Fusion AWD L4-2.3L (2008)
Valve: Service and Repair
Valve Clearance Check
Valve Clearance Check
1. Remove the valve cover.
2. NOTE: Turn the engine clockwise only, and only use the crankshaft bolt.
NOTE: Before removing the camshafts, measure the clearance of each valve at base circle, with the lobe pointed away from the tappet. Failure to
measure all clearances prior to removing the camshafts will necessitate repeated removal and installation and wasted labor time.
Use a feeler gauge to measure the clearance of each valve and record its location.
3. NOTE: The number on the valve tappet only reflects the digits that follow the decimal. For example, a tappet with the number 0.650 has the
thickness of 3.650 mm.
NOTE: The nominal desired midrange clearance is:
^
intake: 0.25 mm (0.0095 inch).
^
exhaust: 0.30 mm (0.0115 inch).
Select tappets using this formula: tappet thickness = measured clearance + the base tappet thickness - most desirable thickness.
NOTE: The acceptable clearances after being fully installed are:
^
intake: 0.22-0.28 mm (0.008-0.011 inch).
^
exhaust: 0.27-0.33 mm (0.010-0.013 inch).
Select the closest tappet size available and mark the installation location.
4. If any tappets do not measure within specifications, install new tappets in these locations.
