The OE valve springs are subject to breakage, bending or fatigue failure. Broken portions of the spring can cause the associated valve to stick in either the fully applied or released position. A fatigued spring will not have enough force to fully stroke the valve to the released position. Complaints vary depending upon specific location, but can be seen in the chart. The Sonnax springs will restore proper function to the associated valve when replacing a broken, bent or fatigued spring.
APPLICATIONS
Explorer 2002-2003 V6 4.0L; V8 4.6L 5 Spd RWD 4X4
Explorer, Sport Trac 2004-2007 V6 4.0L 5 Spd RWD 4X4
Explorer, Sport Trac 2004-2005 V8 4.6L 5 Spd RWD 4X4
Mustang 2005-2007 V6 4.0L: V8 4.6L 5 Spd RWD
Thunderbird 2002 V8 3.9L 5 Spd RWD
Thunderbird 2003-2005 V8 3.9L 5 Spd RWD
S Type 2002 V6 3.0L; V8 4.0L 5 Spd RWD
XK8 2002 V8 4.0L 5 Spd RWD
XKR, XKR 100 2002 V8 4.0L 5 Spd RWD
Aviator 2003-2005 V8 4.6L 5 Spd RWD 4X4
LS 2002 V6 3.0L; V8 3.9L 5 Spd RWD
LS 2003-2006 V6 3.0L; V8 3.9L 5 Spd RWD
Mountaineer 2002-2003 V6 4.0L; V8 4.6L 5 Spd RWD 4X4
Mountaineer 2004-2007 V6 4.0L 5 Spd RWD 4X4