300SDL (126.125) L6-3.0L DSL Turbo (603.961) (1987)
important to guard against leaks.
7. Introduce valve insert(s) into housing and fasten with the screws. Then remove insulating tape.
8. Remove housing of coupling (item 54), bend sleeves and clean off oxidation if necessary. Then plug coupling onto valve.
9. Reconnect hose for heat exchanger if fitted.
10. Pressurize cooling system and test for leaks.
11. Check function of heating system.