Mark Miller

I think you meant to say Water Pump not crankshaft?

wrench650

Batman vs Shark Which is better?

bskrantz

Yes. I was remembering a really old truck a friend had.

But a mechanical fan mounted on the water pump can certainly add to seal wear, especially if out of balance.

RaptorYFM

A well designed and integrated OEM electric fan is hard to beat, never had an issue with any that I had.

Removing an engine driven fan and replacing it with a parts store electric fan is a different story.
Been there done that, never any better than what was already there.

BadAV

I removed the engine driven clutch fan from my 2002 Avalanche and installed a Flex-A-Lite 282 e-fan. It worked flawlessly for 70k miles and 12 years (until I sold it), with consistent engine temperatures and the added bonus of ice cold a/c at all times versus OEM warm a/c when idling until the fan clutch locked in.

My take is, at least in the past, that OEMs use engine driven fans for vehicles designed for serious towing. They simply work and are less failure prone than e-fans in high stress/demand conditions.

RL1990

When a clutch fan is fully engaged they can pull more CFMs than an electric fan. This is why the SuperDuties use a clutch fan. But even it's electronically controlled and not fully mechanical. The biggest benefit of electric fans is the fast warmup and the ability to have maximum cooling at idle which greatly benefits A/C performance in very hot temperature. In most respects electric fans are superior to clutch fans and I'm sure they're working on incorporating e-fans to the SuperDuties also.

My theory as to why EB can overheat when towing heavy is that Ford doesn't have a separate cooling system for intercooler and turbos. Ford still uses an air to air intercooler instead of water to air. I think when the truck is pushed hard the single cooling system can't handle cooling the engine, turbos, transmission and oil. They should take a page out of the 6.7 PSD book and add a secondary cooling system. Primary for engine cooling and the secondary for a water to air intercooler, turbos, trans cooler and oil cooler.

JaseBosto

Or a radiator that can dissipate more heat. Aftermarket produces thicker radiators that have proven to handle the job better than the stock ones.