Compression Pressure, Checking

WARNING: This page is about a different variant/trim than selected.

Special tools and workshop equipment required

Glow Plug Socket 3220
Compression Tester Kit VAG1763 with Compression Tester Kit - Adapter 8 VAG1763/8

Procedure

Fig 1: Identifying Engine Cover -Arrows-

Courtesy of AUDI OF AMERICA, LLC

Engine oil temperature approximately 80° C
Battery voltage at least 12.5 V.

-- Carefully pull the engine cover off the 4 bolts one after the other -arrows-.

-- Disconnect the connector on the Fuel Pressure Regulator Valve -N276- -1- on the cylinder bank 1 (right) rail.

Fig 2: Identifying Connector From Fuel Pressure Regulator Valve -1-

Courtesy of AUDI OF AMERICA, LLC

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

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

Fig 3: Identifying Socket 3320 To Remove Glow Plugs

Courtesy of AUDI OF AMERICA, LLC

-- Install the Compression Tester Kit - Adapter 8 VAG1763/8 in place of the glow plugs and connect the Compression Tester Kit VAG1763.

Fig 4: Identifying Adapter V.A.G 1763/8 And Compression Tester V.A.G 1763

Courtesy of AUDI OF AMERICA, LLC

NOTE:

For information on using the tester, refer to the Operating Instructions.

-- Have a second technician operate the starter until the test stops showing an increase in pressure.

-- Repeat procedure on each cylinder.

Compression pressure	bar pressure
New	28 to 33
Wear limit	21
Maximum difference between cylinders	5

Assembling

Assemble in reverse order of disassembling. Note the following:

-- Install the glow plugs. Refer to GLOW PLUGS, REMOVING AND INSTALLING .

-- If the engine was started while the connectors were disconnected, faults will be stored in the engine control module: "check the DTC memory" in "OBD" Vehicle Diagnostic Tester.