New belt driven oil pump

[MadCow]

Not sure if it can be adapted but it seems the new F150 coyotes have ditched the gerotor a pump driven off the belt. Not sure why they didn't use a chain like the 7.3L. Belt longevity aside could this be better than billet pumps for high power builds? Sorry if this has been discussed on the forum already but I didn't see it.

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[SolarFlare]

Coyotes have gone 8s and 7s at this point with stock and aftermarket OPGs. Why change the formula?

 

[Cobra Jet]

I can't see a belt being a better choice... *snap* . . .

 

[ice445]

An oil pump belt is the stuff of nightmares as cars age. All those random specialty belts that provide critical function that people have no idea exist and need to be replaced. The power steering motor uses one already, I can't imagine having another critical failure waiting to happen. I only hope they have some sort of sensor to determine if the pump has stopped instead of relying on the drop in oil pressure.

 

[barron64]

Why use a belt for such a critical function, in an inaccessible location to check or service? Totally stupid engineering. No room for failure as when the belt fails, bye bye engine. Chain drive would be somewhat better but Gear drive is best option. Wait, we already have a gear drive oil pump! Just upgrade to true forged gears, instead of powder forged gears, and you have a bullet proof system.
This is the same engineering/thinking Ford used on the ecoboost 3.5 V6 with a timing chain driven water pump…when it fails, it fills the inside of the engine with coolant. Only way to access/replace is to pull timing cover. What a pita.

 

[Angrey]

There's been quite a bit of interesting developments in the OPG discussion recently.

There is no free lunch.

Hard gears hold up to "normal" wear much longer, but are brittle and prone to shatter.

Soft gears take more abuse, but end up spalling and fouling and leaving metal debris in the filter. They were engineered for short term use and meant for race applications that see tear down and replacement often.

Material type, paired with the issue of tolerances: Tight tolerances mean high pressure and effectiveness, but little room for safety under high rpm or rapid rpm change. Loose tolerances are more forgiving, however they don't provide highly desirable and optimal pressure.

The problems we're seeing are also complicated by the fact that higher RPM use/abuse strains the gerotor application beyond it's original duty.

If a belt fails and you don't catch it quickly, the motor is fugged. But I see that being no different than if the OPG's fail. The differences being that if you keep an eye on oil pressure, a failed belt is more common but no harm to the motor. Whereas even if you catch the OPG failure, there's a high probably parts and pieces are gonna require a whole motor tear down.

Programming in safety features that kill the motor if the oil pressure drops rapidly would seem to be beneficial, not just for oil pump failure, but other failures we've seen, the oil temp sensor backing out, filters backing off, etc.

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