Hi. Thanks for using JA! I will try and help you out.
I must say I have not ever seen an engine lose an injector 5 times. That is very odd.
When the injector failed, did the engine have a dead miss on #6 cylinder?
Thanks for the information.
If the engine is loosing it's prime, I would suspect the fuel is leaking down out of the engine. The main thing that causes this is a faulty fuel pressure regulator, I have seen this before. The regulator is located underneath the secondary fuel filter housing. I have replaced many of these for this problem. If the regulator is OK, the fuel transfer pump can cause the fuel to leak down out of the engine.
Please let me know if you need more help.
I see. Thanks for the information.
From what you are telling me, you are correct. It is definitely an injector problem. If you cut out the cylinder and the smoke went away, it is definitely the problem.
I have had problems like this with reman injectors. I can't say I have had this many on one engine, but I have had a few on an engine. To be honest, I would want to try a new injector first before the head. I can not see how a head can cause an injector to fail like this. I would suspect reman injectors as the problem.
Let me know if you need more help or have more questions.
Thanks for the update.
I am glad you found the problem.
Actually, there is enough coolant around the injector to keep it cool. The temp should remain around the operating temp of the engine.
I am not sure if the head can be repaired. I would contact a machine shop and have them take a look at it.