3.7L V6 Duratec/Ti-VCT Engine - In-Depth Look at Design and Reliability (2024)

3.7L V6 Duratec/Ti-VCT Engine - In-Depth Look at Design and Reliability (1)

The 3.7-liter version out of Ford's Cyclone V6 engine family appeared in 2007. This engine, known as Ford Duratec 37, also was being produced by Mazda and firstly installed in the 2008 Mazda CX-9 under the name MZI 3.7. Ford Company used this 3.7L V6 engine in a variety of heavy Ford's and Lincoln's vehicle models (SUVs, Pickups and full-size sedans). Among them are the Ford F150, Ford Edge Sport, Lincoln MKS, Lincoln MKT. In 2011, the 3.7 Cyclone V6 became a standard engine in the Ford Mustang replacing the 4.0L Cologne V6.

The 3.7L Duratec has a cast aluminum alloy cylinder block with contemporary architecture. It has a removable rear main seal cover plate and a structural rear sump cast aluminum oil pan. All Cyclone engines have the same 86.6 mm (3.41 in) stroke. The additional displacement comes from an increased bore size by 3.0 mm comparing to the 3.5-liter version. The cylinders feature cast-in liners and are fully floating at the top of the engine block (open-deck type). The engine is equipped with a forged crankshaft made from 4130 alloy steel, 6-bolt billet steel main caps, and cast-in piston oil squirters.

Aluminum alloy cylinder heads have four valves per cylinder and two chain-driven camshafts on top. A primary timing chain drives a water pump and intake camshafts only. The intake camshaft for each cylinder bank provides rotation to the exhaust camshaft via a secondary small single-roller chain.Until 2011, the engine comes with variable cam timing (iVCT) on the intake camshafts. The twin-independent variable cam timing (Ti-VCT) on both intake and exhaust was presented in 2011. The valvetrain uses Ford's Direct Actuating Mechanical Buckets. The lobe contact surface of the bucket is highly polished. The valve sizes are (1.45 inches) intake and (1.22 inches) exhaust. Both valves have 5.5 mm stems. The intake valve lift is 9.8 mm (0.385 inches), the exhaust valve lift is approximately 9.1 mm (0.360 inches). The engine uses Ford's stretchy FEAD (front-end accessory drive), which has no idlers or tensioners to rob power from the engine.

On top of the engine, there is a two-piece intake manifold. The fuel injectors are located in the lower intake piece. Both lower and upper intake manifolds are made from plastic. The exhaust manifolds are cast iron. 3.7 Ti-VCT engines in the Mustang and F-150 have manifolds, carrying the shape of the oval exhaust ports to the collector.

For the F150 and Mustang models, Ford replaced the 3.7 V6 engine by a smaller, less powerful 3.5L Ti-VCT V6 in 2015, but still keeps it on their production line for some vehicles.

Engine Specs

Manufacturer

Ford Motor Company, the USA;Mazda Motor Corporation , Hiroshima, Japan

Production years

2007-present

Cylinder block material

Aluminum

Cylinder head material

Aluminum

Fuel system

Sequential multi-port fuel injection

Configuration

V

Number of cylinders

6

Valves per cylinder

4

Valvetrain layout

DOHC

Bore, mm

95.5 mm (3.76 in)

Stroke, mm

86.6 mm (3.41 in)

Displacement, cc

3,726 cc (227.4 cu in)

Type of internal combustion engine

Four-stroke, naturally aspirated

Compression Ratio

10.5:1

Power, hp

268-305 hp (200-227 kW)/ 6,250-6,500

Torque, lb ft

260-280 lb-ft (353-380 Nm)/ 4,000-4,250

Engine weight

-

Firing order

1-4-2-5-3-6

Engine oil weight

SAE 5W-20

Engine oil capacity, liter

5.7 l (6.0 qt) - with oil filter

Oil change interval, mile

10,000 (15,000 km) / 12 months

Applications

Ford F-150, Ford Mustang, Ford Edge Sport, Ford Transit, Mazda CX-9, Mazda 6, Lincoln MKS, Lincoln MKT, Lincoln MKZ, Lincoln MKX, Lincoln Continental, Radical RXC V6, Ginetta G60

