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Home >> Chevrolet >> 2018 >> Spark LT, Automatic CVT Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 78 (Engine Mechanical - 1.4L (LV7) - Repair Instructions - Off Vehicle) >> Repair Instructions - Off Vehicle >> Cylinder Head Disassemble (Europe) >> Engine Oil Manifold Check Valve Removal

Engine Oil Manifold Check Valve Removal

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  1. Inspect the oil manifold check valves. Damaged, restricted or clogged check valves must be replaced. If check valves are OK, disregard the remaining steps which detail replacing the check valves.
    2. Fig 1: Oil Manifold Check Valve, Check Ball Spring And Check Ball
    GM4064791Courtesy of GENERAL MOTORS COMPANY
  2. Insert a punch or drift into the check valve. With moderate pressure, seat the punch into the inner body of the check valve, and remove the upper part of the valve (1).
  3. Remove the check ball spring (2) and check ball (3) from inside of the check valve.
    4. Fig 2: Setting Depth Gauge On Drill Bit
    GM4064793Courtesy of GENERAL MOTORS COMPANY
  4. Using EN-46122-3  drill bit (1), drill the remainder of check valve sleeve to a depth of approximately 19 mm (0.75 in) (a) by placing tape on drill bit as a depth gauge. It is not necessary or desirable to drill completely through the bottom of the check valve.
    5. Fig 3: Tapping Drilled Out Portion Of Oil Manifold Check Valve
    GM4064795Courtesy of GENERAL MOTORS COMPANY
  5. Lubricate EN-46122-4  tap (1) with lubricant. Tap drilled out portion of check valve remaining in cylinder head. Tap to full depth possible until tap bottoms out in head.
    6. Fig 4: Special Tool To Remove Oil Manifold Check Valve Sleeve From Cylinder Head
    GM4064798Courtesy of GENERAL MOTORS COMPANY
  6. Assemble EN-46122-2  bolt, nut, washers, and collar (1). Position collar with slightly-larger inside diameter DOWN toward the cylinder head.
  7. Screw bolt by hand fully down into threaded check valve sleeve, then lightly tighten nut against washer.
  8. Hold bolt with one wrench, and use another to tighten the nut until the check valve sleeve is removed from the cylinder head.
  9. Clean check valve bore and related passages thoroughly to remove any drilling chips or other debris.
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