Pinpoint Test G: Engine Ticking, Knocking Or Continuous Rattle
WARNING: This page is about a different car, the 2004 Ford Ranger. However, it is still accessible from the selected car via links, so may be relevant.
- G1 CHECK FOR NOISE AT THE VALVE COVERS AND THE FRONT COVERS (OHC ENGINES)
- Carry out the VEHICLE COLD SOAK PROCEDURE .
- Key in START position.
- Using an EngineEAR, listen closely at the valve covers and the front covers (OHC engines) by placing the probe near the surface of the valve cover and then on the surface front cover.
- Key in OFF position.
- Is the noise source apparent?
NOTE: For a short-duration ticking noise, multiple engine starts may be necessary.- Yes : REMOVE the appropriate cover and INSPECT for loose, worn/broken components. REPAIR as necessary. TEST the system for normal operation.
- No : GO to G2.
- G2 CHECK FOR NOISE AT THE CYLINDER BLOCK
- Key in START position.
- Using an EngineEAR, listen closely at the cylinder block by placing a probe on or near each freeze plug.
- Key in OFF position.
- Is the noise source apparent?
- Yes : REPAIR or INSTALL new components as necessary.
- No : GO to G3.
- G3 CHECK FOR NOISE WHILE DISCONNECTING EACH FUEL INJECTOR ELECTRICAL CONNECTOR, ONE AT A TIME
- Key in START position.
- Disconnect each fuel injector electrical connector, one at a time, to decrease piston force and listen for the noise.
- Key in OFF position.
- Is the noise reduced or eliminated?
- Yes : INSTALL a new fuel injector. TEST the system for normal operation.
- No : INSPECT accessory drive or the transmission as a possible source.