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The 1976 to 1977 the engine received a new cylinder-head design, incorporating hydraulic lifters to replace the taper-screw valve adjusters, improved coolant pathways, longer-life valve-stem seals, a redesigned water pump and thermostat, and a five-year, 60,000-mile (97,000 km) engine warranty. The engine's name was changed to Dura-Built 140.
The result is an engine that fails to maintain idle RPM and frequently stalls. A jammed actuator may be freed simply by cleaning it. However an actuator that has stopped working due to a fault in its servomotor will need replacement. Air leaks in either the stepper housing or pipes will cause elevated idle RPM.
Instead, the position of the throttle valve (i.e., the amount of air in the engine) is fully controlled by the ETC software via the electric motor. But just opening or closing the throttle valve by sending a new signal to the electric motor is an open loop condition and leads to inaccurate control.
A thermostat exerts control by switching heating or cooling devices on or off, or by regulating the flow of a heat transfer fluid as needed, to maintain the correct temperature. A thermostat can often be the main control unit for a heating or cooling system, in applications ranging from ambient air control to automotive coolant control.
This engine family was updated in 1968 for the use of 2.45 in (62.2 mm) medium-sized journals. The first engine in this family was the small journal 327 in 1962 and the last being 2000s medium journal 350 in pickup trucks and commercial vehicles. The medium journal 350 was further developed into the Generation II LT1/4 350 in the early 1990s.
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Holiday get-togethers often feature a lot of alcohol. If you’re trying to reduce your intake, here’s how to plan ahead and still have a celebratory holiday season.
Timothee´Chalamet, left, sang Bob Dylan's songs himself in the new biopic "A Complete Unknown."
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