Ford 3.7L V6 Duratec: Everything You Need To Know

Ford already dethroned the larger Duratec 3.7 engine with a smaller and sturdy engine under the name of the 3.5 Ti-VTX V6 in 2015. However, due to the impact of these engines, Ford continued to use them for some vehicles.

It is more widely known for being the mainstay engine – before the 3.5, to the Mustang and F-150 vehicles. 

Where does this engine place, and what legacy does it have? 

Join me as we go with these details. 

What are Ford 3.7 Duratec Engines? 

The Ford 3.7 Liter, also known as the Duratec 37 engine, is the 3.7 Liter version of the Cyclone line of machines intended to bring buffs and power to heavier or premium vehicles.

A little background on the cyclone engines. The latest DOHC family of gasoline V6 engines was introduced in 2006 by the Ford Motor Company. 

The Ford Cyclone engine has come a long way before its arrival in 2007 for the Ford Edge and other Lincoln-badged luxury variant vehicles. Before the Cyclone circulated as the new namesake and design for cars, it underwent many changes.

Ford Essex engine in 1981, Ford Vulcan engine in 1985, and the original and accurate profile of Duratec engine in 1993. 

 Though Ford continues to use the Duratec badge, the Cyclone does not share the features, components, or design with the previous Duratec engine and new. 

Back to the Duratec 37, the engine has an added displacement due to increased cylinder bore diameter. However, Duratec 37 has the same piston stroke as the 3.5 Duratec; the dimensions are 95.5 mm and 86.7 mm, respectively. 

Ford sells this engine as the CSG-637 for industrial use, replacing the 4.2 Essex engine and manufactured under the license of Engine Distributors Inc. 

In addition to that, a new version of the Ford 3.7 Duratec engine was unveiled a few days before the 2009 Los Angeles International Auto Show for the 2011 Mustang, making it the first Duratec engine since the Lincoln LS to be used in a production rear-wheel-drive car. 

This version of the Duratec 37 features Twin Independent Variable Cam Timing (Ti-VCT), delivers 31 mpg in the Mustang, and is the first production engine to deliver in excess of 300 HP. 

Engine Specifications and Design:

  • Production Run: 2007 – Present
  • Cylinder Head Material: Aluminum
  • Cylinder Block Material: Aluminum
  • Configuration: V6 
  • Bore: 95.5 mm
  • Stroke: 86.7 mm
  • Valvetrain: DOHC four valves per cylinder
  • Displacement: 3.7 L (3726 cc)
  • Compression Ratio: 10.5
  • Weight: 450 lbs. (Dry)
  • Maximum HP: 305 HP at 6,250 – 6,500 RPM
  • Maximum Torque: 280 lb-ft at 4,000 – 4,250 RPM

Engine Design:

Let’s take a closer look inside the engine!

Cylinder Block 

The Ford Duratec 37 engine has a cast aluminum cylinder block featuring modern features with the standard ones, the one they used in prior engines. The engine has a structural rear sump cast-aluminum oil pan and a removable rear main seal cover plate.

Courtesy of the Ford, they used the same piston stroke; maybe they want consistency and branding. 

The cylinders have an open-deck design with cast-in liners and are fully floating mounted at the top of the engine block. The engine is also equipped with a forged crankshaft made from alloy steel, six-bolt billet steel main caps, and cast-in oil squirters.

These squirters matter, too, because they regulate the temperature of the pistons. 

If the temperature goes beyond the optimal levels, the internal components may suffer from heightened friction. Thus, decreasing the performance and potential abilities of the engine. 

Cylinder Heads

The Ford Duratec 37 engine has aluminum cylinder heads. The heads have four valves per cylinder and two chain-driven camshafts placed at the top. A primary timing chain is the main driver of the system – it drives the water pump and intake camshaft.

Meanwhile, the intake camshaft for each cylinder bank provides rotation to the exhaust camshaft through a secondary small single-roller chain. 

Engine models prior to 2011 came with variable cam timing (iVCT) in the intake camshafts only. However, succeeding models in 2011 has the twin-independent variable cam timing on both the intake and exhaust camshafts.

The valve train uses Ford’s Direct Actuating Mechanical Buckets (DAMB), in which the contact surface is polished. 

The valve sizes are 36.83 mm for the intake and 20.99 mm for the exhaust; both valves have 5.5 mm stems. The intake valve lift and exhaust valve lift are approximately 9.9 mm and 9.1 mm, respectively.

The Ford 37 Duratec uses Ford’s Front-end accessory drive (FEAD), which has no idlers or tensioners to siphon power from the engine. 

Intake and Exhaust Manifold

Mounted on top, the engine has a two-piece intake manifold with the fuel injectors placed in the lower intake piece. Both of these upper and lower intake manifolds are made from plastic, while the exhaust manifold is made from cast iron.

The Ford 3.7 engine in the Mustang and F250 have manifolds that have the shape of the oval exhaust ports to the collector. 

