1. To check the condition of the thermal valve, disconnect the hose going to the vacuum regulator of the ignition distributor sensor, disconnect the hose from the tee and blow into this hose. At a coolant temperature of 13±3°C, the valve should be open. It should close at a temperature of 20±3°C.
2. When installing the valve, add coolant to the norm.
Checking the thermal valve (Mercedes-Benz E-Class W123)
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The article has been verified: Levin Kirill Glebovich
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