Component Markings And Distinguishing Features

WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2013 Porsche 911, 2012 Porsche 911, 2011 Porsche 911, 2010 Porsche 911, and 2009 Porsche 911. However, it is still accessible from the selected car via links, so may be relevant.

Markings:

Camshafts:

Intake side:

3.8-Liter engine, MA 1.01: Intake camshaft (short) on cylinder bank 4-6, marking: 9A1.014.03 E4-6
3.8-Liter engine, MA 1.01: Intake camshaft on cylinder bank 1-3, marking: 9A1.013.03 E1-3

3.6-Liter engine, MA 1.02: Intake camshaft (short) on cylinder bank 4-6, marking: 9A1.028.03 E4-6
3.6-Liter engine, MA 1.02: Intake camshaft on cylinder bank 1-3, marking: 9A1.027.03 E1-3

Fig 1: Identifying Intake Camshafts
Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Outlet side:

3.8-Liter engine, MA 1.01: Outlet camshaft (short) on cylinder bank 4-6, marking: 9A1.216.03 A4-6
3.8-Liter engine, MA 1.01: Outlet camshaft on cylinder bank 1-3, marking: 9A1.215.03 A1-3

3.6-Liter engine, MA 1.02: Outlet camshaft (short) on cylinder bank 4-6, marking: 9A1.224.03 A4-6
3.6-Liter engine, MA 1.02: Outlet camshaft on cylinder bank 1-3, marking: 9A1.223.03 A1-3

Fig 2: Identifying Outlet Camshafts
Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Distinguishing features of outlet sprockets:

1-3 - Sprocket for outlet camshaft on cylinder 1-3, driver for high-pressure pump: Recess 15 mm and 11.6 mm deep.
4-6 - Sprocket for outlet camshaft on cylinder 4-6, driver for vacuum pump, both recesses 11.6 mm deep.

Fig 3: Identifying Outlet Sprockets
Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Camshaft mount:

Bearing saddle: Matching number for upper and lower part for cylinder head, engraved on front (chain box side).
Bearing cover: Matching number for cylinder head and allocation to intake and outlet side of cylinder (e.g. A1 for outlet cylinder 1), engraved.