Skoda Octavia Workshop Manual page 112

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Cooling System
Testing cooling system for leaks
Special tools, testers and aids required
♦ Cooling system tester V.A.G 1274
♦ Adapter V.A.G 1274/8
♦ Adapter V.A.G 1274/9
Test condition
l Engine at operating temperature
Test procedure
- Open cap of coolant expansion reservoir.
Important!
Hot steam may escape when the expansion re-
servoir is open. Cover over cap with cloth and open
carefully.
K - Mount tester V.A.G 1274 with adapter V.A.G
1274/8 onto the expansion reservoir.
- Operate the priming pump of the tester to
produce a pressure of about 0.1 MPa.
- If the pressure drops, locate the leakage
point and rectify.
Testing pressure relief valve in cap
- Screw cap onto the tester using adapter
V.A.G 1274/9.
- Operate the priming pump of the tester to
produce a pressure of about 0.15 MPa.
- The pressure relief valve should open at a
pressure of 0.12 ... 0.15 MPa.
OCTAVIA
Edition 08.96
S00.5104.50.20