small but important PSA for anyone using our chargecooler kit using the Bosch-style chargecooler pumps (the OEM fit for Mk1 Focus RS, RangeRovers, etc etc, p/n 0392022002)- Check they’re actually flowing properly, as they may be spinning backwards!
While we’ve only ever had 1x fail, we have had two now (non Bosch, as most are now, but a known brand) where the internal wiring polarity was wrong, so if wired up the ‘correct’ way (there is + and - cast in to by the plug), they span backwards, which gives terrible water flow, making the chargecooler very ineffective!
A 2min swap of the wires and it’s fixed, but it’s never something you’d expect to happen, so it’s worth checking.
And anyone who is due to fit one, do this first! Obviously very easy to test, and it’s not worth taking the risk it’s wrong, even if the odds are slim!