The 3.1L V6 is a sixty-degree sequential fuel-injected six-cylinder engine produced by General Motors for Chevy, Olds, and Buick sedans from 1993 - 2005. The engine had a 3.5-inch bore and 3.122 inches, a compression ratio of 8.9:1, and was a replacement for the multi-port fuel-injected LHO engine.. The Specs of the GM 3100 V6. Item 3.1L.. Overview of the Chevy 3.1 Liter V6 Engine. The Chevy 3.1 liter V6 engine is a popular choice for many GM vehicles due to its combination of power, efficiency, and reliability. This engine, also known as the GM 3100, has been in production since the early 1990s and has undergone several updates to improve its performance and durability. One of.
View large pictures below of common coolant leak areas on the GM 3100 and 3400 V6 engine. The intake manifold gaskets are the most likely cause of your antifreeze leaking and engine oil getting low. Location #1 in the picture below is on the passenger side front of the engine behind the front timing cover. Location #2 is a little harder to see.. The GM Chevy 3.1L is a popular V6 engine used in many GM and Chevy vehicles. It was introduced in 1988, and after several upgrades and variations, it is was last used in 2005. Whichever year the GM Chevy 3.1L V6 was built, they all have the same firing order, cylinder locations, and Bank-1 and Bank-2 sides of the engine.