TM 5-3805-262-203-30. ENGINE TROUBLESHOOTING (CONT)MALFUNCTIONTEST OR INSPECTIONCORRECTIVE ACTION5. ENGINE MISFIRES (Cont).Step 3.Operate engine for 15 minutes at idleUnlock radiator cap access panel.R e m o v e r a d i a t o r c a p s l o w l y t o r e l i e v epressure before completely removing whene n g i n e i s h o t , F a i l u r e t o d o s o c o u ldc a u s e s e v e r e b u r n s d u e t o h o t s t e a mscalding you.I f y o u a r e s c a l d e d b y h otsteam, seek medical aid immediately.Carefully remove radiator cap, andmeasure coolant temperature using athermometer (be sure thermometer doesnot touch any metal parts of radia-tor) .Coolant temperature must be between175 to 202 degrees F.speed to warm coolant.a. If coolant temperature is not between 175 to 202 degrees F,remove and test thermostat (page 4-87).b. If coolant temperature is between 175 to 202 degrees F, rein-stall radiator cap, close radiator cap access panel, and go tostep 4 below.Step 4.While assistant cranks engineusing ignition key switch,check for fuel leaks at fueli n j e c t o r l i n e s.a , I f f u e l l e a k s a r e s e e n ,t i g h t e n f u e l l i n e s . Iftightening does no good,notify next higher mainte-n a n c e l e v e l ( f u e l i n j e c t o rlines must be replaced).b . I f f u e l l e a k s a r e n otseen, go to step 5 below.3-223
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