Expansion tank cap check
The T4 cooling system works under some pressure to increase efficiency.
The role of the safety valve is performed by the stopper of the expansion tank. It opens at a pressure of 1.2 -1.5 atm (0.12-0.15 MPa). To check the plug, use the tool described above (see Fig. 231). If the plug opens outside the specified pressure ranges, replace it.
Rice. 231 System leak tester
Buy coolant Transporter T4.