Medium and Heavy Trucks
Have Truck Repair Questions? Ask an Expert
Thanks for asking your question. I will try and help you out.
There are three ways fuel can enter the oil.
The first and most common is a leak at an injector. Which you have already replaced.
Second is a leaking shaft seal on the fuel transfer pump. I would change this next.
And lastly is a cracked head. Cracked heads that cause fuel to enter the oil are very rare. I've only seen it once in all my years.
Please reply back if you need more help or have more questions. I am happy to assist.
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