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Home >> Buick >> 2015 >> Regal GS, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 1 (Engine Mechanical - 2.4L) >> Specifications >> Thread Repair Specifications (LEA, or LUK) >> Cylinder Head Top View

Cylinder Head Top View

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Fig 1: Locating Bolts On Cylinder Head - Top View
GM2201821Courtesy of GENERAL MOTORS COMPANY
Cylinder Head Top View

Service Call Out Thread Size Insert Drill Counterbore Tool Tap Driver Drill Depth (Maximum) Tap Depth (Maximum)
EN42385850 MM (IN) MM (IN)
1 M6 x 1 205 852 N/A 203 204 24 0.945 20 0.787
2 M6 x 1 205 201 202 203 204 20 0.787 16 0.63
3 M14 x 1.75 854 857 N/A 858 859 THRU THRU
4 M8 x 1.25 854 853 N/A 208 209 30 1.182 27 1.063