Re: IC Pump Testing
That's weird. I can find reports all over the Ford forums about failed Cobra/Lightning pumps, but not one thread about a failed Bosch #10 on any XF or M/B forum.
The OEM pump flows 4.X GPM and the Johnson Pump flows 7.X GPM, thats almost double. There is a point that the coolant can flow so fast through the heat exchanger that it will not get the full cooling effect. I may be wrong, but when the German engineers designed the I/C cooling system on these cars you would think the 4.X GPM was what was required to cool the system at it's best. I'd say play it safe and stick with the Bosch that was designed for our system.