I'm guessing that the only way to do it is to cut the metal plates in front of the speakers with a Dremel, or some kind of other cutting device.
3 and 1/2" in the front and 6x9" in the rear
Front doors, "5 1/4", rear deck is "6x9".
Dash speakers are 3 1/2 inches. They are a real pain to replace. You need to remove all lower portions of the dash.
The 1975 Oldsmobile Delta 88 typically accommodates 6x9-inch speakers in the rear deck and 5x7-inch or 6.5-inch speakers in the front doors. However, the specific size may vary based on the vehicle's original audio system configuration. It's always a good idea to measure the existing speaker openings to ensure a proper fit for replacement speakers.
you need to remove the black plastic air dam that is covering the bottom of the engine. The starter is then accessible at the front of the motor
Remove the positive cable from your 1997 Oldsmobile battery. Remove the starter cables from the front of the starter. Remove the starter retaining bolts. Reverse the process to install the new starter.
To Change the antenna, its best to remove the right front tire. Then remove the plastic wheel well cover and wella, the antenna can be easily replaced.
Standing in front of the engine, its on the left side of the engine intake. You'll have to remove that MAP sensor to get to the PCV Valve.
There are 2 located in the front door panels...and two in the rear. the rear ones are right beside the seatbelt behind the panel. Hope that helps! Fellow '88 crabriole owner! Larissa
To remove the front brakes on a 1989 Oldsmobile Delta 88, start by loosening the lug nuts on the front wheels and lifting the vehicle securely on jack stands. Remove the wheel, then take off the caliper by unscrewing the caliper bolts; support it with a hanger to avoid stress on the brake line. Next, remove the brake pads and the caliper bracket if necessary, then take off the rotor by pulling it straight off the hub. Remember to check for any additional components that may need to be removed based on your specific brake system configuration.
To replace the rear speakers, you have to go in the trunk, look towards upper back section of the trunk and you will see the speakers. The speakers have two black hand-screws that can be unscrewed without tools. It is as simple as this.
Driverside front fender. In front of the tire.