2007 Intl few issues/questions

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by God prefers Diesels, Oct 25, 2020.

  1. God prefers Diesels

    God prefers Diesels Medium Load Member

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    VIN: 7C532829

    1. What is normal max boost on this truck? Say 1500rpm in tenth, I'm seeing about 28psi. Turbo was barking a lot at full throttle. I unplugged the EGR valve, and it quit doing that, but max boost stayed the same.

    2. Gear shifter clicking side to side. I'm not talking about normal drivetrain flex. If I'm loaded and give it throttle, it will "click" to the side. Enough to move the top of the shifter about 2 inches. If I let off the throttle, it will click back to the other side.

    3. Grinding noise when I push in the clutch. It grinds as through the entire range of motion, from release, all the way to the tranny brake.

    4. When I accelerate loaded, and the truck flexes, I hear air releasing somewhere that releases based on flex if that makes any sense.

    5. Sometimes when I start the truck, the starter solenoid will engage and disengage rapidly four or five times before it "catches" and starts the truck.

    Thanks in advance for any help.
     
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  3. AModelCat

    AModelCat Road Train Member

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    #2: Check the engine mounts. I'd check the cab mounts too. Never know, frame flex could be shifting the cab.

    #3: Is it grinding only while the engine's running? If so, could be the pilot bearing or the release bearing.

    #4: Random guess but maybe turbo actuator (if it has one)? Maybe a boost leak?

    #5: Sounds like the solenoid on the starter could be on its way out.
     
  4. God prefers Diesels

    God prefers Diesels Medium Load Member

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    Even if I'm very slow and smooth releasing the clutch, so the frame doesn't flex, the gear shifter will "click" to the side, and stay there until I let off the throttle, and then it will click back to the other side.

    Yes. I figured that. I really don't want to drop the tranny yet!!!

    Let me clarify: It's coming from the rear of the truck. Like flex is causing the leveling valve to dump the bags? Is that something that can/should happen when the truck is flexing? Can the axles on a Semi rotate under torque like on a pickup?

    I thought that too, but I swear I read there was some relay for the thermo protection on that starter that could cause that, but I can't find that thread again.
     
  5. Lostkeys

    Lostkeys Medium Load Member

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    #2. What AModelCAT said. The front cab mounts are aluminum and are prone to cracking due to corrosion. Replacing the rubber front cab mounts actually fixed my clutch brake issues on my 9400.
    Also make sure the trans is not separating from the engine because of loose/broken bolts.
     
  6. blairandgretchen

    blairandgretchen Road Train Member

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    #3 - thrust bearing well greased?

    #4 - leveling is common, but I’ve never been able to audibly hear while driving, only when I park on uneven surface.
     
  7. God prefers Diesels

    God prefers Diesels Medium Load Member

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    Good question. I've greased it, but very little. I think I'll get my wife to give it some clutch while I grease it with the engine running, and see if I can get it to shut up.
     
  8. God prefers Diesels

    God prefers Diesels Medium Load Member

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    Bonus question: I've got 2.75" between top of U-bolts and axle stop on my front drive, but 3 5/8 on the rear axle. Does only the front axle matter when it comes to ride height?
     
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