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Home >> Volkswagen >> 2017 >> Jetta GLI, Automatic DCT Trans >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Engine System (Cylinder Head & VALVETRAIN System - Service Information - 1.8L; 2.0L TFSI - CPLA, CPPA, CPKA, CPRA) >> 15 Cylinder Head, VALVETRAIN >> Cylinder Head >> Compression, Checking

Compression, Checking

Special Tools And Workshop Equipment Required 

Test Sequence 

NOTE:

Engine oil temperature: minimum 30 °C (86 °F)

Battery voltage at least 12.7 V

-- Remove the ignition coils. Refer to IGNITION COILS WITH POWER OUTPUT STAGES, REMOVING AND INSTALLING .

-- Disconnect the connectors for the fuel injectors:

GWWA15-11487Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.
  1. For Cylinder 1 Fuel Injector -N30- to Cylinder 4 Fuel Injector -N33-
  2. For Cylinder 1 Fuel Injector 2 -N532- to Cylinder 4 Fuel Injector 2 -N535-

-- Remove the spark plugs using a :3122B  .

-- Check the compression pressure using the :VAG1763  and :VAG1763/6  .

GWWN15-10811Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.
NOTE:

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

-- Operate the starter until the tester no longer indicates a pressure increase.

Compression Pressure Pressure
New 11.0 to 14.0 bar (160 to 203 psi)
Wear limit 7.0 bar (101.52 psi)
Maximum difference between cylinders 3.0 bar (43.5 psi)

-- Install the spark plugs.

-- Install the ignition coils. Refer to IGNITION COILS WITH POWER OUTPUT STAGES, REMOVING AND INSTALLING .

NOTE:

By separating the connections, DTCs will be stored. After the test, check and erase the DTC memory.

-- Turn on the ignition and select the following menu items on the Vehicle Diagnostic Tester:

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