Hey,
Got a 583K pipelayer with a D342 engine in it. It has a mis and so far haven’t figured out why. Pulled the nozzles on cylinders 1,2&6 because they were the coldest 3 exhaust temps as shot with a temperature gun on the manifold. Put in 3 known good nozzles and no change. Engine still has a stumble/stutter to it. At one point #1 was 100C cooler than #5, which was 270C after driving it a bit. The other 2 are 30-40C cooler.
Maybe 2&6 aren’t an issue, but pretty sure #1 is having some greif.
Without getting to far into this ridiculous long story, this engine was “procured” in a machine that was bought for parts, but was fully functional at time of purchase. I found the fuel system primer pump full of brown rusty looking “schmoo”
Filter bowl didn’t have a screen installed and was also full of said “schmoo”. Fuel filters were a bit better but by no means did their contents look like clean diesel fuel. When I first fired it up and was cracking fuel lines, #1 let out some of the infamous “schmoo”, then quickly cleared up to clean fuel, but obviously the crap made it through out the entire system.
So now Im wondering what to do next. Today, i got a boroscope in the cylinder on #1, and its not looking so awesome. Definitely had rust going on in there and there is little to no x hatch. Could compression be low enough to not fire the cylinder? One would think blow by would be through the roof if that was the case, which I guess I didn’t look that closely at but didn’t see obvious smoke or oil vapour billowing from that area.
How can I confirm its a fuel issue or a compression issue or what?
Should I try and make a compression tester adapter and get a reading of that cylinder’s compression?
When I loosen the fuel line on the nozzle, fuel is squirting all over, but doesn’t seem to make a big difference in sound.
Any help is greatly appreciated.
Got a 583K pipelayer with a D342 engine in it. It has a mis and so far haven’t figured out why. Pulled the nozzles on cylinders 1,2&6 because they were the coldest 3 exhaust temps as shot with a temperature gun on the manifold. Put in 3 known good nozzles and no change. Engine still has a stumble/stutter to it. At one point #1 was 100C cooler than #5, which was 270C after driving it a bit. The other 2 are 30-40C cooler.
Maybe 2&6 aren’t an issue, but pretty sure #1 is having some greif.
Without getting to far into this ridiculous long story, this engine was “procured” in a machine that was bought for parts, but was fully functional at time of purchase. I found the fuel system primer pump full of brown rusty looking “schmoo”
Filter bowl didn’t have a screen installed and was also full of said “schmoo”. Fuel filters were a bit better but by no means did their contents look like clean diesel fuel. When I first fired it up and was cracking fuel lines, #1 let out some of the infamous “schmoo”, then quickly cleared up to clean fuel, but obviously the crap made it through out the entire system.
So now Im wondering what to do next. Today, i got a boroscope in the cylinder on #1, and its not looking so awesome. Definitely had rust going on in there and there is little to no x hatch. Could compression be low enough to not fire the cylinder? One would think blow by would be through the roof if that was the case, which I guess I didn’t look that closely at but didn’t see obvious smoke or oil vapour billowing from that area.
How can I confirm its a fuel issue or a compression issue or what?
Should I try and make a compression tester adapter and get a reading of that cylinder’s compression?
When I loosen the fuel line on the nozzle, fuel is squirting all over, but doesn’t seem to make a big difference in sound.
Any help is greatly appreciated.
