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adamis's avatar
adamis
Nomad II
Jul 28, 2017

Dryer Vent Tubing for Intake Tubing

I avoided a near disaster on my most recent trip to Lake Tahoe climbing over the pass on highway 50 that I thought I would share with you all...

To start, I purchased my 7.3 F350 about two years ago from a guy who used it to pull a race car in a 32ft gooseneck trailer. He was the engine builder of the car and he also invested lots of time into the truck adding various after market parts and "tweaks". This being my first truck, looking under the hood revealed nothing special to me other than a somewhat dusty engine bay. I've driven approximately 15,000 miles since the purchase with no major problems.

When coming over the pass to Lake Tahoe, I noticed that the truck sounded strangely different than I was used to. It wasn't a huge difference but something just enough to make me wonder. I safely made it to camp and didn't think about it again until we decided to drive into town and I noticed the same odd sound. I opened the hood and found that the intake tubing going from the air filter to the turbo housing had come part.

What I realized is that the previous owner had attempted to move the air filter farther forward to get some "fresher" air and used what appears to be a vinyl dryer vent tubing (with the spiral wire running through it) to do the job. The glue that kept the vinyl wrapped had come apart in the heat and the thing had completely opened up. Where I got lucky is that a portion of the vinyl had actually started being sucked into the turbo. When I pulled it out, there were frayed edges where it appears the turbo had been nicking it. When I realized what was going on, I removed all of the tubing and had to jerry rig the air filter directly to the turbo housing (to be fixed later with proper tubing).

I was fortunate this time that the previous owner's cheap trick didn't cost me an engine.

28 Replies

  • So-called "cold air filters" are most of the time hot air setups, that suck the air from engine bay, instead of factory inlet at front grille.
    How did such modification passed smog test?
    I wonder what else will come down the road?
    If you will heave to buy new filter, go for OEM severe duty one. Those can absorb several lb of dust and still work fine.
  • When buying used use a very sharp eye and believe nothing unless proven. A diesel engine needs to be tight and right nothing molested is a good sign.
  • Thanks Wayne, I've been doing some research on what to replace with and it seems like there are quite a few options to consider. Current top option looks to be the Tymar filter / intake setup that seems to be popular. A little pricey for me at the moment but I think it will be a winter project when the funds and time roll in.

    In regards to the other mods, Everything else seems to be okay but I am taking a closer look.
  • Wow! I think I'd buy a cold air intake that uses the Donaldson filter because it is likely the same price as putting it back to stock.
  • That was a near miss!

    The intake tube should be a rigid plastic tube and provides for the crank case vent to spray any oil into the turbo intake. Some have made a separate vent for it, but it must NOT be blocked off.

    I'm talking about the "dogbox" vent on top of the drivers side valve cover.
  • The first thing it would have done is wipe out the impeller on the intake side of the turbo and possibly break the turbo impeller shaft. Pieces of the impeller probably would have gone into the inter cooler. Probably would not have made it to the engine, but possible. I suggest going to the Ford Forms to see what others are using for the tubing.

    Wayne
  • Previous owner was a hack mechanic. I wouldn't have wanted to be on the same race track as him with $0.02 mods waiting for a disaster.

    I'd be looking at ALL of the mods that this guy did on the truck as you now know the kind of work he does. You had a "near miss" with the turbo but that was just a warning shot over the bow for you. Seriously look at ALL of the mods (suspension, engine, transmission, etc.) for proper installation, proper hardware, etc. The next failure may not treat you so kindly.