Tredia L4-1795cc 1.8L SOHC Turbo (1984)
Timing Belt Tensioner: Technical Service Bulletins
Engine - Timing Belt Tension Adjustment
SUBJECT:
TIMING BELT TENSION ADJUSTMENT
NO.
STB-85-09-017
DATE
December, 1985
MODEL 1983-1985 4G6 Engines
PURPOSE
STB Revision
STB-85-09-017
This bulletin contains instructions for tightening the camshaft drive belt on 4G6 engines (1.8L, 2.0L, and 2.4L engines) to increase belt tension and
eliminate a source of engine noise at idle and low rpm. The belt-tensioning procedure in the 1985 Service Manuals is still valid for non-airconditioned
cars and all 2.0L trucks; this new procedure applies to air-conditioned cars. As reference to this bulletin, please write the STB number in the revision box
on Page 9-35 of the 1985 Truck Service Manual.
FIGURE 1
PROCEDURE
1.
Determine that the cause of the noise is the timing belt.
2.
Remove the timing belt upper cover (Fig. 1).
3.
Remove the A/C belt and idler pulley.
FIGURE 2
4.
Remove the access covers on the lower timing belt housing (Fig. 2).
5.
Set #1 cylinder on TDC.
6.
Loosen the belt tensioner bolt and nut to preset the tension, and then tighten.
