GM Service Manual Online
For 1990-2009 cars only

Exhaust System Tightening Specifications

Application

N·m

Lb Ft

Lb In

All Hanger Bolts to Frame

25

18

--

Converter Pipe Flange Bolts to Muffler (2.2L)

30

23

--

Converter Pipe Flange Bolts to Muffler (4.3L)

17

13

--

Converter to Bracket 2WD (2.2 & 4.3L)

32

24

--

Exhaust Manifold Stud (4.3L)

33

24

--

Exhaust Manifold Bolts (center two) 4.3L

36

26

--

Exhaust Manifold Bolts (all others) 4.3L

28

20

--

Exhaust Manifold Nuts (2.2L)

13

--

115

Exhaust Pipe to Exhaust Manifold Bolts (2.2L)

20

15

--

Exhaust Pipe to Exhaust Manifold Stud Nut (4.3L)

28

20

--

Exhaust Pipe to Muffler Clamp Nut

50

37

--