Here's the safer and recommended procedure:
1. Consult a Repair Manual: Obtain a repair manual specific to your 1988 Cadillac Sedan DeVille's engine. This manual will contain a diagram showing the correct belt routing *with* the AC compressor and will likely show how to bypass it. This is the most reliable method. Factory service manuals are usually the best, but Haynes or Chilton manuals may also suffice.
2. Take Pictures Before Disassembly: Before removing the belt, take several clear pictures of the belt's routing. This will help you re-install it correctly if you change your mind or need to reinstall the AC compressor later.
3. Carefully Remove the Belt: Loosen the tensioner pulley (usually a spring-loaded pulley) to remove the belt. Consult your repair manual to understand how the tensioner works for your specific vehicle. Note the tensioner pulley position, how much it needs to be loosened to remove the belt, and where the belt was resting on the tensioner.
4. Remove the AC Compressor Belt: Once the belt is off, remove the AC compressor belt from the compressor pulley.
5. Route the Belt (Carefully!): This is the critical step. Try to visually determine the optimal path around the remaining pulleys, making sure the belt is not too loose or too tight. Again, this is best done with reference to your repair manual, paying attention to any diagrams on bypassing the AC compressor. If no diagrams are available in your manual, you must exercise extreme caution.
6. Re-check Tension: Once you've routed the belt around the pulleys, ensure it's properly tensioned. There should be little to no deflection when you push down on the longest span of the belt. If it's too loose, the belt will slip and could damage the pulleys or the belt itself. If it's too tight, the belt may break or put undue stress on the components.
Warnings:
* Improper routing can damage your engine: Do not attempt this without a repair manual or substantial mechanical experience.
* Incorrect tension can lead to belt slippage or breakage: This is especially dangerous as it can lead to overheating, loss of power steering, or other potentially hazardous malfunctions.
* If you are uncomfortable performing this task: Take your car to a qualified mechanic. It's far cheaper to pay a professional than to risk damaging your engine.
Remember, safety and accuracy are paramount when working with your vehicle's belt system. A repair manual is your best friend in this situation.
