64 12 577 Replacing changeover valve for independent/auxiliary heating
WARNING: This page is about a different variant/trim than selected.
WARNING:
Risk of scalding!
Only perform the following repair work on an engine that has cooled down.
Follow notes for repair work on cooling system . See 17 00 039 VENTING AND FILLING COOLING SYSTEM WITH VACUUM FILLING UNIT , 17 00 039 BLEED COOLING SYSTEM AND CHECK FOR WATERTIGHTNESS (N52T, N53, N55) or 17 00 039 BLEEDING COOLING SYSTEM AND CHECKING FOR WATERTIGHTNESS (N63 B44 O 0) .
Only perform the following repair work on an engine that has cooled down.
Follow notes for repair work on cooling system . See 17 00 039 VENTING AND FILLING COOLING SYSTEM WITH VACUUM FILLING UNIT , 17 00 039 BLEED COOLING SYSTEM AND CHECK FOR WATERTIGHTNESS (N52T, N53, N55) or 17 00 039 BLEEDING COOLING SYSTEM AND CHECKING FOR WATERTIGHTNESS (N63 B44 O 0) .
Necessary preliminary work:
IMPORTANT:
Risk of damage!
Observe marked coolant flow direction.
Observe marked coolant flow direction.
NOTE:
Mark position of coolant hoses prior to dismantling.
Release spring clamps (1) and detach coolant hoses.
Unfasten plug connection (1) and disconnect.
Unfasten screws (2).
Remove changeover valve for independent/auxiliary heating (3).
After installation:
Top up coolant and vent cooling system . See 17 00 039 VENTING AND FILLING COOLING SYSTEM WITH VACUUM FILLING UNIT , 17 00 039 BLEED COOLING SYSTEM AND CHECK FOR WATERTIGHTNESS (N52T, N53, N55) or 17 00 039 BLEEDING COOLING SYSTEM AND CHECKING FOR WATERTIGHTNESS (N63 B44 O 0) .