Volkswagen Passat 1995 Official Factory Repair Manual page 349

Cylinder head removal and installation
http://ebahn.bentleypublishers.com/vw/servlet/Display?action=Goto&type=repair&id=VW...
Compression pressure, checking
Special tools, testers and auxiliary items
Compression tester US 1120
Test conditions
Engine oil temperature min. 30 C (86 F)
- Disconnect harness connector for engine speed
(RPM) sensor G28.
- Disconnect ignition coil power output stage
N157.
- Open throttle all the way (wide open throttle).
- Install compression tester US 1120.
Note:
Using the compression tester
instructions.
- Operate starter until compression tester gauge
shows no further pressure increase.
Compression pressure specifications
New: 10-13 bar (145-189 psi)
Wear limit: 7.5 bar (109 psi)
Permissible difference between all cylinders: 3
bar (44 psi)
Page 9 of 9
15-8
Operating
5/12/2004