TM-9-2320-387-24 HMMWV Direct Support & General Support Maintenance Manual Volume 1 Download
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REFERENCE INFORMATION 0 II . . WARNING i Be careful when performing this test. Exhaust gas can be extremely hot and severe burns can result. Put a piece of paper in the exhaust stream for a few moments with the engine at idle. Then look at the paper to see if there is any condensed fuel on it. Then smell the paper to see if it smells like raw fuel. If it smells like fuel, the engine could be very cold or else it has a DS level fuel system fault or compression fault. -._ -I White smoke for a short time after start-up, especially on a cold day, is a normal condition. It is caused by incomplete combustion of the fuel because of low cylinder temperature. It should clear up in a few minutes. If not, you may have a bad head gasket, cracked block, or a restricted check valve. Check for 1 restricted check valve (para. 3-36). TM 9-2320-387-24-l FUEL SYSTEM 2-127