Mercedes-Benz 603 Service Manual page 139

(1) . . . . . . . . . . . . . . . . . . . . . . .
Cylinder head
Data
Test pressure with air under water
Special tools
115 589 34 63 00
Commercially available tool
Electrically heated water basin
01.10 - 420/2
check for air bubbles exiting.
Note
Air bubbles indicate a leak, locate exit point for
air bubbles more precisely if possible.
e.g. Otto Dtirr,
D-7123 Sachsenheim-
Ochsenbach
EXIT
2 bar