When checking a diesel cylinder head for warpage, which method is correct?
-
A
Lay a straightedge on the machined surface and use a feeler gauge to measure gaps lengthwise, crosswise and diagonally
-
B
Measure the thickness of the head at the center only with a dial caliper
-
C
Press a bearing plastigage strip across the deck and measure its width
-
D
Spray the surface with dye penetrant and look for linear indications