Exhaust Gas Recirculation: Service and Repair

When cleaning intake manifold EGR passages, care should be taken to ensure that all loose particles are completely removed to prevent them from clogging the EGR valve or from being ingested into the engine.
1. Remove carburetor, if applicable.
2. Disconnect vacuum hose from EGR valve, then remove EGR valve to manifold retaining bolts and valve.
3. Remove deposits from EGR ports by hand using a suitable drill bit and screw driver.
4. Brush small deposits down EGR port into passages, then using compressed air, blow ports clean. Solvents should not be used to clean EGR valve or passages, since damage to system may result.
5. Install EGR valve, using new gasket.
6. Install carburetor, if applicable.