What to check after BANG?

Dan MD · Nov 25, 2012

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?

Thanks,
Dan

GordoSD · Nov 25, 2012

That was Old shooting at a coon.

Janicholson · Nov 25, 2012

Any loud noise that would cause engine failure is not self healing. It would still be broken. The only tractor related bang I can imagine is a small backfire into the intake. Unless you have very good reason to disassemble and engine, like continuous rapping inside, no oil pressure, coolant water in oil or oil in coolant, Leave it alone. Jim

What to check after BANG?

Dan MD

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GordoSD

Well-known Member

Janicholson

Well-known Member

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