Cylinder Head Overview

WARNING: This page is about a different car, the 2010 Volkswagen Jetta and 2009 Volkswagen Jetta. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

Only remove the plastic protectors installed to protect the open valves immediately before fitting the cylinder head.

When replacing the cylinder head or cylinder head gasket, the coolant must be completely replaced.

Cylinder heads with cracks between the valve seats can continue to be used without reducing service life, as long as the cracks have a Max. width of 0.5 mm.

After working on the valvetrain and lifters, carefully rotate the crankshaft by hand at least 2 full revolutions before starting to be sure that valves do not strike the pistons.

Always replace self-locking nuts, seals, gaskets and clamps.

Fig 1: Identifying Cylinder Head Overview

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

Cylinder Head
- See the note above.
- Checking for distortion, refer to Fig 2.
- Removing and installing, refer to CYLINDER HEAD .
- All of the coolant must be replaced after installation.
- Checking the compression, refer to COMPRESSION, CHECKING .
Washer
- For the cylinder head bolt.
Cylinder Head Bolt
- Observe the sequence for loosening and tightening, refer to CYLINDER HEAD .
- Before installing, insert the washers -item 2- into the cylinder head.
Stud Bolt
- 25 Nm
Lifting Eye
Gasket
- Always replace.
Vacuum Pump
CAUTION:
Do not disassemble the vacuum pump under any circumstances because it can cause the vacuum part to malfunction. The result would be brake booster failure.
- Removing and installing, refer to VACUUM PUMP .
Bolt
- 10 Nm
Coolant Connection
- Coolant hose connection diagram. Refer to COOLANT HOSE CONNECTION DIAGRAM .
Bolt
- 10 Nm
Seal
- Always replace.
Bolt
- 25 Nm
Lifting Eye
Cylinder Head Gasket
- Always replace.
- Observe the identification, refer to Fig 3.
- All of the coolant must be replaced after removing and installing.
Camshaft Position Sensor -G40-
- For the camshaft position.
Bolt
- 10 Nm

Fig 2: Identifying Check Of Cylinder Head For Distortion

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

Special tools and workshop equipment required

Straight Edge 500 mm VAS 6075
Feeler Gauge

Procedure

-- Check the cylinder head for distortion using straight edge 500 mm VAS 6075 and feeler gauge in several places.

Max. permissible distortion: 0.10 mm

NOTE:

Remanufacturing diesel cylinder heads is not permitted.

Fig 3: Identifying Cylinder Head Gasket Identification

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

Part number = -arrow 1-
Control code = -arrow 2- (ignore this!)
Holes = -arrow 3-
Installed position: the mark faces up.

NOTE:

Depending on piston projection, varying cylinder head gasket thicknesses can be installed. When replacing the gasket, install a new gasket with the same identification -arrow 3-.

Determine the piston position at Top Dead Center (TDC) when installing new pistons or a partial engine. Refer to PISTON PROJECTION IN TDC, CHECKING .