LEMON Manuals: Even more car manuals for everyone
Home >> Ford >> 1992 >> Crown Victoria Base, AOD >> Repair and Diagnosis >> External Pages >> Different car >> Section 4 (1.9L 4-CYL - VIN [J]) >> Removal & Installation >> Cylinder Head R & I >> Inspection

Cylinder Head R & I: Inspection

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. Check cylinder head warpage at deck surface. Resurface cylinder head if warpage exceeds specification. See CYLINDER HEAD  table in ENGINE SPECIFICATIONS at end of article.
    CAUTION: DO NOT machine more than .010" (.25 mm) from cylinder head original thickness.
  2. Check cylinder block deck surface. Resurface cylinder block if warpage exceeds specification. See CYLINDER BLOCK  table in ENGINE SPECIFICATIONS at end of article.
    CAUTION: DO NOT machine more than .010" (.25 mm) from cylinder block original thickness.
  3. Check piston squish height every time cylinder head is removed. Piston squish height is clearance between piston dome and cylinder head dome, with piston at TDC.
  4. Ensure gasket surfaces are clean. Place a small amount of SOFT lead solder on No. 1 piston spherical areas. See Fig 1. Rotate crankshaft and lower piston in cylinder bore.
    Fig 1: Installing Soft Lead Solder on Piston
    G55079Courtesy of FORD MOTOR CO.
  5. Install used head gasket. A used head gasket is preferred, as it is compressed and gives the least amount of clearance.
    CAUTION: Ensure camshaft sprocket timing mark is aligned with cylinder head timing mark to prevent valve damage. See Figure.
  6. Install cylinder head. Install USED cylinder head bolts and tighten bolts to 30-44 ft. lbs. (41-60 N.m) in sequence. Refer to Figure.
  7. Rotate crankshaft and move piston through TDC position. Remove cylinder head. Measure thickness of compressed soft lead solder to determine piston squish height at TDC. See Fig 2.
    Fig 2: Measuring Piston Squish Height
    G91D07178Courtesy of FORD MOTOR CO.
  8. Piston squish height should be .039-.070" (.99-1.78 mm). If no parts other than head gasket are replaced, piston squish height should be within specifications. If parts other than head gasket are replaced and piston squish height is not within specification, replace parts again. Recheck piston squish height.
CAUTION: DO NOT install cylinder head without performing piston squish height. See INSPECTION under CYLINDER HEAD R & I  in this article. DO NOT reuse cylinder head bolts. Ensure bolt holes in cylinder head are clean.
scientia non olet · About LEMON Manuals