Exhaust Manifold Installation LTD, LE5

Caution: Refer to Fastener Caution in the Preface section.




1. Install new exhaust manifold studs (1) and tighten to 10 N·m (89 lb in).



2. Install the exhaust manifold gasket (2).
3. Install the exhaust manifold (1) to the cylinder head.
4. Install NEW exhaust manifold to cylinder head retaining nuts finger tight.



5. Tighten the NEW exhaust manifold to cylinder head retaining nuts in sequence. Tighten the nuts a second time to 15 N·m (11 lb ft).



6. Coat the threads of the oxygen sensor (1) with antiseize GM P/N 12397953 or equivalent.
7. Install the oxygen sensor and tighten to 42 N·m (31 lb ft).



8. Install the block heater (1) and tighten the bolt to 10 N·m (89 lb in).



9. Install the exhaust manifold heat shield (1).
10. Install the exhaust manifold heat shield bolts and tighten to 25 N·m (18 lb ft).