Applications of the Ford 3.7 V6 Duratec Engine: 

  • 2008 – 2009 Mazda CX-9 
  • 2009 – 2013 Mazda 6
  • 2009 – 2012 Lincoln MKS
  • 2010 – 2012 Lincoln MKT
  • 2011 – 2013 Ford F150
  • 2011 – 2014 Ford Mustang
  • 2011 – 2015 Lincoln MKX
  • 2011 – 2014 Ford Edge Sport
  • 2013 – 2016 Lincoln MKZ
  • 2013 – 2016 Lincoln MKS
  • 2013 – 2018 Lincoln MKT
  • 2013 – Present Radical RXC V6
  • 2012 – 2015 Ginetta G60
  • 2015 – 2019 Ford Transit
  • 2015 – 2017 Ford Mustang
  • 2016 AM General MV-1
  • 2016 – 2018 Lincoln MKX
  • 2017 – 2020 Lincoln Continental 
  • 2015 – Present CSG-637 
  • 2013 – 2019 Ford Police Interceptor Utility
  • 2013 – 2019 Ford Police Interceptor Sedan 

Engine Tuning, Modifications, and Upgrades

A low-key British manufacturer named Radical Sportscars installed their in-house Radical RXC V6 models (track-only race cars and street-legal road cars) with Ford 3.7 Duratec.

This machine produces 350 hp at 6,250 rpm and 320 lb-ft of torque at 4,250 pm. 

However, another British company, the Ginetta Cars, used a 3.7 Ti-VCT engine for the 2012-2015 Ginetta G60. The result is that the engine delivered 310 hp at 6,250 rpm and 288 lb-ft of torque at 4,500 pm.

Problems Surrounding Ford 3.7 V6 Duratec Engines:

I know that you already know this, that there are no perfect engines. The age, mileage, the amount of wear and tear of the components account for the overall deterioration and declining engine performance of the engine in the long term. 

You cannot stop the flow of things, though, as they have to be replaced, especially if they are standard maintenance items that need periodical changes to serve their functions efficiently.

Listed below are some issues that your Ford 3.7 V6 Duratec might encounter: 

1. Water Pump Issues

The first concern regarding the Duratec 37 engine is its traverse orientation. The water pumps placed on the 3.5L V6, 3.5 EcoBoost, and the 3.7 V6 engines have the tendency to fail and may potentially break the engine when that happens.

It is also hard to reach these water pumps because they are internally mounted and driven by the timing chain. 

You have to go through a lot of components before you can locate the pumps. Anyway, as a result of a failed water pump, minuscule amounts of antifreeze go into the crankcase.

When mixed together with the engine oil, this concoction can potentially damage the connecting rod bearings and the head gaskets. 

Unfortunately, there are no early warning signs regarding this issue as they occur out of nowhere; without warning. In addition, the repair costs and other charges are pretty expensive for this issue, so you might want to save up a little if ever it comes knocking on your door. 

You have two options for this kind of issue, either you disassemble or remove the pump, or you need to replace the engine. A lawsuit was filed against Ford with this issue.

The longitudinally mounted engine variants of the 3.3, 3.5, 3.5 EcoBoost, and the 3.7 V6 now use an external water pump to eliminate the hassle on water pump access. 

Affected Vehicles on this issue: 

  • 2008 – 2009 Mercury Sable 
  • 2008 – 2009 Taurus X 
  • 2007 – 2018 Ford Edge
  • 2009 – 2019 Ford Flex
  • 2010 – 2012 Ford Fusion Sport
  • 2007 – 2016 Lincoln MKZ
  • 2009 – 2013 Mazda 6 3.7 V6
  • 2007 – 2015 Mazda CX-9
  • 2008 – 2019 Ford Taurus
  • 2017 – 2020 Lincoln Continental 
  • 2007 – 2018 Lincoln MKX
  • 2010 – 2019 Lincoln MKT
  • 2011 – 2019 Ford Explorer
  • 2013 – 2019 Ford Police Interceptor Sedan
  • 2013 – 2019 Ford Police Interceptor Utility
  • 2009 – 2016 Lincoln MKS

2. Water Pump Bearing Failure

In relation to the water pumps, the water pump bearings are also vulnerable to failing. In recent Duratec versions, the chain-driven pump at the front also works as an alternate of an intermediate timing chain sprocket, turning the vector of applying force by 120-degrees. 

When these bearings fail, it causes the movement of the timing center leading to some serious problems inside the cylinders and valve train. Further, the coolant leakage that should weep out the front of the timing cover ends up mixing with the engine oil and forms a milky oil in coolant emulsion inside. 

3. Cam Torque Actuated Phasers Issues

If the water pump issue plagued mostly the earlier i-VCT engines, however, the cam torque actuated phasers affect the tail end of these engines. It’s like part 1 and 2 episodes. Okay, then to proceed, the Dual Variable Cam Timing technology imposed by Ford is pretty complex at this time, involving many parts. 

You what it is, if you have many moving parts, you have a lot of contacts and a lot of things going on at the same time. 

It is a good addition, though to an already established engine, but there are issues regarding these guys. These components rotate each camshaft relative to the timing. These cam torque phasers, when they fail, can cause other problems if not addressed quickly and properly.

On top of that, it is also expensive to fix this kind of issue. 

Summary

After going through the overall rundown of the engine, all I can say is that this engine has already established itself as one of the longest-running engines. The name that Ford introduced put people in a different perspective in the engine.

It is best for traversing and city driving with a little bit of aggressiveness spice. That’s the flavor that these engines serve. 

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