• Chevrolet introduced the first Impala in 1958, after which time it became one of the manufacturer's best-selling cars. In 2000, it was available in two trim levels--the base model and the LS, each with a different engine. Manufacturers set specifications for its components, such as torque specifications, which are expressed in foot-pounds. To ensure engine stability, engine bolts must be torqued or bolted down to a certain weight specification under manufacturer guidelines.
  
  

Engines

• The base model Impala sported a 3.4 liter V6 engine with a bore of 3.6 inches, a stroke of 3.3 inches, and a compression ratio of 9.5-to-1. This engine could produce 180 horsepower at 5,200 rpm and 205 pound-feet of torque at 4,000 rpm.
  
  The LS model Impala had a 3.8 liter V6 engine with a bore of 3.8 inches, a stroke of 3.4 inches, and a compression ratio of 9.4 to one. It could produce 200 horsepower at 5,200 rpm and 225 foot-pounds of torque at 4,000 rpm.
  
  

3.4-Liter V6

• For the 3.4-liter engine, the crankshaft bolts to the engine block with 37 lb-ft of torque and the crankshaft position sensor does so with 8 foot-pounds. To prevent leaks, screw the drain plug to the oil pan at 18 lb-ft of torque. The flywheel-to-crankshaft bolt screws to 60 foot-pounds of torque. The intake manifold connects with the cylinder head with 30 lb-ft of torque, and the exhaust manifold connects to the cylinder head with 9.67 lb-ft.
  
  

3.8-Liter V6

• In the 2000 Impala LS, the crankshaft-to-engine-block bolt screws to 30 lb-ft of torque. The drain plug bolts to the oil pan with 18 lb-ft and the cylinder head bolts to the engine block with 37 lb-ft. Bolt the exhaust and intake manifolds to the cylinder head with 11 lb-ft of torque. The flywheel connects to the crankshaft with 11 lb-ft. The oil pan requires 10.42 lb-ft of torque to connect with the engine block properly.