NOTE: Measure the clearance of each valve at base circle, with the lobe pointed away from the tappet.
3. Use a feeler gauge to measure the clearance of each valve and record its location.
Use the General Equipment: Feeler Gauge
4.
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: Select tappets using this formula: tappet thickness = measured clearance + the existing tappet thickness - nominal clearance.
NOTE: The nominal clearance is:
intake: 0.25 mm (0.0095 in).
exhaust: 0.36 mm (0.0142 in).
NOTE: The acceptable clearances after being fully installed are:
intake: 0.19-0.31 mm (0.007-0.012 in).
exhaust: 0.30-0.42 mm (0.012-0.017 in).
Original technical text and illustrations, formatted as HTML. Follow the engine, transmission, equipment, model and year specified in the source. Import and layout checks do not establish applicability to every 2015–2017 Mustang. About this collection.