2001 Mustang Engine Information – V6 (3.8L & 3.9L Ford Essex V6)
The Ford Essex V6
The 3.8 L Essex V6 replaced the 3.3 L I6, as the 3.3 L engine had little demand and was dropped after 1982. The 3.8 liter engine was used from 1983 to 1986, it was then dropped from the Mustang line. It reappears as a Mustang engine in 1994 and is used until 2004, replaced by the 4.0 liter engine in 2005.
The 3.8 L V6 was updated for 1999 to use the split port cylinder heads originally introduced on the Windstar. However the 1999–2000 Mustang did not use IMRC, instead leaving all 12 intake runners open at all times. Output of the V6 in these Mustangs was 190 hp at 5250 rpm and 220 lb/ft of torque at 2750 rpm. With the addition of IMRC to Mustang in 2001, engine output increased slightly to 193 hp at 5500 rpm and 225 lb/ft of torque at 2800 rpm.
During the second half of the 2004 model year, the 3.8 L Essex was replaced with the 3.9 L OHV Essex V6. The 3.9 L had a slightly longer stroke but output for the engine remained identical to the outgoing 3.8 L. The 3.9 L Essex was used in the Mustang for only half a year before being replaced by the 4.0 L Cologne V6 for the 2005 model year.
232 cu / 3.8 liters – 237 cu / 3.9 liters
193 hp @ 5,500 RPM
225 lb/ft @ 2,800 RPM
Bore x Stroke
3.81 × 3.39
3.8 Liter Engine Specs
Firing Order: 1-4-2-5-3-6
LH cylinders front to rear: 1-2-3
RH cylinders front to rear: 4-5-6
Valve order left head: E-I-E-I-E-I
Valve order right head: I-E-I-E-IE
Cylinder compression pressure 101 PSI minimum
Spark plugs 1994 & 1995 AWSF44-PP @0.052″
Spark plugs 1996 & 1997 SP-482 @ 0.052-0.056
Spark plugs 1998 SP-482 @ 0.054
Spark plugs 1999 to 2002 SP-482 @ 0.054
Spark plugs 2003 & 2004 SP-482 @ 0.054
Thermostat starts to open 193-200 degrees
Thermostat fully open
Radiator cap pressure: 16
Engine & Other Torque Specifications
All torque specifications provided in this table are those recommended by FORD. If you use special bolts, follow the torque specifications provided by the manufacturer. I recommend that you use the 3 step torque technique where you torque down the bolts in three equal steps. Once you have reached the maximum recommended torque setting, go around one more time. Do not torque in a circular pattern. Always torque cross to cross.