Quantcast Do not rotate crankshaft with cylinder head removed

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ARMY TM 9-2815-260-24 AIR FORCE TO 38G1-126-2 MARINE CORPS TM 09244A/09245A-24 4-74 (13) Remove rocker arm assembly and push rods, refer to paragraph 4.7.3. (14) If a blown head gasket (12, Figure 4-49) is suspected, check and record torque on each capscrew (1) on cylinder head (14) before removing as follows: (a) Make a reference mark (in-line) on head of capscrew (1) (or socket) and cylinder head surface. (b) Loosen capscrew at least ½ turn, then retighten capscrew (using a torque wrench) until reference marks align and record torque. (c) If capscrews are not tightened to 110 lb-ft (150Nm), retorque to 110 lb-ft (150Nm) per step g. and retest engine. (15) Remove all cylinder head capscrews (1). CAUTION Do not use screwdrivers or pry bars between cylinder block and cylinder head to loosen cylinder head gasket seal.  Screwdrivers or pry bars can damage cylinder head and cylinder block gasket surfaces. CAUTION Do not rotate crankshaft with cylinder head removed unless cylinder liners are secured with cap screws and large flat washers, refer to paragraph 5.4.5. (16) Using adequate lifting device, lift cylinder head (14) from cylinder block.  If cylinder head sticks, use a soft hammer to tap cylinder head. (17) Remove cylinder head gasket (12).  Inspect cylinder head gasket for possible oil, coolant, or combustion chamber leaks.  Discard cylinder head gasket.


 


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