Pontiac Repair Questions? Ask a Mechanic for Answers ASAP
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2.3L and 2.4L Engines
See Figures 1 through 5
WARNING The timing chain and sprockets on the 2.4L (VIN T) is not to be replaced with any other timing chain from any other model year than the one you are working on. In other words, if you have a 1996 model, ONLY a 1996 chain can be used. Failure to use the correct year chain will result in damage to the engine. The sprockets are different on the twin-cam engine and the shape of the links matches the sprockets for each year. It is recommended that this entire procedure be reviewed before attempting to service the timing chain.
The following tools will be required to perform this procedure:
Camshaft sprocket timing alignment pins-J 36008 or equivalent Camshaft sprocket wrench-J 39579 or equivalent
Fig. Fig. 1: View of the DOHC engine "timed position"-2.3L and 2.4L engines
Fig. Fig. 2: View of the SOHC engine "timed position"-2.3L engine
On the 2.3L engine two styles of tensioners are used. Early production engines will have a spring post and late production ones will not. Both styles are identical in operation and are interchangeable.
Do NOT try to pry the sprocket off the camshaft or damage to the sprocket or chain housing could occur.
CAUTION The tensioner piston is spring loaded and could fly out causing personal injury. Use care when removing.
To install:WARNING Failure to following installation procedures can result in severe engine damage.
Fig. Fig. 3: Placing the camshaft sprockets onto the marked surface of the camshaft
Do NOT rotate the crankshaft clockwise to TDC, or valve and piston damage could occur.
WARNING The side of the timing chain that was marked must be facing outward when installed.
Fig. Fig. 4: Place the timing chain over the exhaust camshaft and around the idler sprocket and around the crankshaft sprocketDOHC engines
Fig. Fig. 5: View of reloading the timing chain tensioner assembly to its "zero" position-1992-98 vehicles
WARNING If the engine is not correctly timed, severe engine damage could occur.