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Cat Man
Cat Man, Cat Engine Expert
Category: Construction and Road Equipment
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Experience:  I am ASE Master Certified.
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I have a 1996 ford l 9000 with cat 3306 coolant leaks out

Customer Question

I have a 1996 ford l 9000 with cat 3306 coolant leaks out the overflow tube only while driving sitting still its runs fine no leaks while loaded going uphill my tempature starts to rise it goes down when im not loaded
Submitted: 1 year ago.
Category: Construction and Road Equipment
Expert:  Cat Man replied 1 year ago.

Thanks for asking your question. I can help you with this.

There are three things I have seen cause this.
The first is a faulty radiator cap. Which you have already replaced.
Second is a leaking head gasket or cracked cylinder liner.
And Lastly is a cracked jacket water precooler. It sits on top of the intake ports. If it is cracked, it will also leak coolant down in one of the cylinders. To confirm you can remove the cooler and look for a white residue. If you see white residue, the jacket water cooler is cracked. If you do not, I would suspect the head gasket or a cracked cylinder liner.

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

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.

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