Here's a general procedure. Always consult a repair manual specific to your 1997 Mercury Sable's engine for precise instructions and torque specifications. The procedure might vary slightly depending on the exact engine (e.g., 3.0L Vulcan, 3.8L Essex).
Tools You'll Likely Need:
* Crankshaft pulley puller: This is the most crucial tool. There are different types (2-jaw, 3-jaw), and you'll need one that fits your vehicle's pulley. Make absolutely sure you get the right one. Improper use can damage the crankshaft.
* Socket wrench and sockets: To remove the bolt in the center of the pulley. This bolt is often very tight and may require a breaker bar or impact wrench.
* Wrench (or socket) for the harmonic balancer bolt (if applicable): Some models have a separate harmonic balancer that needs to be removed before the pulley. Your repair manual will show whether this is necessary.
* Penetrating oil (like PB Blaster): Apply this to the crankshaft pulley bolt several hours before attempting removal to loosen it.
* Torque wrench: To correctly tighten the bolt when reinstalling the pulley.
* Jack and jack stands (or ramps): To safely lift the vehicle.
* Wheel chocks: For safety.
* Gloves and safety glasses: To protect yourself from injury.
Procedure:
1. Safety First: Disconnect the negative battery cable. Support the vehicle securely on jack stands. Engage the parking brake and use wheel chocks.
2. Access the Pulley: Locate the crankshaft pulley. You'll likely need to remove some belts and possibly other components to gain access. Consult your repair manual.
3. Loosen the Crankshaft Pulley Bolt: This is the hardest part. Use the appropriate socket and a breaker bar or impact wrench (impact is recommended). Spray penetrating oil generously beforehand and allow time to soak. Sometimes the bolt is very stubborn and can require significant force. Use caution to avoid stripping the bolt. If the bolt is truly stuck you might need heat, but be very careful applying heat to avoid damaging the timing cover.
4. Install the Pulley Puller: Carefully position the crankshaft pulley puller according to its instructions. Make sure it's securely attached to the pulley and the crankshaft. Tighten the puller's center bolt gradually and evenly to avoid damaging anything.
5. Remove the Pulley: As you tighten the puller, the pulley should start to come off the crankshaft. If it's very stuck, you might need to tap the puller with a hammer (gently!).
6. Clean: Clean the crankshaft and pulley surfaces thoroughly before reinstalling.
7. Reinstallation: Reverse the process for reinstallation. Use a torque wrench to tighten the crankshaft pulley bolt to the manufacturer's specified torque. Do not overtighten.
Important Considerations:
* Harmonic Balancer: Some vehicles have a separate harmonic balancer that needs to be removed before the pulley. Your repair manual will indicate this. Removing a harmonic balancer often requires a special puller as well.
* Professional Help: If you're not comfortable performing this repair yourself, take your vehicle to a qualified mechanic. Damage to the crankshaft or other components can be expensive to repair.
This is a general guide. Always consult a repair manual specific to your 1997 Mercury Sable for detailed instructions and torque specifications. Improper technique can lead to engine damage. If in doubt, seek professional help.
