300SD (126.120) L5-3.0L DSL Turbo (617.951) (1982)
Valve Spring: Application and ID
23
Valve guide
62
Valve spring retainer
63
Capnut
63a
Counternut
64
Valve spring
66
Valve stem seal
69
Rotocap
70
Valve
NOTE: Each valve has one valve spring (64) and one rotocap (69).
On engines with long service life, it is recommended to renew rotocaps at the same time.
Valve springs with higher spring tension are installed on engine 617.950 since January 1979 and on engines 617.951/952 since start of series.
On engine 617.951/952, do not install valve spring, part No. 180 053 06 20.
On the other hand, on engine 617.950 (USA) up to model year 1980 with increased output, valve spring part No. 615 053 01 20 may also be installed.
Production breakpoint
Engine
Starting vehicle ident end No.
617.950
006303
617.951/952
Start of series
Identification:
Valve spring, part No. 180 053 06 20, two green or purple-green color dots.
Valve spring, part No. 615 053 01 20, two yellow or purple-yellow color dots.
Renew damaged cap nuts (63). Cap nuts are available in three versions:
1st version: Cap nut with small supporting surface (A).