Symptoms of Leaking Boots on Intercooler Tubes or Intake to Heads - Diesel Forum - TheDieselStop.com
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99 & up 7.3L Power Stroke Engine and Drivetrain Discussion of the 99 & up 7.3L Power Stroke diesel engine and drivetrain in the 1999-Up Super Duty trucks and Excursions. No gas engine discussion allowed except on transmissions and drivetrain that pertain to all models. Please confine discussion of topics in this forum to those items that are specific to the 7.3L Power Stroke engine.

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Old 08-14-2007, 10:53 AM   #1 (permalink)
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Symptoms of Leaking Boots on Intercooler Tubes or Intake to Heads

Guys,

What are some symptoms of leaking boots on the intercooler pipes or intake to the heads?

Are they as prone to leaking as some diesel performance companies say?

I have an oil residue that keeps persisting even after I try to tighten the clamps on the motor. Also, wondering if I would have any added noise from the leaking boots.

Brian
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Old 08-14-2007, 11:44 AM   #2 (permalink)
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Re: Symptoms of Leaking Boots on Intercooler Tubes or Intake to Heads

Bob Riley ( www.dieselsite.com ) sells a leak tester that can find leaky boots in short order. The oil residue is from the crankcase ventilation system. The symptoms would be low boost and higher egts with more smoke at throttle. In the worst case scenario, a boot comes off and you have zero boost and low power with copious black sooty exhaust smoke. Be careful gratuitously tightening those clamps. They are constant torque and you can overtighten them, crushing the air intake manifolds which are just stamped metal. Similarly, the OEM CAC is metal reinforced plastic. You probably would not hurt the cast metal spider.
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Old 08-14-2007, 12:35 PM   #3 (permalink)
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Re: Symptoms of Leaking Boots on Intercooler Tubes or Intake to Heads

So the oil residue is normal? I have some that appears to be sprayed up on the side of my AFE Stage II battery braket/wall in between the HOT IC Pipe and the battery.

Well, I will have to see if I crushed anything. I did not use a torque wrench but just used a 3/8 rachet.

Would I have some excessive noise coming from the motor? When I press the pedal I have an moaning sound coming from the motor which I thought (coupled with the residue) that I had some sort of leak in one of the boots.

The IC pipe on the driver side has started to rattle against the motor, I thought I would replace the boots with better performance from www.theDieselSite.com. Seems like the OEM ones have become a bit mushy and have allowed the pipe to move around more.

Brian
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Old 08-14-2007, 12:41 PM   #4 (permalink)
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Re: Symptoms of Leaking Boots on Intercooler Tubes or Intake to Heads

Yes the oil residue is normal and can be cleaned right off with degreaser. I was tired of getting the residue on everything and chose to the the CCV mod (Crank Case bypass Mod), then installed new boots from dieselsite.. No more oil residue now. The oil residue comes from your crank case vent in which it vents vapors into the turbo. It fills your intercooler as well.. Its a very simple mod and can be made with supplies from Home Depot. I bought a complete kit off ebay that has everything including details instructions for $40..

I would say that new boots should also take care of you IC pipe movement, at least it did for me. You do still need some movement however due to the engine torque and engine movement.
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Old 08-14-2007, 01:30 PM   #5 (permalink)
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Re: Symptoms of Leaking Boots on Intercooler Tubes or Intake to Heads

Yeah, I think I am going to do the CCV Mod and change all the boots.

What torque am I supposed to apply to the clamps?

Any ideas on the deep graoning sound coming from the motor while applying the gas? Seems to be more prevalent while uphill or with loads.

Are there any aftermarket IC or up-pipes that I should consider when changing the boots?
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Old 08-14-2007, 03:11 PM   #6 (permalink)
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Re: Symptoms of Leaking Boots on Intercooler Tubes or Intake to Heads

No just leave the pipes they are good, just new boots should do the trick. There is no torque spec that I know of for the clamp bolts.. I used hairspray on my IC pipes after cleaning them really good and have not had any boots blowing off since.
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Old 08-15-2007, 05:05 PM   #7 (permalink)
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Re: Symptoms of Leaking Boots on Intercooler Tubes or Intake to Heads

According to the repair manual DVD, 71 Lb/in.
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