TM 5-4310-386-14
5-40. Cylinder Head Assembly (Cont).
(4)
Preload head bolts to 21 ft. pounds (30 Nm).
(5) Tighten head bolts (3) through one stage (45°) using socket wrench and torquing device.
(6)
Rotate crankshaft by one revolution (360 degrees).
(7)
Remove head bolts (3) and cylinder head (1). Mark cylinder heads relative to cylinders if both cylinder
heads were removed.
(8)
Remove wire from top of piston and measure at the weakest (most compressed) point.
(9)
Piston crown clearance should be .03937 to .04724 inches (1.0 to 1.2 mm).
(10)
If clearance is too large, raise cylinder, and remove shims as needed to obtain proper clearance (para. 5-
42).
(11)
If clearance is too small, remove cylinder (refer to para. 5-42), place number of shims required below
cylinder and replace cylinder.
b.
Replace. (figure 5-59)
(1)
Install cap (1) on fuel injector intakes and plugs in fuel injector pump bore studs where injector lines were
removed.
(2)
Place plugs in fuel injector overflow bores were overflow lines were removed.
(3)
Using socket wrench and square-recessed socket, remove two brass screwplugs (2) and gaskets (3).
(4)
Remove four head bolts (4) and washers (5).
(5)
Remove cylinder head (6) and gasket (7).
(6)
Checking/adjust piston crown clearance (para. a. above).
(7)
Install gasket (7) and cylinder head (6) on cylinder (8).
(8)
Install four washers (5) and bolts (4) and slightly tighten.
(9) Align induction and exhaust flanges of cylinder heads without disturbing alignment of cylinders.
(10)
Preload head bolts to 21 ft. pounds (30 Nm).
(11)
Tighten head bolts through stage one (45°), stage two (45°), stage three (45°) and stage four (30°)
(12)
Install gaskets (3) and brass screwplugs (2) into cylinder head (6).
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