Checking the valve opening pressure (Renault Laguna 2)

If fluid leaks through the expansion tank cap valve, it must be replaced.

Install the MS 554-06 fixture on the MS 554-07 pump, then install the valve to be tested on the fixture

Increase the pressure. It should stabilize at the valve opening pressure. Control tolerance ±0.1 bar.

Valve opening pressure

Engine	Valve color	Opening pressure, bar
All models	Brown	1.2

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