Repairing damaged threads in subframemounting

SERVICE INFORMATION
Bulletin Nbr:	810-1583
Date: ...........	DECEMBER 1994
Market:	DK, N, FIN

Repairing damaged threads in subframe mounting

Materials

•	42 97 966 M12 thread insert

•	42 97 974 M14 thread insert

•	Drill, ø16.5 mm

•	Drill, ø18.5 mm

•	Tap, dimension M18 x 1.5

•	Tap, dimension M20 x 1.5

Procedure

If the weld nuts have become detached, but the bolt is in position, the head of the bolt must first be cut off. Then weld the weld nuts in place as follows:

1.	Disconnect the negative battery cable.

2.	Drill three holes (\ø\ 6 mm) in accordance with the measurements shown in the diagram.

3.	Center the weld nut.

4.	Plug weld the nut through the three holes in the body. Remove the bolt if it is still in the weld nut.

5.	Go over the welds with a grinder and paint them with 1 K Füll Primer.

6.	Apply rust inhibitor around the welds and inside the subframe member.

7.	Fit a new thread insert.

Fitting new thread insert.

1.	Drill out the old thread. Use a drill with ø16.5 mm on the front(A) and rear (C) attachments and a drill with ø18.5 mm on the middle (B) attachment.

2.	Tap the holes. Use tap with dimension 18 x 1.5 mm on the front (A) and rear (C) attachments, and 20 x 1.5 mm for the middle (B) attachment.

3.	Apply Loctite 242 to the thread insert and fit it in place.

4.	Then drive home the four locking pins.

Important points to bear in mind when fitting the subframe.

1.	Using a service jack, raise the subframe until it is about 20 mm from the body. Important Use new bolts for the rear subframe mounting points.

2.	Do all six bolts up by hand, starting from the center.

3.	Tighten the bolts. Tightening torque (see Fig.)

Standard time information

Object code: 71100

Fault code: 78

Localization code: 00

Action code: 05

Time:

0.4/weld nut

0.2/insert thread

Warranty information

Standard warranty rules apply.