Removal and Replacement
Camshafts
WARNING: Before beginning any service procedure, REFER to Safety Warnings . Failure to follow this instruction may result in serious personal injury.
Special Tool(s)
Material(s)
Exploded View
Removal
NOTICE: During engine repair procedures, cleanliness is extremely important. Any foreign material (including any material created while cleaning gasket surfaces) that enters the oil passages, coolant passages or the oil pan can cause engine failure.
NOTICE: Do not rotate the camshafts unless instructed to in this procedure. Rotating the camshafts or crankshaft with timing components loosened or removed can cause serious damage to the valves and pistons.
NOTICE: Failure to position the No. 1 piston at TDC (Top Dead Center) can result in damage to the engine. Turn the engine in the normal direction of rotation only.
NOTICE: The 303-1565 is for camshaft alignment only. Using this tool to prevent engine rotation can result in engine damage.
NOTE: The 303-507 will contact the crankshaft and prevent it from turning past TDC (Top Dead Center). However, the crankshaft can still be rotated in the counterclockwise direction. The crankshaft must remain at the TDC (Top Dead Center) position during the camshaft removal and installation.
1. With the vehicle in NEUTRAL, position it on a hoist. REFER to Jacking and Lifting Vehicle Lifting.
2. Remove the camshaft phaser and sprockets. REFER to Camshaft Phaser and Sprocket .
3. NOTICE: The 303-1565 is for camshaft alignment only. Using this tool to prevent engine rotation can result in engine damage.
Remove 303-1565.
4. Remove the 2 bolts and the 2 VCT (Variable Camshaft Timing) oil control solenoids.
5. NOTE: Do not mark the camshaft lobe surface. If any material is applied to the camshaft lobe surface, the lobe must be cleaned with Motorcraft(R) Metal Surface Prep.
Depending on the camshaft being serviced, mark the camshaft lobe orientation onto the camshaft bearing cap.
6. NOTICE: Failure to follow the camshaft bearing cap loosening procedure can result in damage to the camshafts.
NOTE: Mark the location and orientation of each camshaft bearing cap.
If servicing the exhaust camshaft, remove the camshaft bearing cap bolts in the sequence shown and remove the exhaust camshaft.
7. NOTICE: Failure to follow the camshaft bearing cap loosening procedure can result in damage to the camshafts.
NOTE: Mark the location and orientation of each camshaft bearing cap.
If servicing the intake camshaft, remove the camshaft bearing cap bolts in the sequence shown and remove the intake camshaft.
8. Inspect the camshaft. REFER to Camshaft Surface Inspection , REFER to Camshaft Bearing Journal Diameter and REFER to Camshaft Runout .
Installation
NOTICE: During engine repair procedures, cleanliness is extremely important. Any foreign material (including any material created while cleaning gasket surfaces) that enters the oil passages, coolant passages or the oil pan can cause engine failure.
NOTICE: Do not rotate the camshafts unless instructed to in this procedure. Rotating the camshafts or crankshaft with timing components loosened or removed can cause serious damage to the valves and pistons.
NOTICE: The 303-1565 is for camshaft alignment only. Using this tool to prevent engine rotation can result in engine damage.
1. NOTICE: Install the camshafts with the alignment slots in the camshafts lined up so the 303-1565 can be installed without rotating the camshafts. Make sure the lobes on the No. 1 cylinder are in the same position as noted in the removal procedure. Rotating the camshafts when the timing chain is removed, or installing the camshafts 180 degrees out of position can cause severe damage to the valves and pistons.
Lubricate the cylinder head and camshaft journals with clean engine oil and position the camshafts onto the cylinder head in their original location and orientation.
2. NOTE: The exhaust camshaft rear bearing cap must be secured within 10 minutes of Gasket Maker application. If the valve cover is not secured within 10 minutes, the sealant must be removed and the sealing area cleaned with Motorcraft(R) Metal Surface Prep.
NOTE: Do not allow Gasket Maker to enter the camshaft bearing journal. If Gasket Maker is applied to the camshaft bearing journal, the journal and sealing area must be cleaned with Motorcraft(R) Metal Surface Prep.
Apply a 1 mm (0.0394 in) bead of Gasket Maker to the exhaust camshaft rear bearing cap as shown.
3. NOTICE: Failure to follow the camshaft bearing cap tightening procedure can result in damage to the camshafts.
NOTE: Lubricate the bearing cap journals with clean engine oil prior to installation.
If servicing the exhaust camshaft, install the camshaft bearing caps in their original location and orientation and tighten the camshaft bearing cap bolts in pairs in the sequence shown in 2 stages:
- Stage 1: Tighten to 7 Nm (62 lb-in).
- Stage 2: Tighten to 16 Nm (142 lb-in).
4. NOTICE: Failure to follow the camshaft bearing cap tightening procedure can result in damage to the camshafts.
NOTE: Lubricate the bearing cap journals with clean engine oil prior to installation.
If servicing the intake camshaft, install the camshaft bearing caps in their original location and orientation and tighten the camshaft bearing cap bolts in pairs in the sequence shown in 2 stages:
- Stage 1: Tighten to 7 Nm (62 lb-in).
- Stage 2: Tighten to 16 Nm (142 lb-in).
5. If exhaust or intake camshafts were replaced, check that the camshaft end play is within specification. REFER to Camshaft End Play .
6. If exhaust or intake camshafts were replaced, check the valve clearance. REFER to Valve Clearance Check .
7. NOTICE: The 303-1565 is for camshaft alignment only. Using this tool to prevent engine rotation can result in engine damage.
Install 303-1565 into the rear of both of the camshaft slots as shown and tighten the retainer.
8. NOTE: Lubricate the VCT (Variable Camshaft Timing) oil control solenoids with clean engine oil.
Install the 2 VCT (Variable Camshaft Timing) oil control solenoids and tighten the 2 bolts.
- Tighten to 10 Nm (89 lb-in).
9. Install the camshaft phaser and sprockets. REFER to Camshaft Phaser and Sprocket .