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            Vacuum Canister

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            How to Install a New Vacuum Canister

            You may not know it, but your vehicle's vacuum canister plays an important role in your engine. It acts as a reservoir that helps maintain a vacuum supply to the HVAC (heating, ventilation, air conditioning) system whenever the vehicle accelerates. Its main function is to provide a steady supply of vacuum for the power brake booster. That is why the canister should store enough vacuum to allow the brake pedal to have power assist in case your engine stalls. When your vacuum canister wears out, it is important that you replace it as soon as you can. If left ignored, it can cause your engine to succumb to damage, which is definitely costly. Replace your old vacuum canister with ease using this guide.

            Difficulty level: Moderate

            What you'll need:

            • Pipe thread sealant or Teflon tape
            • Extra power brake type vacuum hose
            • Replacement vacuum canister

            Step 1: Using the pipe thread sealant, install the proper fittings in the vacuum canister. Mount the tank in a convenient location, preferably under the hood and near the vacuum booster to keep it from getting exposed to exhaust head or debris. Ensure easy hose routing when mounting the tank.

            Step 2: Remove the power brake vacuum hose from the engine and the brake booster. Install the new hose from the same engine vacuum source to the plastic check valve on the tank. Remember to use power brake type vacuum hose only to ensure that you will not lose your braking power. Make sure that you route it away from high temperature and debris that could cause damage.

            Step 3: Install a vacuum hose from the outlet fitting on the tank to the check valve on the brake booster. Make sure that you use power brake type hose and route it away from external factors. This is to ensure that it will last longer before it wears out.

            Step 4: Try to start your engine at a high speed idle for a few seconds. This is to evacuate the extra reservoir tank. You may try at about 1400 to 1600 RPM. Check if the reservoir tank and booster are empty when you start the engine. If it is, then an erratic idle will occur until the tanks are evacuated.

            Step 5: Check if you have a good power brake feel when the vacuum is 10 inches or more in the reservoir and booster. Remember that every time you depress the brake pedal, you will lose vacuum in the reservoir.

            Step 6: When you're done, test drive the vehicle to ensure that the vacuum reserve system is properly functioning. It is important that you keep from applying brakes until the engine has enough time to build up vacuum in the canister.

            You may finish the installation of your new vacuum canister in about an hour or two. Make it a point to do regular check-ups with your vehicle to ensure that its components are all working fine. Once you see signs of wear and tear, replace the part immediately.

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