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Home >> Ford >> 1992 >> Crown Victoria Base, AOD >> Repair and Diagnosis >> External Pages >> Different car >> Section 4 (1.9L 4-CYL - VIN [J]) >> Overhaul >> Valve Guides

Valve Guides

WARNING: This page is about a different car, the 1992 Mercury Tracer, 1992 Ford Escort, 1991 Mercury Tracer, and 1991 Ford Escort. However, it is still accessible from the selected car via links, so may be relevant.
  1. Valve guides must be reamed for oversize valves if stem-to-guide oil clearance exceeds specification. See CYLINDER HEAD  table in ENGINE SPECIFICATIONS at end of article. Valves are available in .015" (.38 mm) and .030" (.76 mm) oversize.
  2. Valve guides may also be bored out and replaced with a service guide if oversized valves are not available or guide is damaged. Ream valve guides until proper stem-to-guide clearance exists.
NOTE: DO NOT ream valve guides from standard to maximum oversize in one step. Ream valve guides to oversize in gradual steps, so valve guides are reamed in relation to valve seat. Valve seats must be ground when valve guide is reamed or replaced.
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