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James, Ford Technician
Category: Ford
Satisfied Customers: 3545
Experience:  Ford Senior Master Tech, Ford gas and diesel expert, ASE Certified
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I have a 06 6.0. I am doing an air test of the Hpop system.

Customer Question

I have a 06 6.0. I am doing an air test of the Hpop system. Should it hold air with no leaks
JA: How old are the hoses? And what driving conditions do you most often encounter?
Customer: I have just replace the hpop fittings and dummy plugs and stand pipes with the updated seals. but when I air test i still hear air in the crank case
JA: What is the model of your '06 Ford?
Customer: f350 superduty crew
JA: Are you fixing your F350 yourself? What have you tried so far?
Customer: yes I just told you
JA: Anything else you want the mechanic to know before I connect you?
Customer: no
Submitted: 1 month ago.
Category: Ford
Expert:  James replied 1 month ago.

Hello, the air test will have a slight leak on the back of the high pressure oil pump gear. That is normal and should be very hard to hear unless the high pressure pump cover is off.