Posted by Dan MD on November 25, 2012 at 06:31:18 from (184.158.3.213):
So I have a SMD that has less than 50 hours on it since a complete rebuild. I have been sorting out some injection pump issues and was running a test the other day. I had the fuel injection lines plumbed into bottles and was running it on gas, looking for fuel delivery variations. After running about 5 minutes on gas, I heard a very loud bang from what sounded like the engine opposite from where I was standing by the inj. pump. This BANG never effected the engine as I ran it another 2 minutes finishing my test. I"m not even sure it wasn"t something falling over in the garage, but I didn"t find any culprits.
What should I be checking? I did a compression test after this happened and everything looked good there. The starter rolls the motor over evenly. Should I be dropping the pan and valve covers or is it unlikely the BANG was the tractor since it still ran fine afterwards?
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