Ford 3.7 V6 Duratec/Ti-VCT Engine Problems and Reliability

In general, 3.7-liter Cyclone engines have proven to be very reliable. With proper and timely maintenance, the life expectancy is well over 200,000 miles (300,000 km). But the Cyclone family has a few problems and design flaws, which can significantly shorten the life span of these engines. One of them is cam torque actuated phasers failure - pretty common for the Ti-VCT engines.

But the most dangerous component inside Ford 3.7 Duratec/Ti-VCT and Mazda MZI 3.7 is a chain-driven water pump, hiding behind an engine front cover, which able to destroy them in a few minutes. In previous versions of the Duratec V6, a water pump was located at the rear of the engine and was driven by the pulley on the intake camshaft via a belt, what seems more complicated and expensive to produce. And, in 2006, the pump was relocated under a front-end engine cover.

In the latest Duratec version, the chain-driven pump at the front also performs the function of an intermediate timing chain sprocket, which turns the vector of applying force by 120 degrees. Water pump bearings failure causes the movement of the timing center, which leads to unpredictable serious damages inside valvetrain and cylinders. Besides that, the coolant leakage that's supposed to weep out the front of the timing cover through a special passage ends up in the engine oil and forms a milky oil-in-coolant emulsion inside the engine. With this "milk oil", the engine suffers from incredible wear and corrosion of all internal components.

2011+ Cyclone V6 engines (3.7 V6 Ti-VCT as well) are less prone to water pump issues due to a revised design of the timing chain and sprockets.

Modifications

The British manufacturer Radical Sportscars equips their Radical RXC V6 models (track-only race cars and street-legal road cars) with Ford's 3.7L V6s. This engine produces 350 hp (261 kW) at 6,250 rpm and 320 lb-ft (434 Nm) of torque at 4,250 rpm. Another British company, the Ginetta Cars, used a 3.7 Ti-VCT engine for the 2012-2015 Ginetta G60. This engine delivered 310 hp (231 kW) at 6,250 rpm and 288 lb-ft (390 Nm) of torque at 4,500 rpm.

← More Ford Engines

3.7L V6 Duratec/Ti-VCT Engine  - In-Depth Look at Design and Reliability (2024)

FAQs

Is the 3.7 L V6 reliable? ›

Piston ring landings can cause engine sludge buildup

Most reviews suggest that the 3.7L isn't a bad engine. Many owners rave about its long-term reliability. It is prone to a few problems that you should be on the lookout for if you own or are considering a Jeep with the 3.7L (225.8 ci) engine.

Is the Mustang 3.7 L V6 a good engine? ›

For many, the V6 has many compromises compared to the more powerful V8, but others find it to be the sweet spot between the base unit and the thirsty Coyote 5.0. One Mustang owner believes there's no reason to go for the more expensive Mustang GT and the 3.7 V6 is more than adequate for everyday driving.

How much horsepower does a 3.7 L Ti-VCT V6 engine have? ›

3.7L Ti-VCT V6

The standard 3.7L V6 delivers responsive performance with 275 horsepower and 260 lb. -ft.

Is Ford Duratec V6 reliable? ›

The Duratec V6 engines are not the best it has to be said. The most common problems are head gaskets, piston slap and bore wear, and big end/ main bearing failure. In the last year we (I work for a Ford dealer) have replaced nine or ten engines, and they aren't that common an engine.

What is a TI VCT V6 engine? ›

The legendary Ford F-150 is one model that has a VCT engine as an option. It comes in the form of a 3.5L V6 or 5.0L Ti-VCT V8 engine. “TI” stands for Twin Independent. It is a variation that gives you even more power, thanks to its ability to slow the timing of the intake and exhaust camshafts at the same time.

