J2000 L4-112 1.8L VIN 0 TBI (1982)
Timing Belt: All Technical Service Bulletins
Timing Belt - Adjustment to Revised Belt
Number 86-6(Gasoline)-34 Date 4/86
Subject:
TIMING BELT ADJUSTMENT
1982-1986 SUNBIRD WITH 1.8L OHC ENGINE (VIN CODE 0 AND J)
FIGURE 1 - GAUGE DIAL FACE
A new 20 mm wide timing belt, P/N 90234902 has been released for production and service on 1982 thru 1986 1.8L OHC engines.
When a new timing belt is installed and tensioned, the engine must be turned over (without starting) approximately 10 revolutions. As the new belt takes
a set position, a substantial tension loss will occur, and the timing belt must then be re-tensioned.
When a new 20 mm wide timing belt is installed or an existing 19 mm wide timing belt is re-tensioned, it must be tensioned to within the band (between
two arrows on perimeter of gauge dial face) as shown in Figure 1. The band represents 150N (30 lbs.) on a cold engine. The timing belt tension gauge,
J-26486-A was an essential tool included originally in the T-1000 tool package. This same tool was reworked and released for the 1.8L OHC engine.
Because of the importance of correct timing belt tensioning, it is imperative all dealerships use the gauge that has accurate calibrations.
NOTICE:
ALL TENSION ADJUSTMENTS ARE TO BE MADE ON A COLD ENGINE. THIS IS A PROCEDURAL CHANGE FROM
PREVIOUS BULLETINS AND SECTION 6A1-12, STEP 5, OF THE 1986 PONTIAC SUNBIRD SERVICE MANUAL.
Use applicable labor time and labor operation for this operation.
