How to Install a Car Windshield

1. Remove the screws holding the rearview mirror onto the windshield. The retaining block and mirror should slide out easily. Lift up and remove the windshield wipers.
2. Inspect the gasket that surrounds the windshield. It should be replaced if it is cracked or brittle. If you are replacing the gasket, you can simply cut out the windshield. Insert your knife in the middle of the rubber gasket, but do not scrape against the glass. Slice the rubber all the way around and push the windshield out from inside the car.
3. If you will be keeping the existing gasket, use a wooden stick to break the seal. Run the stick around the gasket where it hits the car's frame. Push gently on the windshield from inside the car with your foot. Use the stick to push under the inside lip at the top of the windshield opening. Have a friend sit on top of the car to catch the windshield when it pops out of the seal.
4. Apply a small amount of sealant on the bottom half of the rubber gasket and place it around the new windshield. The slotted side should be facing the outside with the heavier side on the inside.
5. Coat the outer groove of the windshield opening with petroleum jelly to make it easier to push in the windshield. Set the new windshield into the opening and push around the perimeter until it is securely seated. Use a rubber hammer to gently tap the windshield into place if necessary. Wipe off any excess petroleum jelly and sealant from the car's frame and replace the windshield wipers and rearview mirror.