Compression tester

[ibnxe]

rpete,
With 5000 hours and excessive black smoke under load, I would expect that you need to have the injectors checked or overhauled.
Is the engine going through more than normal amounts of oil? This would be more of a bluish smoke anyway.

 

[repete]

rpete,
With 5000 hours and excessive black smoke under load, I would expect that you need to have the injectors checked or overhauled.
Is the engine going through more than normal amounts of oil? This would be more of a bluish smoke anyway.

It uses no oil. I have changed oil and filter every 100 hours for it's life. Never overheated, hot but never close to red line. I am hopeful I do not have to remove anything beyond injectors and a compression test will help me decide.

 

[DanD78]

Have you checked your air filters? Has it lost power or just smoking black. I have changed injectors on a high hour engine before and it improved power and stopped the smoking. If you continue to run with a bad injector you could get cylinder wash and score a cylinder.

Dan

 

[repete]

Have you checked your air filters? Has it lost power or just smoking black. I have changed injectors on a high hour engine before and it improved power and stopped the smoking. If you continue to run with a bad injector you could get cylinder wash and score a cylinder.

Dan

I think I will take your lead and just get a new set of injectors and see what happens. Probably a good time to check compression while changing injectors anyway. If I do have a mechanical problem beyond injectors, I most likely will tear down and rebuild and would want to install the new injectors anyhow. Darn, $$$.