Pontiac Montana Spark plugs Replacing?

PLEASE NOTE:--The Procedure is Similar for Chevrolet Uplander, Pontiac Montana, Saturn Relay, Buick Terraza car models.

Spark Plugs

REMOVAL & INSTALLATION

INSPECTION & GAPPING

Details are mentioned below:----

Removal & Installation

3.5L Engine

1. Replacing the engine left bank spark plugs requires, rotating the engine for access as follows:
   1. Remove the throttle body air inlet duct.
   2. Set the park brake.
   3. Shift the transaxle into Neutral.
   4. Remove the engine mount strut bolts. Swing the engine mount struts aside.
   5. Install the Engine Tilt Strap J-41131.
   6. Pull on the engine in order to rotate the engine forward.
   7. Tighten the strap.
2. Remove the spark plug wires from the spark plugs.
3. Remove the spark plugs from the engine.

To install:

1. Install the spark plugs to the engine and tighten to 11 ft. lbs. (15 Nm). If installing the spark plugs into a new cylinder head, tighten to 15 ft. lbs. (20 Nm).
2. Install the spark plug wires to the spark plugs.
3. If the engine was rotated for access, return engine to original position.

3.9L Engine

1. Remove the air intake assembly.
2. Remove the intake manifold.
3. Remove the left side spark plug wires.
4. Rotate the engine for access as follows:
   1. Set the parking brake.
   2. Shift the transaxle into neutral.
   3. Remove the engine mount strut bolts. Swing the engine mount struts aside.
   4. Install the Engine Tilt Strap J-41131.
   5. Pull on the engine in order to rotate the engine forward.
   6. Tighten the strap.
5. Remove the right side spark plug wires.
6. Remove the spark plugs.

To install:

1. Install the spark plugs to the engine and tighten to 11 ft. lbs. (15 Nm).
2. Install the spark plug wires to the spark plugs.
3. If the engine was rotated for access, return engine to original position.
4. The remainder of the installation is the reverse order of removal.

Inspection & Gapping

Check the plugs for deposits and wear. If they are not going to be replaced, clean the plugs thoroughly. Remember that any kind of deposit will decrease the efficiency of the plug. Plugs can be cleaned on a spark plug cleaning machine, which can sometimes be found in service stations, or you can do an acceptable job of cleaning with a stiff brush. If the plugs are cleaned, the electrodes must be filed flat. Use an ignition points file, not an emery board or the like, which will leave deposits. The electrodes must be filed perfectly flat with sharp edges; rounded edges reduce the spark plug voltage by as much as 50%.

Check spark plug gap before installation. The ground electrode (the L-shaped one connected to the body of the plug) must be parallel to the center electrode and the specified size wire gauge (please refer to the Tune-Up Specifications chart for details) must pass between the electrodes with a slight drag.

NOTE

NEVER adjust the gap on a used platinum type spark plug.

Always check the gap on new plugs as they are not always set correctly at the factory. Do not use a flat feeler gauge when measuring the gap on a used plug, because the reading may be inaccurate. A round-wire type gapping tool is the best way to check the gap. The correct gauge should pass through the electrode gap with a slight drag. If you're in doubt, try one size smaller and one larger. The smaller gauge should go through easily, while the larger one shouldn't go through at all. Wire gapping tools usually have a bending tool attached. Use that to adjust the side electrode until the proper distance is obtained. Absolutely never attempt to bend the center electrode. Also, be careful not to bend the side electrode too far or too often as it may weaken and break off within the engine, requiring removal of the cylinder head to retrieve it.

 

Fig. Inspect the spark plug to determine engine running conditions

Fig. A variety of tools and gauges are needed for spark plug service

Fig. Checking the spark plug gap with a feeler gauge

Fig. Adjusting the spark plug gap

Fig. If the standard plug is in good condition, the electrode may be filed flat-WARNING: do not file platinum plugs

These details will help.

Thanks.

FOR MORE HELP GO TO: ---

Car repair guide?

http://technoanswers.blogspot.in/2012/03/car-repair-guide.html