Engine cooling,  M110

Testing radiator or expansion tank closing cap



20—430 Testing radiator or expansion tank closing cap


Radiator or expansion tank closing cap


Pressure relief valve opens at
new cap
1.0 ^.q’]^ bar 9au9e pressure
used cap
1.0—0.2 bar gauge pressure
m110 - 0783-1.jpg
Vacuum valve opens starting at 0.1 bar vacuum


Special tools


Tester for cooling system and radiator cap
m110 - 0783-2.jpg
001 589 48 21 00


Double connection for radiator cap in combination with cooling system tester
m110 - 0783-3.jpg
000 589 73 63 00


Checking pressure relief valve
m110 - 0783-4.jpg
1    Attach double connection to leak tester by means of holding clips.
2   Place radiator cap on double connection.
3   Check opening pressure by pumping.


Checking vacuum valve


Vacuum valve (arrow) should rest against rubber seal, should lift off easily and snap back following release.
m110 - 0783-5.jpg


20.2-430/1 F3