Why crimp hose clamp vs. spring type

I'm disassembling my engine and broke a plastic splice that joins a braided line just above the alternator to a rubber hose going to ? (I don't recall the name of the part its going to immediately below the alternator). Question is; on the side with the braided line is a standard spring type clamp. On the other side is a crimp connection to the plastic splice/mount. Same crimp connection joins the hose to the part yet to be named. Why would a crimp connection be used here? Only thing I can figure is its a more secure connection to a part of the hose that might not be as accessible when the engine is in the car. Is there a way to remove these crimp clamps without damaging the hose or I just order a new hose? Is it critical to crimp these connections when reassembling? Couple of pics showing this connection (anyone who might happen to know the part name/number would help save some searching, much appreciated).

This is 2004 3.6

I was wondering the same thing. It looks like a pex crimp ring. I wonder if that can be used? By the way, there is a much beefier aftermarket part you can use to replace that plastic fitting. It's made of aluminum.

Typically the reason for crimp clamps instead of spring are one of two. One reason is serviceability vs non serviceable - if a component is not expected to be serviced or not typically sold separately they will use a crimped connection. Take the rubber boot on a Rack & Pinion for an example, the boot is not expected to be serviced so they crimp it. The other reason is access issues. Sometimes the area is too small or too close to other moving parts like a pulley or belt so a spring clamp is not in the best interest. You can remove a crimped clamp. The question becomes is it worth it. Most of the time you will either damage the component or its just not worth the headache considering the cost of the entire part. Also take into thought of how will you re-clamp it? will a spring clamp get in the way? or will you have to buy the special crimped clamp tool? Most of the time its just easier to buy the hose.

It is an Oetiker clamp. You can remove it with a small screwdriver. There is absolutely no need to replace the hose unless it is damaged. Spring clamps are used for manufacturing efficiency. There is no downside to replacing the spring clamp and oetiker clamp with a worm drive clamp. That "splice" part is readily available as a Porsche part in plastic, but there is a stainless steel and aluminum version (~$50) that is much more durable. It is made by Rauch and Speigel or something like that. If you can't find it, let me know and I can get the part number from the box in the garage.

That hose is sold as one piece with the plate it is attached to. I absolutely hate the crimper type, lazy *** factory garbage. You cannot remove it unless you cut it off with a dremmel tool. You cannot reuse it and have to replace it with another worm type clamp. The spring clamp is not much better because the spring ears can be impossible to get to in some applications (like audi heater hoses) Get an after market METAL replacement for the plastic hose ends. Then use worm-type clamp to replace the factory spring or crimp type clamps. The hose is just a regular small size coolant hose that can be bought anywhere for 50 cents. Yah yah yah the worm hose clamps do not evenly apply the pressure at all around the perimeter of a hose... yes but you tighten it enough then who cares?

Thanks all. CDS, if you have a part number handy for either the plastic oem or the metal after market, it would be much appreciated. Lot's of parts to look up through this project so every little short cut helps!

Here you go, I just happened to have mine laying on the bench. I've used Oetiker clamps on a car that I was trying to keep original because at the time, I was entering it in shows. With worm drive clamps I just make sure I'm using the German style ones.

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Thanks!

Just a word of advice, that lower hose that goes to the water pump is two different diameters, different at the bottom as compared to where it attaches to the fitting. I tried some regular diameter heat hose and it did not work, because it has to be large enough to fit on the fitting at the water pump and then it is too large to seal on the fitting. At least on my 99 C2 3.4L engine. I ordered the correct hose from AutoAtlanta.

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It looks like Oetiker is a brand of pex clamp. I'm guessing that any pex clamp that is the correct size can be used. Does anyone have any different information?

"Oetiker's" (Oetiker is the manufacturer) are 1 time use crimp clamps (yes they use them on Pex plumbing and also in many irrigation applications) - you can use them wherever you need a quick, inexpensive clamp connection (as long as you can find the proper size - if the clamp meets itself before getting tight when crimped, it will leak). There's nothing "wrong" with using them, but you can wind up damaging the hose if you need to remove...

FYI the clearance between that connection and the accessory belt is close make sure it doesn't interfere if you use a worm gear clamp.

The crimp ons and the spring clamps provide constant pressure and cant be over-tightened.. I saw a study one time by a big chiller manufacturer and they determined the screw tightened Hose clamps were responsible for a lot of the hose failures on their systems. They mandated spring type and hteir $$ cost on maintenance/repairs went down a bunch.

�Spring clamps are used for manufacturing efficiency.� ie: it�s cheaper...

Oetiker clamps are used on hose connections that see wide temperature changes, since they expand and contract while maintaining a constant force around the circumference of the fitting. Spring clamps are a cheaper solution. Worm drive clamps provide only one force and don’t do well with wide temperature changes. If you look a high-end race cars, they use Oetiker clamps on coolant hoses, etc. See here for more info: https://www.pegasusautoracing.com/pr...p?Product=3295 . You should only use worm drive clamps that have rounded edges.