Just a warning for everyone who may have these crimped hose clamps on their cooling system.
As metal expands and contracts continuously, it fatigues and may warp over time. This includes never quite contracting back down to its original diameter. Unlike a traditional hose clamp, where there is something to counter balance the expansion of the clamp as it warms up, there's no such force on these.
What ultimately happens is that they expand so much that it no longer provides a tight seal, and the pressure of the cooling system can push the hose of the fitting, as is what happened today on my G63:
Here's the part to beware of:
A quick trip to the dealer for coolant and a free hose clamp allowed me to get the vehicle back into service:
You can see to the left of the traditional clamp where there is another such crimp clamp. This one appears okay, but I will be keeping an eye on it. Were it not for being in a strip mall parking lot, I'd have likely gone ahead and replaced ALL of these crimp clamps with traditional clamps.
This is just a cautionary tale on something to keep an eye on.