Ford Motor Co. Tech Solution Guide

Main Bearing Housing Bore Caution For 1993- 2002 Ford/Mazda 2.5L VIN B & KL Engines
The AERA Technical Committee says there may be some confusion about how to properly determine the main bearing bore diameter on 1993-2002 Ford 2.5L VIN B and KL engines. This engine is made by Mazda and used in the Probe and 626 car models. It appears some previously published information may have been inaccurate. Many service specifications have listed a housing bore diameter .002˝ smaller than it should be.
While the amount of inaccuracy may seem minimal, if the diameter is used, it will provide insufficient main bearing oil clearance. The correct main bearing housing bore size for the 2.5L engines listed above should actually be 2.6378˝- 2.6384˝ (67.000-67.016 mm). Desired main bearing oil clearance is listed as .0015˝-.0022˝ (.038-.056 mm).
Engine Ticking Noise On 2001-2006 Ford 3.0L VIN S Engines
If you have received questions or complaints about a ticking noise in certain Ford 3.0L engines, you’re not alone. Some 2001-2005 Taurus/Sable, 2001-2006 Escape and 2005-2006 Mariner vehicles built prior to 1-17-2006 and equipped with the 3.0L 4V Duratec engine may exhibit a ticking noise from the left bank cylinder head, only when the engine is at nor- mal operating temperature. The ticking noise may be coming from the left hand intake camshaft at cylinder No. 6. Your installer customers can easily diagnose this condition, with the engine running at normal operating temperature, using a mechanic’s stethoscope (Figure 1 left). If the ticking noise can be verified at those locations, refer to this service procedure.
1) Remove the left bank valve cover.
2) Rotate the engine clockwise until the cylinder number 6 intake cam lobes are pointing up and the valves are fully closed.

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