Compression, Checking: Procedure

WARNING: This page is about a different car, the 2015 Volkswagen Golf. However, it is still accessible from the selected car via links, so may be relevant.

Engine oil temperature approximately 80 °C (176 °F)
Battery voltage at least 12.5 V.

-- Remove the engine cover. Refer to ENGINE COVER, REMOVING AND INSTALLING .

-- Disconnect the connector on the Fuel Pressure Regulator Valve - N276- -2-.

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- In order to reduce the fuel pressure in the high pressure reservoir, start the engine briefly.

-- Remove all glow plugs. Refer to GLOW PLUG, REMOVING AND INSTALLING .

-- Install the : VAG1763/8 in place of the glow plug and connect the : VAG1763 .

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

NOTE:

Information on using the tester. Refer to the Operating Instructions.

-- Have a second technician operate the starter until the tester stops displaying a pressure increase.

-- Repeat the procedure on each cylinder.

Compression Pressure	Pressure
New	25.0 to 31.0 bar (362.59 to 449.617 psi)
Wear limit	19.0 bar (275.57 psi)
Maximum difference between cylinders	5.0 bar (72.51 psi)

Assembling

Assemble in the reverse order of removal. Note the following:

-- There will be entries stored in the engine control module DTC memory because the engine was started while the connectors were disconnected: Check DTC memory . Refer to Vehicle Diagnostic Tester.