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Old 06-20-2014, 09:24 AM Fanatic

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Inspected the truck today

Im hearing a noise that sounds like the truck is sucking or blowing air. Im thinking its a up pipe leak or loose boot but cant find any obvious leaks. I got on it while on the road to see if i can get some soot around the pipes but nothing. What i did find is i have what looks like soot and oil mixed building around the intercooler boots. I have not done a CCV mod but its on the list (trying to find a way to make it cheap and also be able to route it back to the intake). Also I have a heavy build up of oil where brake fluid fill is mounted. Any one know where it could be coming from it doesnt look fresh but not old either. And I noticed I had a loose bar in the steering so i started looking at the bushings and almost every piece of rubber under there is showing signs of wear or is falling apart/cracked. and i couldnt find any nipples to grease anything, whats up with that?
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Old 06-23-2014, 03:24 PM
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I made my ccv mod for under $100.00.......Some 3/4" heater hose, I think 2" abs pipe(have to go look to make sure), couple abs end caps, couple 3/4" threaded hose adaptors and 6 scotch bright pretty good to.
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Old 06-23-2014, 05:03 PM
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The 6.4 shouldn't need a CCV mod. The oil fill canister should catch most of the oil and return it to the crankcase via the small hose coming out the front and running down the engine to the side of the block by the crank sensor. If you are getting excessive oil in the intake ducts that could indicate a problem, blown turbo seals or excessive crankcase pressure (or both).

You really have to be careful that your CCV mod is not restrictive at all. If you allow crankcase pressure to build it will eventually cause problems with your turbos. Your turbo drains are basically subject to any crankcase pressure.

I would be extremely inclined to leave the system alone. Ported vacuum from the intake duct is helping evacuate your crankcase and it promotes good sealing of the rings/seals too.

EDIT - usually a hissing noise on a 6.4 is a split up-pipe. Most of the times it is the RH up-pipe flex joint. Soot or blackness on your firewall is a good indicator.
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