Group
21
Reconditioning engine
Install piston rings
Note position of oil ring gap.
Cleaning, checking
C30
Grind down 5 mm
(0.20
in)
Grind flush
C31
Check if chain dampers and tensioners are of ear-
ly or late type
Early types must be replaced with new ones.
IMPORTANT! Late type chain tensioners may only be used
with late type chain dampers.
Early type Late type
1 bent chain damper . without oilway with oilway
2 chain tensioner 0 = 0.4 mm 0 = 1.2 mm
(0.016") (0.047")
3 straight chain
damper L = 174 mm
L
= 220 mm
(6.85") (8.66")
IMPORTANT! On B 27 engines manufactured up to
approx. middle of 1976 a bent chain damper with a
small mounting is fitted.
When replacing this type with a late type chain damper,
late type screws, washers and spacers must be fitted.
In addition two faces on the timing gear case must be
ground to make space for the new wider dampers. One
face must be ground down by 5 mm and the other
flush.
C32
Clean,
check chain tensioners and chain dam-
pers
Important! Do not disassemble tensioners. If locking pin
falls out, complete tensioner must be replaced.
Check that oilways in chain tensioners do not leak.
Check dampers for damage and wear.
Replace parts as necessary.
35
To Next Page
Loading...
