Cotter Pin Hose Clamps

[Spiker Engineering]

I'm getting ready to replace all the water hoses in my '97 Limited. I ordered the hoses and clamps, but am baffled by a couple of hose clamps for the hoses for rear heat. These hoses have conventional spring clamps one one end and some kind of goofy clamps with a cotter pin on the other end:

I ordered what I thought were the right clamps to replace the "cotter pin" clamps, but once they arrived I saw that they are for larger hoses:

So I may just reuse the old spring clamps to replace the "cotter pin" clamps.

Still, being OCD, I wonder what the right P/N for the small "cotter pin" clamps might be, why Toyota uses a spring clamp for one end of the hose and this cotter pin clamp for the other end of the same hose, and how on earth does one tension these cotter pin clamps? I can see that if I rotate the cotter pin enough, it'll tension the clamp, but how does one know how much to rotate the cotter pin?

 

[Spiker Engineering]

Maybe I found the answer - How to install OEM heater hose clamps? | IH8MUD Forum

Looks like these clamps were used on "preassembled" components (which explains why only one end of the hose received them), and can/should be replaced with a regular spring clamp when replacing the hose. At least that's my plan at this point .

 

[alumarine]

Why not use gear clamps?

Manufacturers use spring clamps because they are easier and more consistent to install on the assembly line.

 

[phattyduck]

Why not use gear clamps?

Manufacturers use spring clamps because they are easier and more consistent to install on the assembly line.

More importantly, they use spring clamps because they are constant tension and self adjust with aging of the rubber and temperature. No damaged hoses + no leaks = a win for Toyota.

I like that most/all of the new spring clamps you get from Toyota have little clips that you just pull off to install.

-Charlie

 

[shadow247]

More importantly, they use spring clamps because they are constant tension and self adjust with aging of the rubber and temperature. No damaged hoses + no leaks = a win for Toyota.

I like that most/all of the new spring clamps you get from Toyota have little clips that you just pull off to install.

-Charlie

This is the reason.

Overtightening a worm clamp damages the hose, and can lead to premature leaks. Spring Clamps ARE superior to worm clamps for long term reliability. Otherwise Toyota would not have switched.

 

[Spiker Engineering]

I also prefer the spring clamps over gear-clamps. The tension is exactly what it needs to be, so no need to ponder how tight to turn the screw of the gear clamp. I do use gear clamps for non-OEM situations where I don't have a reference for a "factory" spring clamp.

 

[alumarine]

If you guys get leaks or failures with gear clamps you're doing something wrong.
I've installed hundreds of them in various applications without issue.

 

[fourwd1]

People tend to overtighten worm gear clamps causing them to bite into the hose (not good).
The spring type do weaken and loose clamping pressure over time.

A good compromise is the T-bolt constant pressure clamp :

 

[Bad Luck]

....

Please stop spamming the 3rd gen section just to get your post count up. Go to the new member section: https://www.toyota-4runner.org/new-members/ or off topic: https://www.toyota-4runner.org/off-topic/. It's annoying and inconsiderate.

 

[CarolMoors]

I do agree with alumarine, and the gear clamps can be more effective for your purposes. If you are looking for toggle clamps only on Amazon, I suggest you browser for good toggle clamps propositions look for specialized toggle clamps site where you can find a wide range of toggle clamps, including the gear clamps. It is easier to install the gear clamps and adjust them effectively in the necessary places. Personally, I adjusted the gear clamps to handle my water system.

 

[Hvacman]

Yeah just wait till you try to remove those original cotter pin style clamps. Freaking pain in the ass you got to destroy them to get them off unless I missed something.

 

[Spiker Engineering]

Yeah just wait till you try to remove those original cotter pin style clamps. Freaking pain in the ass you got to destroy them to get them off unless I missed something.

Forget about trying to "undo" those clamps- I just cut them with a pair of tin snips and used the OEM spring clamp, 90467-14029, with the new hose.

 

[Hvacman]

That’s good advice. Next time!

 

[3bears]

Forget about trying to "undo" those clamps- I just cut them with a pair of tin snips and used the OEM spring clamp, 90467-14029, with the new hose.

which hose is that, im about to order all new hoses and that one is not on my list
list un part generated from this thread
What other hoses should I replace?

 

[Spiker Engineering]

which hose is that, im about to order all new hoses and that one is not on my list
list un part generated from this thread
What other hoses should I replace?

That one is #9 in the diagram, used for rear heat. I'm putting together the complete list of hoses and clamps to go along with the other thread, here is a part of it:

Some more:

And for completeness, the oil cooler items:

 

[3bears]

That one is #9 in the diagram, used for rear heat. I'm putting together the complete list of hoses and clamps to go along with the other thread, here is a part of it:

thanks....got one for the vacum lines ?
assume you have a v6...mine is a 2000 v6 auto 4wd

 

[96RedRunner]

I liked the clips that hold clamp open had never seen that till couple yrs. ago.

 

[Spiker Engineering]

thanks....got one for the vacum lines ?
assume you have a v6...mine is a 2000 v6 auto 4wd

Working the list up right now for my '97 3.4L, about 90% done. Many folks recommend using regular vacuum hose, but I am finding many hoses with different diameters on the two ends. And many are preformed. So I'm thinking of just buying once crying once (including one $40 hose, ouch), and going OEM. One appears to be discontinued however.

 

[Spiker Engineering]

I liked the clips that hold clamp open had never seen that till couple yrs. ago.

Yup, that is a nice feature.

 

[96RedRunner]

Yup, that is a nice feature.

They reusable comes in handy if you need it. :yo: