Case 450 Crawler dozer wont start...I'm stumped

[Walkman75]

That's one of three things, Too slow cranking speed, too cold for the engine to start without intake heater help, or a tired engine with low compression. Will it start with a SMALL whiff of ether? White exhaust smoke means fuel is getting into the cylinders but there's not enough heat to fire the fuel off.

It will fire for just a second with a whiff of ether then just dies. I think my next step is pulling the head and seeing if there is anything noticeable.

 

[Dieseltech]

It will fire for just a second with a whiff of ether then just dies. I think my next step is pulling the head and seeing if there is anything noticeable.

I'd do a compression test first before pulling the head. Also try giving more light ether shots after it starts to keep it running. You said it started OK at 70 degrees, if engine is tired it won't start the same at 50 degrees without some intake heat help or small ether shots.

 

[John Saeli]

It will fire for just a second with a whiff of ether then just dies. I think my next step is pulling the head and seeing if there is anything noticeable.

I wouldn't be pulling the head until you get this fuel problem fixed. Mist at the injectors instead of a stream. Fix that problem 1st.

 

[Fritz Maurer]

I don't see why all of a sudden the injectors are the problem. The pattern may or may not be correct, but it was already running.

The spray pattern is phrased by the OP as , " would describe them as..." which could mean anything. As long as they're out they might as well be bench tested, but the fact remains it was already running and all he did was do some non-engine related repairs.

When he bought it, it "started right away ", even with those crappy injectors.

Unless the injectors all suddenly went bad because he changed a hose.

There is more to this no-start story that hasn't been mentioned.

 

[Walkman75]

I don't see why all of a sudden the injectors are the problem. The pattern may or may not be correct, but it was already running.

The spray pattern is phrased by the OP as , " would describe them as..." which could mean anything. As long as they're out they might as well be bench tested, but the fact remains it was already running and all he did was do some non-engine related repairs.

When he bought it, it "started right away ", even with those crappy injectors.

Unless the injectors all suddenly went bad because he changed a hose.

There is more to this no-start story that hasn't .

 

[Walkman75]

Took the injection pump top off and it was full of dirt/sludge/crap so it's headed to get rebuilt.

 

[Valdfur]

About 2 weeks ago I picked up a case 450 dozer SN 3050945 188 engine. When I bought it, we fired it up and it started right away and ran for about 45 seconds and I noticed a hydraulic leak so we shut it down, It has a driveline issue so he loaded it on my trailer via a forklift. Got it home and unloaded, swapped out the leaking hydraulic hoses and a couple other things but nothing related to the engine. 2 days ago checked the oil, checked for plenty of fuel in the tank, both the fuel feeder and return line valves are open, blew air through both lines to be sure they weren't clogged, swapped fuel filters and bled the system by breaking injectors loose and looking for fuel, everything looked good. Cant get it to start, turning over fast enough, checked valves, took top off injector pump to be sure the cutoff was all the way open, took each injector out and verified they were pushing fuel by hooking them up outside the cylinders, all 4 had good streams of fuel, all cylinders seemed to be pushing good air but I don't have a way to test compression on this thing since the injectors aren't threaded. It will fire for just a couple of seconds if I hit it with about .5 sec of ether. Any ideas are welcome.

Sounds like it's getting fuel and has compression, have you checked the air filter/pipes and intake manifold for blockages?