1. Toyota Corolla Repair Manual: You can purchase a specific repair manual or workshop guide for the 1987 Toyota Corolla. These manuals often include detailed diagrams, including those for the carburetor, along with instructions for maintenance and repair.
2. Online Parts Dealers: Some online auto parts dealerships provide access to diagrams and parts lists for older vehicles. Look for reputable auto parts retailers that allow you to select your vehicle's make, model, and year, then display related schematics and diagrams.
3. Autozone or Local Auto Parts Store: Physical auto parts stores like Autozone sometimes offer printed service materials which may include carburetor diagrams. They might also be able to direct you to online resources for additional information.
4. Toyota Classic & Special Parts: Toyota offers certain classic and older-model parts in a limited capacity. While they generally focus on preservation and restoration of vintage Toyota vehicles, you may want to check their website to see if they have documentation pertaining to the 1987 Corolla's carburetor or any compatible parts diagrams.
5. Vintage Toyota Forums and Enthusiast Sites: There are several enthusiast forums and communities dedicated to classic Toyota vehicles. Members of these communities and websites might share resources such as technical documents, diagrams, and manuals in their threads and conversations.
Remember that diagrams can vary based on factors such as region, specific carburetor components, and potential modifications to the vehicle, so consult multiple sources if necessary to gain a comprehensive understanding of your car's carburetor layout.