Checking Function Of Reservoir Cap
WARNING: This page is about a different car, the 2024 Porsche 911, 2023 Porsche 911, and 2022 Porsche 911. However, it is still accessible from the selected car via links, so may be relevant.
Information
The lid has a two-stage design and as a result, two test steps are required.
- Screw on coolant cap -1- with adapter 65 -2- .
- Connect adapter 65 -2-
to > V.A.G 1274B - Tester for Cooling System-3-
and hose adapter FZ 100K.
Checking cap for leaks - Tester 1069 with adapter
Test step for stage 1:
- Build up overpressure.
The first stage opens at an overpressure of approx. 1.3 bar. The pressure then drops slowly and the valve closes at 1.0 bar. If the pressure drops further, replace the cap.
Test step for stage 2 if the minimum pressure in stage 1 is maintained:
- Apply overpressure to the valve in step 1 by pumping rapidly. The valve in step 2 must open at an overpressure of approx 1.8 bar.
If the valve does not open, replace the cap.