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Home >> Oldsmobile >> 1975 >> Toronado Custom >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> 260" BUICK, OLDSMOBILE & PONTIAC 350" & 455" OLDSMOBILE Exc. Omega >> Cylinder Head >> Installation

Cylinder Head: Installation

Clean all gasket surfaces and coat both sides of head gasket with suitable sealer. Install gasket on block and install cylinder heads.

NOTE: Install gasket with bead toward cylinder block on 455".

Dip cylinder head bolts in engine oil, install and tighten in two steps in sequence shown in illustration.

Fig 1: CYLINDER HEAD TIGHTENING SEQUENCE
G09333350Courtesy of GENERAL MOTORS COMPANY
VALVES

Engine & Valve Head Diam. Face Angle Seat Angle Seat Width Stem Diameter Stem Clearance Valve Lift
260"              
  Int. 1.522" 44° 45° .037-.075" .3425-.3432" .0010-.0027" .....
Exh. 1.300" 30° 31° .050-.090" .3420-.3427" .0015-.0032" .....
350"              
  Int. 1.875" 44° 45° .037-.075" .3425-.3432" .0010-.0027" .....
Exh. 1.622" 30° 31° .050-.090" .3420-.3427" .0015-.0032" .....
455"              
  Int. 1.995" 44° 45° .037-.075" .3425-.3432" .0010-.0027" .....
Exh. 1.622" 30° 31° .050-.090" .3420-.3427" .0015-.0032" .....