Engine - Repair of Tapped Holes With Thread Inserts: Overview

MODEL
960

GROUP
21

NUMBER
916

REPAIR OF TAPPED HOLES

B6304F 1992-->

MARKET
US and Canada

DATE
January 1993

REFERENCE:
TP 31714/2 (ENGLISH); 05/91; B6304 ENGINE TP 31614/1 (ENGLISH); 06/90; ENGINE B19, B23

Repair of tapped holes with thread inserts

Internal threads frequently require repair when working on the cylinder block, intermediate section and cylinder head. Thread inserts can be used for this purpose. In some cases, due to lack of sufficient material thickness around the thread, this is not possible.

This bulletin describes the procedure for repairing holes with thread inserts and also specifies the holes which must not be repaired on the B6304F engine.

WARNING:
The use of protective equipment such is safety goggles and a mask is recommended.

Thread inserts





Thread inserts are made of cold-rolled wire and are formed with ISO thread profiles. The material is a rust and acid-resistant steel. The inserts are designed for installation in tapped holes as specified in the standard thread insert tables.

Each insert is provided with a notched tang which is broken off after installation.

Installation Tools

Refer to TP 31614/1, Engine B19, B23, page 24.