[revjpeterson]

Rationale: Many of the emissions sensor failures that occur on the Cruze Diesel are speculated to be traced back to un-metered air entering the intake system. One source for this un-metered air could be if any of the 5 hose clamps between the air filter and the turbo inlet are under-tightened. Use the following procedure to locate and check the tightness of these intake clamps:

Procedure:

1. Open the hood - http://www.cruzetalk.com/forum/169-chevy-cruze-diesel-how-diy-library/8538-how-open-hood.html

2. Locate the hose and clamps to be checked - indicated by the circled area in the picture below:

3. Use a flat-head screwdriver or 7mm nut-driver to firmly turn the screws on the clamp clockwise. The location of the 5 clamp screws is indicated in the photo below:

If they move more than 1/8 to 1/4 of a turn, they are loose. If a clamp is lose enough that the duct is able to twist or shift, ensure that the duct is securely positioned before tightening the clamps. Tighten all 5 clamps as firmly as possible. After 3000-5000 miles re-check the clamps to see if they have backed off in that time. If they have backed off, it may be necessary to use blue thread-locker (http://www.amazon.com/Permatex-2401...1451592026&sr=1-3&keywords=blue+thread-locker) or a similar solution to prevent them from loosening over time.

4. Report your results in the poll at: http://www.cruzetalk.com/forum/64-c...any-under-tightened-diesel-intake-clamps.html

 

[revjpeterson]

You didn't mention the ones on the other side of the turbo.

These are the set that have the known issue with being loose, so this quick How To focuses on that. I've never actually seen any further clamps of this style post-turbo, unless they are down by the intercooler where you'd have to take off the bumper to get at them.

 

[revjpeterson]

Ended up snapping off 2 of the clamps when tightening last weekend. Managed to pick up new ones pretty easily at the Fleet-Farm store, but I had to make 2 trips, because Ifound out in the process that 1 of the clamps requires a 5", while the other 4 use a 4".