How to Remove the Resonator on a 1990 Toyota 4Runner
- 1). Park your 4Runner in a safe location. Turn off the engine and engage the parking brake. Raise the rear of your vehicle using a car jack. Place the rear axles on jack stands to keep the vehicle elevated.
- 2). Crawl underneath your 4Runner from the rear of the vehicle. Locate the resonator. The resonator on a 4Runner resembles a small muffler, only it's located further down the exhaust pipe. The resonator is situated between the muffler and the catalytic converter. Follow the exhaust pipe toward the front of the vehicle until you reach a cylindrical container. This is your resonator.
- 3). Inspect the area where the exhaust pipe connects to the resonator. You should notice a clamping bolt that secures the exhaust pipe to the resonator. Remove the bolt nuts from the clamping bolt. Set the bolt nuts aside in a safe place.
- 4). Remove the clamping bolt once the bolt nuts are removed. Grab the exhaust pipe and firmly pull it away from the resonator. The exhaust pipe should disconnect from the resonator easily. Remove the clamping bolt from the opposite side of the resonator.
- 5). Lift the resonator out of the exhaust support to remove the resonator from the vehicle.
Source...