Inside Look | Gen IV Coyote V8 Engine | Livernois Motorsports

SID297

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Inside Look | Gen IV Coyote V8 Engine | Livernois Motorsports

Livernois_Aug_23_024.jpg

There are few things we find more interesting than tearing down a new engine and seeing what changes/upgrades the engineers have made. So when we heard Livernois Motorsports had a pile of F-150 Gen IV Coyote V8s they were disassembling and rebuilding, it was an obvious choice to stop by and check everything out. We left educated and excited to see what’s to come.

Our visit took place in August of 2023, and the Gen IV Coyote had yet to hit the streets in the S650 Mustang. However, a much different version of the Gen IV found its way under the hood of the updated 2023 F-150. The major changes from the very popular Gen III Coyote include; a belt-drive variable vane oil pump, cylinder deactivation, and significantly revised cylinder heads. In the following video we take you along as we explore these changes across several engines in various states of assembly/disassembly. Check it out:





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This is the wet-belt driven variable flow oil pump Ford is now using on the F-150 Coyote engines. The Mustang Gen IV retains the traditional crank driven geroter style pump.


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That's one complicated cam cap.


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These oil feed tubes run through the head and deliver the hydraulic pressure needed to activate the cylinder deactivation system.


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This is a better look at the control solenoids for the deactivation system and the mount for the high-pressure fuel pump.


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This oil passage (top-rear of the deck surface) supplies the additional oil needed to operate the cylinder deactivation system. The Mustang Coyote retains this feature, which should provide additional oiling to the valvetrain.


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A closer look at the new oil galley in the Gen IV block.


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The block also now features some additional holes to reduce both weight and windage.


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The bottom-end is largely unchanged from the Gen III Coyote.


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One of the best features of the Gen IV truck Coyote is the addition of a separate cam carrier plate to remove the cam journals from the head.
 

Coyobra

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Cool write up! Sad to see all the stuff they are having to do to meet the arbitrary mpg standards, looks hopelessly overcomplicated.
 

Weather Man

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Not a fan of belt driven oil pump unless there is a sensor to auto-shutdown the engine. Be an expensive service to do on an older truck when it his 60K+ miles.
 

SID297

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Good video. Maybe I missed it, but why the new belt driven pump on the trucks? And, why not on the Mustangs?

There's a couple reasons. The first is fuel economy. The variable volume pump can run at lower pressures under light conditions, then can increase flow/pressure when conditions dictate it's needed (under heavy load, or when the cylinder deactivation requires more oil). That increases efficiency. The 7.3L has a similar setup, but it's pump is driven by a chain. That increases longevity. The belt on the F-150 Coyote helps reduce NVH and shock load on the pump/crank, when compared to a chain.

IMO, the added complexity isn't worth the gains in fuel economy.
 

gimmie11s

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There's a couple reasons. The first is fuel economy. The variable volume pump can run at lower pressures under light conditions, then can increase flow/pressure when conditions dictate it's needed (under heavy load, or when the cylinder deactivation requires more oil). That increases efficiency. The 7.3L has a similar setup, but it's pump is driven by a chain. That increases longevity. The belt on the F-150 Coyote helps reduce NVH and shock load on the pump/crank, when compared to a chain.

IMO, the added complexity isn't worth the gains in fuel economy.

Totally agree on the belt system not being necessary as Gen 3 also has a variable oil pump that can drop oil psi damn near into the single digits at idle via electric bypass solenoid, but instantly jump to 30+ with touching the throttle.

I do like the closed deck block on Gen 4. Gen 3 does not have that.
 

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