Crimped Hose Clamps - Mercedes-Benz Forum
 
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post #1 of 3 (permalink) Old 05-11-2019, 03:01 PM Thread Starter
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Date registered: Aug 2010
Vehicle: '84 Euro 500SE, '85 Euro 2.3-16, '51 Euro 170S, '97 Jeep Wrangler Sport, '15 G63 AMG
Location: San Antonio, Texas/Gulf Breeze, Florida/Neustadt a.d. Aisch, Deutschland
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Crimped Hose Clamps

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.

'85 Euro 190E 2.3-16
'84 Euro 500SE
'51 Euro 170S
'15 G63 AMG
'97 Jeep Wrangler Sport
'98 Dodge Durango SLT+ 5.9L Magnum V8
'96 Ford F350 7.3 PSD

~Josh
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post #2 of 3 (permalink) Old Yesterday, 11:40 AM
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Date registered: Aug 2002
Vehicle: 96 G300DT
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Crimp clamps are a terrible idea on rubber. Most often the best choice is spring clamps. They allow for expansion and contraction and maintain a even tension over time.

...Alan
63 230SL
96 G300DT
98 E300DT
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post #3 of 3 (permalink) Old Today, 02:45 PM Thread Starter
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Date registered: Aug 2010
Vehicle: '84 Euro 500SE, '85 Euro 2.3-16, '51 Euro 170S, '97 Jeep Wrangler Sport, '15 G63 AMG
Location: San Antonio, Texas/Gulf Breeze, Florida/Neustadt a.d. Aisch, Deutschland
Posts: 8,308
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Quote:
Originally Posted by AlanMcR View Post
Crimp clamps are a terrible idea on rubber. Most often the best choice is spring clamps. They allow for expansion and contraction and maintain a even tension over time.
Agreed, though spring clamps can sometimes be a pain to get off if they're facing a weird direction or in a hard to reach area!

Had that issue with the spring clamps on a 2007 F350 with the 6.0... They were reinstalled in a manner that you could reach them much easier, even if you didn't have the fancy spring clamp tool.

It just baffles me that MB would do that.

The fact that the hose is not flush on the other side of that T-fitting is actually beginning to make me antsy. The more I look at it, the more I feel it needs to be addressed.

'85 Euro 190E 2.3-16
'84 Euro 500SE
'51 Euro 170S
'15 G63 AMG
'97 Jeep Wrangler Sport
'98 Dodge Durango SLT+ 5.9L Magnum V8
'96 Ford F350 7.3 PSD

~Josh
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