Checking the tightening torque of the throttle body mounting bolts (Chevrolet Tahoe 1)

1. Throttle body (TBI module) is attached to the top of the intake manifold with several bolts. These bolts will loosen over time due to vibrations and frequent temperature changes during normal engine operation, resulting in a disruption of the normal fuel mixture composition due to air leakage.

2. If the throttle pipe is not tight enough, you will hear air hissing at the base of the pipe. To do this, attach one end of the hose to the pipe flange and put your ear to the other end of the hose. A hissing sound will indicate air leakage.

3. Remove the air filter, marking the hoses to facilitate assembly.

4. Tighten the bolts to the torque specified in Technical Data (see photo). Exceeding the tightening torque above the norm is not permitted, as the thread may be stripped.



6..If after tightening the bolts the air leak does not stop, remove the throttle pipe and replace the gasket (see Chapter 4).

7. Install the air filter and connect all hoses.

(The text of the article was obtained from the website: ChevyMan.ru)