Sick B7100 white smoke no power help diagnose

[garyh]

B7100D 4WD 3 cyl. mid 1960's hour meter has never worked

All of a sudden white smoke pouring out of exhaust and immediate loss of power like now only running at 20% of original power. Smoke does not smell like antifreeze, smoke is not pure white more of a dirty white but not dark like oil/diesel burning. Starts good and runs smooth.

What I have done to date with no luck. Fresh fuel, sea foam additive, replaced fuel filter, fuel lines, fuel pump, had injectors rebuilt. Replaced head gasket adjusted valves.

What would you do next? What other questions can I answer for you? FYI: I have not had the fuel injector pump rebuilt or replaced the rings.

Before this happened it ran perfect, with only a little dark smoke that seemed normal for a diesel. Plenty of power and ran smooth. By the way I have owned this tractor for 30 years and the only other problem I have had was to rebuild the starter motor.

 

[North Idaho Wolfman]

It's a 1976+ not 1960's.

You most likely have a bad injector.
White smoke is unburnt fuel, a lot of it!
How long ago did you have the injectors rebuilt?

Or water being introduced.
Has the radiator been staying full?

Or could be an air restriction?
Check the Air Filter.

If none of that, do a compression test.

 

[Jim L.]

Welcome to the forum.

Adding to Wolfman's advice, white smoke and unburnt fuel could be because of lack of heat of compression. Compression test results would help narrow things down.

When you replaced the head gasket did everything look normal?

 

[garyh]

around the piston closest to the dashboard was a little damp. Fuel injectors were rebuilt by pro shop recently. I was not loosing coolant. I need to figure out how I can do a compression test.

 

[AllDodge]

Remove the injectors, then get an adapter to screw into the holes and attach gauge. The hardest part is getting the correctly threaded adapter but may be able to borrow/loan one

 

[North Idaho Wolfman]

Go to Harbor freight and get a Diesel compression tester.

When you run it, is one exhaust outlet colder than the rest?
That will at least tell you which cylinder it's happening on.

When you put the rebuilt injectors in did you use new sealing washers on the injectors?
Did you make sure to remove the old ones?

You can do a simple bubble test, use some diesel around the injectors to check for a leak of that sealing washer.

If you find one dead cylinder swap the injector with a different cylinder, Bleed, run and see if the problem moves with the injector, if it does it's a bad injector.

 

[garyh]

The old washers came out with the fuel injector and new washers were installed. After replacing head gasket I am now getting fuel leakage around the injector lines leaving the pump so I will get new o-rings to stop that. I am also getting leakage where the fuel lines that screw into the top of the injectors. What is the best way to stop that. I did not see any o-rings for FI end. I definitely need to get this cleared up before further testing.

 

[North Idaho Wolfman]

The old washers came out with the fuel injector and new washers were installed. After replacing head gasket I am now getting fuel leakage around the injector lines leaving the pump so I will get new o-rings to stop that. I am also getting leakage where the fuel lines that screw into the top of the injectors. What is the best way to stop that. I did not see any o-rings for FI end. I definitely need to get this cleared up before further testing.

The Fuel injector side of the line is just a taper fit, no seals, use NO sealer of any kind, you just have to tighten them, make sure they are 100% clean!

On the Injection pump side it sounds like you lossend the delivery valves.

Both of these could be the source of your problems, as if your not getting proper pressure and flow to the injectors, your not going to get the injectors to pop properly.

 

[North Idaho Wolfman]

All of a sudden white smoke pouring out of exhaust and immediate loss of power like now only running at 20% of original power.

I reread what you wrote.

You either had a injector fail (like a broken spring inside).
You broke rings or piston lands (lost compression).
Or you have contaminated fuel, water or gasoline in the fuel.

 

[trigglatour]

I am having a similar issue.

I have a B7100-HST that sat neglected for around 5 years. When I received it, I flushed the fuel system, cleaned the fuel tank and replaced the battery, fuel filter, oil, and hydraulic oil. Once these items were taken care of, the tractor seemed to be running well, though I did not put any significant time on it.

This is my first year to really put it to the test. I'm using it to mow a 1 acre lot.

One day after taking a short break from mowing, I started up the tractor and large amounts of white smoke began pouring from the exhaust pipe. I noticed a slight decrease in power - probably in the neighborhood of 20% reduced (80% power). I stopped mid-mow for fear of damaging the machine.

One week later I went to investigate, and could not reproduce the problem. (So I finished mowing my lot)

One week after that, I started the tractor and the same white smoke poured from the exhaust pipe. I turned off the engine, and restarted it. No smoke, tractor ran well.

This week, the smoke persists, and I accepted the fact that I have a legitimate issue.

After looking over this thread, I decided to investigate the possibility of a leaking injector. Upon opening the engine housing, I found liquid covering the top of the engine (see images). I believe the liquid is diesel. I cannot tell if the liquid is leaking from the injectors or the engine casing.

Would fuel leaking from the casing cause my issue?
What problem does fuel leaking from the casing indicate?
Any thoughts on how I should proceed?

A little background on myself, I'm new to forums, engines, and mechanical machines.