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How many hose clamps did you find under-tightened on your Diesel intake?

  • 1

    Votes: 7 14.3%
  • 3

    Votes: 12 24.5%
  • 4

    Votes: 9 18.4%
  • All 5

    Votes: 6 12.2%
  • None

    Votes: 15 30.6%
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Discussion Starter · #1 ·
On the intake of the Diesel, there are 5 hose clamps holding together the various pieces between the air filter and the entrance to the turbo. These are the type that use a flat head screw to tighten them around the tube. When I checked mine tonight while changing my air filters, I discovered that 3 of the 5 were under-tightened--two of them so loose I could turn the screws by hand without a screwdriver. As un-metered air entering the intake has been proposed as a contributing factor to the sensor failures that some of us have experienced, this is something we should all probably check, along with visually inspecting for areas that could be drawing air. I would like as many Diesel owners as possible to check their hose clamps and report in the poll above how many were under-tightened. If you had any under-tightened clamps, post the age and mileage of your vehicle below. (2 years, 46,000 miles for me.
 

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I could check, not that it would affect my Cruze at this point anyway. I did the intake modification where I removed a piece of the intake piping closer to the wheel-well. Gives the turbo a bit more un-restricted airflow and gives off a bit of a nicer sound that I feel a diesel should have.
 

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I need to check mine now that it has been mentioned. Just to head off any possible down the road issues.
 

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Discussion Starter · #5 ·
I could check, not that it would affect my Cruze at this point anyway. I did the intake modification where I removed a piece of the intake piping closer to the wheel-well. Gives the turbo a bit more un-restricted airflow and gives off a bit of a nicer sound that I feel a diesel should have.
If you just did the resonator delete, but have the factory intake from the air filter through the turbo inlet, then you would still have these 5 hose clamps and this would still apply for you. If those joints are allowing air to enter after the MAF sensor, then you are getting un-metered air that could be a contributing factor to sensor failures.
 

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If you just did the resonator delete, but have the factory intake from the air filter through the turbo inlet, then you would still have these 5 hose clamps and this would still apply for you. If those joints are allowing air to enter after the MAF sensor, then you are getting un-metered air that could be a contributing factor to sensor failures.
Okay. I don't remember seeing that many clamps in that area when I did the modification. I'll have a look tomorrow morning and report back here! Thanks for the heads up.
 

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On the intake of the Diesel, there are 5 hose clamps holding together the various pieces between the air filter and the entrance to the turbo. These are the type that use a flat head screw to tighten them around the tube. When I checked mine tonight while changing my air filters, I discovered that 3 of the 5 were under-tightened--two of them so loose I could turn the screws by hand without a screwdriver. As un-metered air entering the intake has been proposed as a contributing factor to the sensor failures that some of us have experienced, this is something we should all probably check, along with visually inspecting for areas that could be drawing air. I would like as many Diesel owners as possible to check their hose clamps and report in the poll above how many were under-tightened. If you had any under-tightened clamps, post the age and mileage of your vehicle below. (2 years, 46,000 miles for me.
Very interesting post. I am guessing that mine are all tight, otherwise I would not have made 141K miles without any sensor issues, but I'll bet you are onto something with this idea. In fact, I'll bet that many of the reported sensor issues we've seen on this forum would not have happened if this wasn't an issue.
 

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I had the pipe after the turbo disconnect completely at 451miles. Had a lot of issues after that, seems to have been resolved now with some new sensors and cat. Wish I had known earlier, didn't expect a new car off the lot to have loose parts though !
 

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Oh and I only voted 1 because the dealer fixed it, so I'm not sure. At another trip to the dealer for a CEL around 7k miles they sent me on my way saying the intake hose was loose, again.. CEL came back on within 20mins of driving so I never went back to that dealer.
 

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I forgot to check mine...few days of rain....two replacing fuel tanks in my truck and time dragging wife around town..and a morning getting my Cruze windows tinted..will check mine tomorrow.
 

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You know, when I went to the Lordstown meet, I learned that they randomly pull cars off the line to go over them with a fine toothed comb. I always suspected mine was one of those cars, but I will likely never know. This could explain why I never had many issues with my car, such as loose clamps. I will try to remember to check this weekend.
 
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Discussion Starter · #15 ·
I'm thinking I'm going to continue monitoring the clamps to see if they hold or if they loosen on their own. If I have found that they loosened after being left alone for a few thousand miles, then I'm thinking that I will loosen them up, coat the contact area with light or medium thread-locker, and re-tighten them to see if that keeps them from loosening again.
 

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I am assuming these are the 5 clamps between the air cleaner box and the turbo.

I barely had any movement from the screwdriver before they were tight on 3 of mine. So little I considered them already tight.
 

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Guess I could check these when I get home.

But I'll probably just forget.
 
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I'll look at mine. Would be a great thing to check
 

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Oh look at that, I forgot to check. :laugh:

Guess I'll have to put a reminder in my phone.
 
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Discussion Starter · #20 ·
I rechecked them again yesterday (6 weeks and 2500 miles later). 4 of the 5 were looser than when I tightened them at the time of the original post, but none had backed all the way off to finger-tight or far enough to allow air to enter. Unfortunately, I can't know if this is due to normal operation or if they had to diassemble/reassemble any of this while repairing from my car-deer accident before Thanksgiving. So, I'll re-check again in a few thousand miles to see what it reveals.
 
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