1800 Diesel woes

agonair

Member
1800 Series B Diesel

I was driving the tractor on Friday. No load about 1500 rpm. It was running very good. All of a sudden, it cough, gray smoke (not steady) puffs, sputtered, then gray smoke ( smells like unburned wet diesel)...started running rough and black liquid oozing out of #2 cylinder exhaust port.

We spent a fortune on this last fall. Head was cracked we had it repaired. New valves. New injector tips.

Thoughts?
 
How's the blow by? Hole in a piston would kick out enough smoke from the blow by tube to eliminate all the mosquitoes within a mile. If it had a hole,it wouldn't be making compression to burn the fuel.
 
A valve would prevent combustion and cause unburned fuel too wouldn't it? There wouldn't be any blow by with that. Other than that,an injector tip would be my only other idea.
 
Take the exhaust manifold off and verify that it is #2 cylinder where the unburned fuel is coming from. Remove the injector and do one of 2 things. swap it with one from another cylinder. Does the unburned fuel stay with the injector or the cylinder? If you have quick access to a nozzle tester check it. If the injector tests good then you have a problem with the cylinder. If that is the problem hinge the tank and remove the valve cover and start checking. Questions. Send me an e-mail, Could be as simple as valve adjustment or a push rod that jumped out of place. J.
 

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