Volvo DH10A 245 Service Manual page 7

Valve clearance, cold engine
Inlet ......................................
Exhaust ................................
INLET
EXHAUST
Adjust the valves as follows:
When no. 1 cyl. piston is at T.D.C. after compression,
adjust valves 1, 2, 4, 5, 8 and 9.
When no. 6 cyl. piston is at T.D.C. after compression,
adjust valves 3, 6, 7, 10, 11 and 12.
Valve seat inserts
Outer diameter (meas. A) standard
Inlet ......................................
Exhaust ................................
Oversize
Inlet ......................................
Exhaust ................................
Height (meas. B)
Inlet ......................................
Exhaust ................................
Recess for valve seat inserts
Diameter (meas. C), standard
Inlet ......................................
Exhaust ................................
Diameter (meas. C), oversize
Inlet ......................................
Exhaust ................................
6
0.40 mm
0.70 mm
54 mm
49 mm
54.2 mm
49.2 mm
6.8 mm
9.5 mm
54.00–54.03 mm
49.00–49.025 mm
54.20–54.23 mm
49.20–49.225 mm
Depth (meas. D)
Inlet ......................................
Exhaust ................................
Recess bottom radius (meas. R)
Inlet ......................................
Exhaust ................................
Meas. between valve disc
and cylinder head face should
be min.
Inlet ......................................
Exhaust ................................
The valve seat may be ground
so far that the distance from the
valve disc (new valve) to the
cylinder head face is max.:
Inlet ......................................
Exhaust ................................
If the distance is greater, replace the seats.
Valve guides
Inside diameter
Inlet ......................................
Exhaust ................................
Height above cylinder head
spring face
Inlet ......................................
Exhaust ................................
Max. permitted clearance between
valve stem and valve guide
Inlet ......................................
Exhaust ................................
Valve springs
Outer valve spring
Length, off-load ........................
With 300–390 N
(30–39 kp) load .........................
Inner valve spring
Length, off-load ........................
With 80–170 N
(8–17 kp) load ...........................
8.8–8.9 mm
11.8–11.9 mm
0.5–0.8 mm
0.5–0.8 mm
0.05–0.50 mm
1.2–1.7 mm
1.5 mm
2.5 mm
11.02–11.04 mm
11.02–11.04 mm
20 mm
21 mm
0.15 mm
0.25 mm
61 mm
49.6 mm
53 mm
42.6 mm