Re-Torque Intake And Exhaust Manifold Cap Screws And Nuts

RG13846-UN-11JAN05

Re-Torque Intake and Exhaust Manifold Cap Screws and Nuts

A - Intake Manifold Cap Screws

B - Exhaust Manifold Nuts

IMPORTANT: During break-in, re-torque intake/exhaust manifold cap screws and nuts after first 2500 miles of new engine operation or replacement of manifold.

After break-in, for school buses, re-torque the intake and exhaust manifolds every 12 months/25,000 miles. For refuse trucks/transit buses, re-torque the intake and exhaust manifolds every 12 months/12,500 miles.

1. Remove exhaust manifold heat shield.

2. Tighten intake manifold cap screws (A) to specification.

   Item	Measurement	Specification
   Intake Manifold Cap Screws	Torque	47 N˙m (35 lb-ft)

3. Tighten exhaust manifold nuts (B) to specification.

   Item	Measurement	Specification
   Exhaust Manifold Nuts	Torque	47 N˙m (35 lb-ft)

4. Install heat shield and tighten cap screws to specification.

   Item	Measurement	Specification
   Intake Manifold Heat Shield Cap Screws	Torque	22 N˙m (16 lb-ft) (195 lb-in.)