SECTION 303-01B: Engine 4.0L SOHC 1998 Explorer/Mountaineer Workshop Manual IN-VEHICLE REPAIR Procedure revision date: 10/17/2002 Timing Drive Components Camshaft Timing Special Tool(s) Timing Chain Tensioner 303 571 (T97T-6K254-A) Camshaft Gear Removal Tool 303 575 (T97T-6256-F) Camshaft Gear Torque Adapter 303 565 (T97T-6256-G) Camshaft Gear Holding Tool 303 564 (T97T-6256-B) Camshaft Gear Holding Tool Adapter 303 578 (T97T-6256-A) Camshaft Holding Tool 303 577 (T97T-6256-C) Crankshaft Holding Tool 303 573 (T97T-6303-A) Camshaft Holding Tool Adapter 303 576 (T97T-6256-D)
1. Remove the valve covers. For additional information, refer to Valve Cover RH Valve Cover LH and in this section. 2. Remove the lower intake manifold. For additional information, refer to Intake Manifold Lower in this section. 3. Remove the fuel supply manifold. For additional information, refer to Section 303-04C. 4. Remove the accessory drive belt. For additional information, refer tosection 303-05. 5. Remove the thermostat housing. For additional information, refer tosection 303-03. 6. Remove the roller followers. For additional information, refer to Roller Followers in this section. 7. Remove the nut and position the A/C manifold and tube assembly bracket aside. 8. NOTE: You must re-time the LH and RH camshafts when either camshaft is disturbed. Turn the crankshaft one revolution clockwise. 9. NOTE: The special tool must be installed on the damper and should contact the engine block, this positions the engine at top dead center (TDC). Install the special tool.
10. CAUTION: The right-hand camshaft sprocket bolt is a left-hand threaded bolt. Using the special tool, loosen the RH camshaft sprocket bolt. 11. NOTE: The camshaft timing slots are off-center. Position the camshaft timing slots below the centerline of the camshaft to correctly fit the special tools and install the special tools on the front of the RH cylinder head. 12. NOTE: Leave the top two special tool clamp bolts loose. Install the special tools on the rear of the RH cylinder head. 13. Raise and support the vehicle. For additional information, refer to Section 100-02. 14. Remove the RH wheel and tire. For additional information, refer to Section 204-04. 15. Remove the RH lower splash splash.
16. Remove the RH camshaft tensioner and install the special tool. 17. Lower the vehicle. 18. CAUTION: The right-hand camshaft sprocket bolt is a left-hand threaded bolt. Tighten the bolts. 1. Tighten the special tool top two clamp bolts to 10 Nm (89 lb-in). 2. Tighten the camshaft bolt. 19. Remove the special tool.
20. NOTE: When using a new washer the camshaft tensioner must be torqued to 44 Nm (32 lb-ft). Install the RH camshaft tensioner. 21. Raise the vehicle. 22. Install the RH lower splash shield. 23. Install the RH wheel and tire. For additional information, refer to Section 204-04. 24. Lower the vehicle. 25. Remove the special tools from the RH cylinder head. 26. Install the special tools on the front of the LH cylinder head and tighten the top two clamp bolts to 10 Nm (89 lb-in).
27. Loosen the LH camshaft sprocket bolt. 28. Loosen the top two clamp bolts on the special tool to allow the camshaft sprocket to rotate freely. 29. NOTE: The camshaft timing slots are off-center. Position the camshaft timing slots below the centerline of the camshaft to correctly fit the special tools, and install the special tools on the rear of the LH cylinder head. 30. Remove the LH camshaft tensioner and install the special tool.
31. Tighten the bolts. 1. Tighten the special tool top two clamp bolts to 10 Nm (89 lb-in). 2. Tighten the camshaft bolt. 32. Remove the special tool. 33. NOTE: When using a new washer the camshaft tensioner must be torqued to 44 Nm (32 lb-ft). Install the LH camshaft tensioner. 34. Remove all of the special tools. 35. Install the A/C manifold and tube assembly bracket.
36. Install the roller followers. For additional information, refer to Roller Followers in this section. 37. Install the thermostat housing. For additional information, refer tosection 303-03. 38. Install the accessory drive belt. For additional information, refer tosection 303-05. 39. Install the fuel supply manifold. For additional information, refer to Section 303-04C. 40. Install the lower intake manifold. For additional information, refer to Intake Manifold Lower in this section. 41. Install the valve covers. For additional information, refer to Valve Cover LH and Valve Cover RH in this section.