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Home >> Mercury >> 1965 >> Caliente 4.7L Eng VIN D >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> 221", 260", 289" V8 Engines >> Engine Notes >> Valve Spring Installed Height

Valve Spring Installed Height

Installed height of valve spring must not exceed specifications listed in table below. Measure height from surface of cylinder head spring pad to underside of spring retainer. If height greater than specified, install.030" spacer on head under spring to bring height within limits.

CAUTION: Install spacers only if necessary and do not use more than 2 spacers (will overstress spring and overload camshaft lobes).
Valve Spring Installed Height Specifications

Engine Installed Height
1966-66 All Models 1 3/4"-1 25/32"
1967-68 289" (Exc. Hi-Perf.) 1 5/8"-1 11/16"
  289" (Hi-Perf.) 1 3/4"-1 25/32"
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