Posted by pete 23 on March 30, 2011 at 10:27:56 from (74.44.100.190):
In Reply to: 560 Diesel noise posted by BeekeeperArt in MN on March 30, 2011 at 04:43:47:
On a rotary injection pump like the Roosa Master,a leaking injection nozzle can cause the next cyl in firing order to get short changed for fuel and either one or both of them may knock. What I do when looking for a leaking, sticky nozzle is take off all lines at the nozzle and crank it over with starter and watch the nozzle. If you have a leaker it will push fuel out of that particular nozzle. One of those quick and easy checks I learned that is not found in any books. And yes, a leaky nozzle will make that engine knock like it is flying apart. If you have a piston problem, you should notice a puff in the crankcase breather. Valve, or valve seat, you should hear in exhaust. I wind them up a bit and shut off to allow engine to coast a little and listen to intake and exhaust.
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