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, Cat Engine Expert
Category: Medium and Heavy Trucks
Satisfied Customers: 8958
Experience:  I am ASE Master Truck Certified.
30708357
Type Your Medium and Heavy Trucks Question Here...
Cat Man is online now
A new question is answered every 9 seconds

I have a c15 it sucks coolant out of reservoir dead after

Customer Question

I have a c15 it sucks coolant out of reservoir dead after running for about 10 minutes it pushes it back out over flow tube I have checked the precooler an its dry. The bottom radiator hose is cold towards the radiator an It Hot Toys the engine
Submitted: 1 year ago.
Category: Medium and Heavy Trucks
Expert:  Cat Man replied 1 year ago.

Thanks for asking your question. I will try and help you out.

There are several things I have seen cause this.

The first is a bad rad cap. I would test or change it first.

Second is a failed air compressor head gasket.

Third is a failed engine head gasket.

And lastly is a cracked cylinder liner.

Please reply back if you need more help or have more questions. I am happy to assist.

Customer: replied 1 year ago.
I replaced radiator cap. is it it also runs cool all the time
Customer: replied 1 year ago.
I also replace air compressor
Expert:  Cat Man replied 1 year ago.

Thanks for the information.

Unfortunately if the precooler is dry, the rad cap and air compressor have been replaced. I must suspect the head gasket or a cracked liner. It's possible it's a cracked head but that's very rare on these engines. I am sorry. I wish I had better news.

Expert:  Cat Man replied 1 year ago.

Hey. I just wanted to see how things were going. Please let me know if you need more help. I am happy to assist. If my information was helpful, please leave a good or higher rating so that I receive credit. Thanks.