How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Cat Man Your Own Question
Cat Man
Cat Man, Caterpillar Engine Expert
Category: Heavy Equipment
Satisfied Customers: 8912
Experience:  23 Years Caterpillar Engine experience.
Type Your Heavy Equipment Question Here...
Cat Man is online now
A new question is answered every 9 seconds

I have a 2006 C7 acert. today i noticed antifreez jug way

Customer Question

I have a 2006 C7 acert. today i noticed antifreez jug way over full and top half looks like orange milk, bottom looks like antifreeze. oil pressure seems ok, and looks normal. runs fine. i have some in a clear jug seperating and apears to maybe be oil. any idea?
JA: What is the complete model and serial number of your machine?
Customer: mm1060429 1FVACWOCO7HX17663
JA: Anything else you want the equipment mechanic to know before I connect you?
Customer: i THINK thats all. fuel looks ok. everything seems ok. except the top the antifreez jug fill up with orange creamer. less than half gallon
Submitted: 11 months ago.
Category: Heavy Equipment
Expert:  Cat Man replied 11 months ago.
Thanks for asking your question. I will try and help you out.
Unfortunately I have seen this many times. What you are seeing is diesel fuel. This is what happens when the injector cup o rings fail. Fuel will enter the cooling system. It does this because the fuel pressure is much higher than cooling system pressure.
To repair, you will need to remove and replace the injector cups and o rings.I am sorry. I wish I had better news.Please reply back if you need more help or have more questions. I am happy to assist.