Volvo B27A - Page 18

Group 21 Reconditioning engine
Thread repairs
A4
Thread repair insert,
drill diameter
0
Thread Length mm
M 6x1 9.0
12.0
M7x1 10.5
14.0
M 8x1.25 8.0
11.4
16.0
M 10x1.5 10.0
15.0
20.0
25.0
M 12x1.5 12.0
24.0
30.0
M 14x1.25 14.5
M 14x1.5 10.0
M 16x1.5 12.0
Mx18x1.5 13.5
5/88"x18UNF 8.0
P/N
956014-5
956015-2
948015-3
941843-5
956017-8
956018-6
956019-4
956021-0
956022-8
956023-6
956024-4
948094-8
948095-5
956028-5
948756-2
948758-8
947847-0
947843-9
948755-4
Drill dia mm
6.3
6.3
7.3
7.3
8.4
8.4
8.4
10.5
10.5
10.5
10.5
12.5
12.5
12.5
14.3
14.5
16.5
18.5
16.4
16
Combination tap
Tap section
Reamer section
Guide
A5
Repairing spark plug threads
Cylinder head must be removed first. Tap hole from in-
side to avoid damaging seat for spark plug.
Do not drill the hole. Use tap 998 5823-5.
Re-cut old threads only. Do not cut further into
cylinder head. Spark plug bore must not be threaded
along entire length.
Screw in thread insert (P/N 948756-2).