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Tech & Engines

First Look at What's Really Inside the 2015 Mustang 5.0L Engine!

November 03, 2014 by Chad Houghton


We have all been eagerly awaiting the release of the 2015.  Now that they are starting to show up in the hands of the public, finally we can reveal the secrets inside the heart of beast.  I'm going to keep this article point form and to the facts.  I'm not going to bore you with a bunch of useless blabbering when you all you really want is the Meat and Potatoes!

 First, let's start with the block:  The water cooling passages are redesigned, hopefully solving the issue in the older block.  The issue being, the hot spot between #6 and #7 cylinder.  Though Ford never had a problem with stock configurations, when modified, problems occurred.  The squirters are back in the block and the oil feed in the block has been improved as well.

 Rotating Assembly: The crank has been rebalanced with a tighter tolerance, and now has stronger rods. Similar to the Boss and should be as strong. 

Cylinder Heads Assembly: The heads are much like the Boss without the CNC porting. From what I can gather, they incorporated the CNC porting directly into the casting along with installing the bigger valves like the Boss heads. The cams are a new profile, both, intake and exhaust.  Some thought they would be the same as the Boss, but this is not the case with the 2015 engine having a different firing order.  The valve springs are the same as the Boss valve springs Even the VCT's are different with the intake cams having a valve system inside that mid locks through the RPM range. 

Chain and Timing assembly:  The secondary chains are the same as the old engine, but the primary chain has changed. The links are smaller and the chain itself is narrow.  The crank sprocket has changed and when looking at the old and new one side by side they cannot be interchanged.  The old one has a wider chain and a completely different pitch on the teeth.  The chain tensioners are now the same as the Boss tensioners but made out of aluminum.  

The valve covers have 5 less bolts to hold them down.  This may not sound like a significant change but if your running boost and pressurize your oil system, the cam covers have a greater opportunity to lift sending oil on to the track/road and may cause you to smoke the wall.

Intake Assembly The intake now has CMCV's like they did on the old 4.6L three valve engines. They work under the same principles, only the new design is not a butterfly but a single flap, that folds straight down and out of the way of the runner. The door is activated at start up, to help control low speed idle and low speed torque.  At 4000rpm the flaps are deactivated and fold out of the way.  The good thing is that any intake from the previous Coyote engine will bolt on no problem.

The exhaust is still shorty style headers.  On the drivers side there is now a small resonator/catalytic converter built into the header to help with emissions.

The engine is NOT direct injected!

 Last, but not least, the most important question.  Is the oil pump gear the same as the previous models?  The answer is yes!

If you have any questions feel free to ask below in the comment section.