Answer
Aug 10, 2025 - 12:35 AM
The manual you're looking at now, the "How to Hotrod Your Buick V6," does cover the 231 CID (3.8L) engine in extreme detail. However, it's important to know that this is a specialized performance builder's guide. Its focus is on machining, blueprinting, modifying, and building the engine for high-performance and racing applications—not standard factory repair.
For the day-to-day repair and diagnostic procedures you're looking for, that information is contained within the service manual for the specific vehicle the engine was originally in (for example, a 1986 Buick Regal or a 1979 Century). The factory repair manual for the car itself will have all the step-by-step troubleshooting, component replacement instructions, and stock specifications for your 231 V6 engine.
If you know the original year and model of the car your engine came from, you can search for that vehicle on our site to find the correct repair manual. If you're not sure or can't find what you're looking for, please feel free to contact our support team. Let us know what you're working on, and we'll be happy to point you in the right direction.
