Thinking that the check valve in the Airtex pump I had put in 2.5 years ago was on its way out, I ordered a Delphi unit. The use of a inch pound torque wrench is desirable because it is more accurate at most lower settings.I had been getting longer and longer crank times on my '00 V6 Mustang, and after hooking up a pressure gauge to the rail, noticed an immediate drop-off in pressure.
Always torque cross to cross or pattern specified by FORD. Once you have reached the maximum recommended torque setting, go around one more time. I recommend that you use the 3 step torque technique where you torque down the bolts in three equal steps. If you use special bolts, follow the torque specifications provided by the manufacturer. Horsepower 300 5750 rpm / Torque 320 rpmġ3.6 quarts – use yellow colored only DO NOT MIX COLORS!Īll torque specifications provided in this table are those recommended by FORD. Throttle control on the V-8 was controlled electronically just as it was with the 4.0-litre V-6. When the driver put their foot down on the accelerator and engine speeds rose or when under heavy loads these flaps would then open fully allowing maximum air flow into the combustion chamber. These flaps would close at light loads and low engine speeds causing the air entering the engine to speed up and induce a tumble effect in the combustion chamber allowing fuel and air to mix more thoroughly and burn efficiently. At the end of these runners was another new feature to the Mustang called a charge motion valve. Since the Mustang employed a single overhead cam design the VCT system operated both the intake and exhaust valves simultaneously.Ĭrowning the improved V-8 was an all new intake system featuring an intake manifold with tuned runners. This in turn causes the camshaft to rotate slightly from its initial orientation thus resulting in the camshaft timing being advanced or retarded depending on the needs of the PCM. When the Powertrain Control Module (PCM) requires a change in cam timing, depending on factors such as engine load and RPM, it will send a signal to the hydraulic valves to regulate oil flow to the phaser cavity. The system works by directing high pressure oil through electronically controlled hydraulic valves into the camshaft phaser cavity. Variable Camshaft Timing (VCT) allows for better engine performance, increased fuel efficiency and reduced emissions by electronically adjusting the camshaft timing. Operating the valves was the camshaft lifted directly from the 5.4 Triton engine along with another innovation that was a first for any Mustang Variable Camshaft Timing.
The new heads allowed engineers to raise the compression ratio to 9.8:1 while still being able to safely run on regular grade fuel. These aluminum three valve-per-cylinder heads allowed the engine to breath better at high engine speeds since they allowed the incoming air a more direct, port-style path to the two intake valves. Once again, the cracked-powdered-metal connecting rods were used after proving their durability in past modular motor Mustangs.īolted to the top of the aluminum block was a pair of new cylinder heads that were taken from the 5.4-litre Triton truck engine. Inside the block was a set of short skirt aluminum pistons with an antifriction coating and wrapped with high-tension piston rings for longer life and better oil control. While the modular V-8 still displaced 4.6 liters, the engine block was now cast out of lighter aluminum rather than iron saving 75-pounds and featured a deep skirt for added strength. 2005 Mustang Engine Information – 281 cubic inch V-8 (4.6 L Ford Modular V8) Ford’s Modular 4.6L SOHC V8