500SEL (126.037) V8-5.0L (117.963) (1984)
1
Closing nut
2
A 25 x 30 aluminium seal
3
Spherical seat ring
4
5 mm dia.ball
5
Ball cage
6
Valve disc
7
O-ring
8
5mm dia.ball
9
Compression spring
10
Thrust pin
11
Compression spring
12
Housing
13
B16 snap ring
Since June 1980 a chain tensioner with a reinforced flange (17 mm before 12 mm) has been installed. Fit on chain tensioner with 17 mm thick flange
with M 8 x 30 bolts (previously M 8 x 25).
The dimensions of the chain tensioner housing and of the closing nut have been modified. Production break- point October 1981. These measures were
taken to counter fractured, leaking closing nuts.
Chain tensioner housing: Size 1.2-02 was 1.5 mm.
Closing nut: size 15.5 + 02 was 14.5 mm.