fits model: 400, Std. make: Gmc. year: 1974–1980.

( Brand: American Hammered ), ( Manufacturer Part Number: 5004-STD ), ( Part Type: Ring Piston ), ( Country/region Of Manufacture: United States ), ( Waukesha: 195gk, 195gka, 195gkb, 6mk, 6mkr, 6srs )
The 5004-std 1974-1980 GMC 400 IHC Red361/401 Standard Piston Ring Set is a high-quality replacement part designed specifically for the 1974 to 1980 models of GMC vehicles equipped with the 400 cubic inch (6.6 L) inline-six engine, also known as the Red361 or Red401. This piston ring set is manufactured to meet the original equipment specifications, ensuring a precise fit and optimal engine performance.
The set includes four piston rings: two compression rings, one oil control ring, and one oil scraper ring. The compression rings are responsible for sealing the combustion chamber and maintaining the correct cylinder pressure, while the oil control ring helps manage the oil consumption by controlling the oil flow into the crankcase. The oil scraper ring, on the other hand, prevents oil from accumulating on the piston tops, reducing the risk of engine knocking.
Each piston ring in this set is made of high-carbon steel and is hammered for a textured surface. The hammering process creates a rough surface, which increases the friction between the rings and the cylinder walls, improving the ring's sealing ability and extending its service life. The rings are also heat-treated to ensure they can withstand the high temperatures and pressures inside the engine cylinder.
This American-made piston ring set is an excellent choice for DIY enthusiasts and professional mechanics looking for a reliable and durable replacement part. The set includes comprehensive installation instructions to ensure an easy and hassle-free installation process. With its high-quality materials, precise fit, and hammered surface, this 5004-std 1974-1980 GMC 400 IHC Red361/401 Standard Piston Ring Set is an excellent investment in maintaining the performance and longevity of your GMC engine.
Pros of buying 5004-std 1974-1980 GMC 400 IHC Red361/401 std piston ring set:1. Compatibility: This piston ring set is specifically designed for the Red361 and 401 engines used in 1974-1980 GMC vehicles, ensuring a perfect fit and performance.
2. Quality: American-made hammered rings offer superior sealing capabilities, reducing the chance of leaks and enhancing engine efficiency.
3. Durability: Piston rings made from high-quality materials can last longer, reducing the need for frequent replacements.
4. Availability: Being a standard part, it is likely to be widely available from various automotive parts suppliers, making it easy to find and purchase.
Cons of buying 5004-std 1974-1980 GMC 400 IHC Red361/401 std piston ring set:1. Cost: High-quality parts such as these can be more expensive than less durable alternatives.
2. Installation: Installing piston rings can be a challenging task, requiring specialized tools and knowledge. Improper installation can lead to engine damage.
3. Potential for Engine Disassembly: To replace the piston rings, the engine might need to be disassembled, which can be a time-consuming and labor-intensive process.
Conclusion:The 5004-std 1974-1980 GMC 400 IHC Red361/401 std piston ring set is a reliable and durable option for maintaining the performance of your engine. While it may require specialized tools and knowledge for installation and can be more expensive than other options, the benefits of improved engine efficiency and reduced leaks make it a worthwhile investment for those seeking long-term engine reliability.
Recommendation:If you are comfortable with engine maintenance or have access to a professional mechanic, the 5004-std 1974-1980 GMC 400 IHC Red361/401 std piston ring set is a recommended option for ensuring optimal engine performance. When shopping, be sure to compare prices from various suppliers to find the best deal.
With the four ring pistons. These are in diameter with compression rings and oil.
All new old stock rings I sell are satisfaction guaranteed or you money back.