Everything about Navistar Vt Engine totally explained
The International Truck and Engine
VT 365, also sold as the
Ford Power Stroke, is a
Diesel V8 engine. It is used as the Power Stroke in Ford's
F-Series Super Duty and under the International name in the
International XT trucks. The 6.0 L Power Stroke turbodiesel was on the
Ward's 10 Best Engines list for 2003.
It is a 32-valve
pushrod V8. Bore is 3.74 in (95 mm) and stroke is 4.13 in (105 mm). Output was 325 hp (242 kW) at 3300 rpm and 560 ft·lbf (759 Nm) at 2000 rpm, but as of 2005 that was increased to at 2000 rpm. It also uses a 2nd generation HEUI (oil common rail) direct injection fuel system, as well as a variable-geometry turbocharger, which is designed to reduce turbo lag and create better throttle response.
The 6.0 L VT365 replaced the 7.3 L
T444E, also built by International in
Indianapolis, but hasn't been as successful. A high number of warranty claims (
US$50,000,000 in two years) caused Ford to discontinue their contract with International Truck and Engine to build a Diesel V6 and paying US$70,000,000 to International Truck and Engine as compensation for ending the contract. Ford considered International Truck and Engine rival,
Cummins, before deciding to design this new Diesel V6, now known as the
DT17, in-house.
Although the engines have been plagued by problems, Ford still sells 250,000 or more each year at a $5,300 premium over the gasoline engine options in its Super Duty trucks. The problems included leaky
fuel injectors, oil leaks, and sticking
turbocharger vanes. There have been 77 technical service bulletins related to the engine since its introduction.
An optional
TorqShift 5-speed automatic transmission is available for Ford trucks. This special transmission gives improved performance to the engine, featuring a tow/haul mode (for example).
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VT275
A variant of the VT365 is the new
VT275 4.5 L V-6, which is basically a 6.0 L V-8 with two cylinders chopped off. However, it uses a sequential twin-turbocharger system, instead of the single variable-geometry turbocharger used in the VT365. It is used in the new 2006
Ford LCF (Low Cab Forward) and International CF (Cab Forward) series trucks. It produces and of torque and is backed by a Ford TorqShift 5 speed automatic.
For the 2007 model year, the VT275 was brought up to 2007 EPA emissions standards and renamed the
MaxxForce 5.
6.4
The 6.4 L Power Stroke, used in 2008 model year
Ford Super Duty trucks, is a
v8 turbodiesel engine. The engine has a sequential
twin-turbo intercooled forced induction system . The engine also uses a high pressure
common rail fuel injection system . It produces at 3000 rpm and of torque at 2000 rpm .
This engine will also be used in International trucks and buses under the name
MaxxForce 7. However, the MaxxForce 7 won't have the sequential turbocharger system; rather, it'll use a single stage variable vane turbocharger. Displacement and injector systems are the same. In MaxxForce 7 guise, the engine will produce between 200-230 hp and 580-620 ft·lbf of torque.
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