SECTION 303-01B: Engine — 5.0L (4V)
2014 Mustang Workshop Manual
IN-VEHICLE REPAIR
Procedure revision date: 01/07/2013

Valve Seals


Special Tool(s)
Compressor, Valve Spring
303-1418
Compressor, Valve Spring
303-300 (T87C-6565-A)
Compressor, Valve Spring
303-350 (T89P-6565-A)
Compressor, Valve Spring
303-1249

Material
Item Specification
Motorcraft® SAE 5W-20 Premium Synthetic Blend Motor Oil (US); Motorcraft® SAE 5W-20 Super Premium Motor Oil (Canada)
XO-5W20-QSP (US); CXO-5W20-LSP12 (Canada) 		WSS-M2C945-A

Removal and 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.

NOTE: If the components are to be reinstalled, they must be installed in their original locations. Mark the components for installation into their original locations.

  1. Remove the camshaft for the valve seal being serviced. For additional information, refer to Camshaft — RH and/or Camshaft — LH in this section.
  1. Remove the roller follower and hydraulic lash adjuster assembly for the valve seal being serviced.

  1. NOTICE: If air pressure must be removed, support the valve prior to removal or engine damage may occur.

    NOTE: If a valve drops into the cylinder, remove the cylinder head. For additional information, refer to Cylinder Head in this section.

    Pressurize the cylinder using compressed air.
  1. Using the Valve Spring Compressors, remove the keys, retainer and spring.
  1. Remove and discard the valve seal.
  1. To install, reverse the removal procedure.