Why did Ford discontinue the V6 Mustang? ›

No, Ford discontinuing V6 Mustangs in 2018 wasn't due to them outselling V8s. Several factors contributed to this decision: 1. Declining V6 Popularity: While V6 Mustangs offered good affordability and fuel efficiency, their sales steadily declined compared to V8s and Ecoboost models.

What is the best engine in a Mustang? ›

If you're looking for a reliable engine that can deliver excellent performance, the Ford 302 small block or Ford 351 Windsor are great options. If you're looking for a high-performance engine that can deliver raw power and acceleration, the Ford 390 FE big block or Ford 428 Cobra Jet are excellent choices.

How many miles per gallon does a 3.7 Mustang get? ›

2015 Ford Mustang
EPA MPGOwner MPG Estimates
2015 Ford Mustang 6 cyl, 3.7 L, Manual 6-spd
22 combined city/highway MPG 19 city 27 highway 4.5 gals/ 100 milesNot Available How can I share my MPG?
2015 Ford Mustang 8 cyl, 5.0 L, Manual 6-spd
Regular GasolineView Estimates How can I share my MPG?
20 more rows

Is the 3.5 Duratec a good engine? ›

The Duratec 35 wins its first 10 Best Engines award largely for the versatility those goals suggest: The engine is thrusty and refined and demonstrates decent, if not necessarily game-changing, fuel-economy (we've yet to see a “performance” V-6 sip fuel). Ford 3.5L DOHC V-6 is clean-sheet design.

Is the 3.5 EcoBoost a Duratec engine? ›

Gen1 3.5L EcoBoost is based on the Duratec 3.5 V6 aluminum engine block. This engine utilizes gasoline direct injection (2150 PSI) for maximum knock resistance, fuel efficiency and performance.

Which Duratec engine is best? ›

The Duratec is a Ford Engine Brand name, like the Zetec was for the 1990's. The full engine name you want is the Duratec HE. The oldest ones are found in 1998 model year onwards Mondeo's in 1.8 and 2.0L. But the best one to to go for is the 2.0L out of the CMax / ST150 Fiesta / Mk2 Focus and Mondeo from 2004 onwards.

Is the Duratec a Mazda engine? ›

The Ford Duratec 20 engines are built in Dearborn, Michigan, United States, and Chihuahua, Mexico, with some being built by Mazda in Hiroshima, Japan. The plastic intake manifold on early versions of the 1.8 and 2.0 has a major fault due to poor-quality materials.

How reliable is the 3.6 L V6? ›

The overall reliability of the 3.6 Liter Pentastar V6 engine is above average and generally considered to be good. The engine has been used in various vehicles for over a decade and has proven to be reliable in most cases.

Is the 3.8 L V6 reliable? ›

They're very reliable if you look after them if they're a Buick engine,up until the LN3 engine which is what Holden ran in the VN series 1 Commodore which leaked oil out of the 2 piece rear main rope oil seal & the Welch plugs leaked which Holden replaced under warranty & GM added 3 aerobic pellets to help seal any ...

How big is a 3.7-liter V6 engine? ›

3.7 L. The Duratec 37 is a 3.7 L; 227.4 cu in (3,726 cc) version of the Cyclone V6 intended to power heavier or premium vehicles. The 3.7 L's additional displacement comes from an increase in bore diameter to 95.5 mm (3.76 in), stroke remains identical to the 3.5 L at 86.7 mm (3.41 in).

How many miles per gallon does a 3.7 V6 Mustang get? ›

2015 Ford Mustang
EPA MPGOwner MPG Estimates
2015 Ford Mustang 6 cyl, 3.7 L, Manual 6-spd
Regular GasolineView Estimates How can I share my MPG?
25 combined city/highway MPG 21 city 31 highway 4.0 gals/ 100 miles
2015 Ford Mustang 8 cyl, 5.0 L, Automatic 6-spd
20 more rows

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