Volvo Penta D25A MS Operator's Manual page 79

Important Bolts and Nuts D30
Description
Cylinder Head
Cylinder head nozzle gland (studs)
Rocker case
Rocker shaft
Rocker arm lock nuts
Bridge lock nuts
Camshaft gear
Camshaft thrust plate
Main bearing caps
Hanger
Piston cooling nozzle
Timing gear case
Rear plate
Oil pan
Front mounting bracket
Rear mounting bracket
Connecting rod bearing caps
Flywheel
Viscous damper
Rear idler shaft
Rear idler shaft thrust plate
Exhaust manifold V-clamp nuts
Exhaust manifold mounting bolts
Exhaust pipe V-clamps
Oil pump
Oil pump cover
Fresh water pump
Fresh water pump shaft pulley (nuts)
(a) Wet , apply lubrication oil to the threads of the nut and bolt.
(b) 2-step tightening method,
(c) Tighten cylinder head bolts according to the angle method, tighten to 294 Nm [30 kpm; 217 lbf.ft], then tighten 60° more.
(d) Extremely important to use torque wrench in tightening the piston cooling nozzles. Failure to do so may result in excessive
tightening torque, which may cause valve malfunctions that could lead to seizing of pistons due to insufficient lubrication.
(e) Tighten connecting rod caps according to the angle method, tighten to 245 Nm [25 kpm; 181 lbf.ft], then tighten 60° more.
Plus d'informations sur : www.dbmoteurs.fr
Thread
Diam.xPitch Nm
(M-Thread)
22 x 2,5 539
14 x 2,0 69-78
12 x 1,25 108
14 x 2,0 147
12 x 1,25 64
10 x 1,25 55
12 x 1,25 127
12 x 1,25 59
22 x 2,5 490
12 x 1,25 108
12 x 1,75 34
16 x 1,5 216
12 x 1,25 108
12 x 1,25 59
12 x 1,25 108
16 x 1,5 216
22 x 1,5 539
22 x 1,5 539
22 x 1,5 490
12 x 1,25 108
10 x 1,25 29
8 x 1,25 19,6
1/4 x 28 9
10 x 1,5 98
12 x 1,25 108
10 x 1,25 26,3-39,7
12 x 1,25 59
24 x 1,5 245
Torque
kpm lbf.ft Notes
55 398 (a)(b)(c)
7-8 51-58
11 80
15 108
6,5 47
5,6 40
13 94
6 43
50 362 (a)
11 80
3,5 25 (d)
22 159
11 80
6 43
11 80
22 159
55 398 (a) (e)
55 398 (a)
50 362
11 80
3 22
2 14,5
0,9 6,5 UNF
10 72
11 80
2,7-4,1 18-32
6 43
25 181 For alternator drive.
Technical Data
79