Serious. On the intake manifold a leak sucking in of air will cause a lean
running condition generating excessive heat if the computer is unable to adjust by adding more gas to the mixture.
The 1997 Buick LeSabre intake manifold bolt torque specifications is 45 pounds per square inch. The manifold bolts should be torqued in 15 pound intervals.
replace the water heater inlet pipe on the intake manifold on a 3800
You did not mention if it was the intake to the cylinder head bolts (1993 buick lesabre 96 in-lbs)..... or ..... the intake upper to lower bolts ( 1993 buick 132 in -lbs) but i hope you will know wich you are looking at since there is a large difference in torqe.
The IAT sensor is located on the intake manifold air cleaning housing or air duct.
Most likely a cracked intake manifold.
The torque specification for the lower intake manifold on a 2004 Buick LeSabre with a 3.8L engine is typically around 11 lb-ft (15 Nm). It's important to follow a specific tightening sequence in multiple steps to ensure even pressure across the manifold. Always refer to a repair manual for the precise procedure and torque sequence for your specific vehicle.
Most EGR valves are located on the intake manifold with a vacuum line attached. Most are held on with two bolts.
The MAP (Manifold Absolute Pressure) sensor on a 2005 Buick LeSabre is typically located on the intake manifold. It is usually mounted near the throttle body, often on the driver's side of the engine. To access it, you may need to remove some engine covers or components around the intake area. Always consult a repair manual for specific details related to your vehicle.
Manifold Absolute Pressure/Barometric Pressure Sensor
The 1997 Buick LeSabre mass airflow sensor is located on the outside of the air intake housing. The sensor can be found on the right hand side of the air intake housing.
Manifold ait temperature sensor circuit. Year and model?
Its at the rear of the engine in the intake manifold. Take the 2 bolts off that hold it and clean all of the carbon before installing the new one.