I am replacing all my coolant hoses while doing a flush on my truck.
I bought a set of (Mishimoto) silicone replacement hoses instead of the OEM rubber.
It came with worm drive stainless clamps.
The old rubber hoses used the factory tension clamps.

The question is: is the SS one the correct clamp?

I have seen and understand the pressure clamp works well on rubber since it can expand/contract automatically.
However, the silicone hoses are thicker and stiffer, so I assume less heat transfer and movement.
I can see why not to use worm drive on rubber but wonder if I should redo the clamps before I fill it back up with coolant?

I can't find much info on the right clamp for silicone but lots on use the pressure clamps for rubber.

Any insight?

Good question. I’ve wondered that as well.

I prefer oem spring clamps (round wire type).
I've had the screw type clamp cut into hoses, the spring type usually don't.

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I have found that over time the screw type will need attention to re-torque them. The spring type, not. I am not sure if the rubber shrinks or if the clamps loosen somehow?

I recently installed a supercharger on my Tundra and one of the coolant connections started leaking very slightly. I checked them and several needed a turn or two to be snugged down again. No more leaks.

With the spring style clamp, it applies even pressure around the entire hose.

With the screw clamps, It leaves a weak spot under the screw housing where the hose material is somewhat compressed as the band is tightened. Lifting the clamp off of the uncompressed material making it susceptible to leaks. The slots in the band will also cut into the hose.

Be sure you’re using the correct coolant.

https://penriteoil.com.au/asse...one-Hose-Fitting.pdf

Aussie site but has the info.

me personally would use constant tension clamps as the preferred alternative. But metal lined clamps are an acceptable alternative, but make sure you anticipate a regular check them strategy. I would never use a traditional hose clamp as it exposes the hose to many sharp edges.

There are worm drive and t-bolt hose clamps that apply even pressure the entire circumference of a hose. They’re made for both soft and firm hoses. I’ve got them on the hot/cold charge pipes on three turbo charged engines and one supercharged engine. There’s no way a spring clamp would hold the pressure.

Mishimoto has an excellent reputation. I would call them if I had questions about the clamps they provided.

I wouldn’t use the spring clamps from the old soft rubber hoses with the firmer silicone hoses because they wouldn’t provide the same amount of clamping pressure on the fitting. Think of it this way, if you had a copper pipe that fit over the radiator fitting, how tight would that connection be using the spring clamp from the rubber hose?

As long as the clamps are for silicone hoses with the metal insert they will be fine.

The Mishimoto hoses (had them on the GTO) tend to be thicker/stiffer than stock.

The tension type may not provide enough force to make a good seal.

Since you bought a "best" type hose, there are also the worm-gear type clamps which don't / cannot pinch the hose.

quote:

Since you bought a "best" type hose, there are also the worm-gear type clamps which don't / cannot pinch the hose.

I just used ABA brand clamps like these on a relatively light pressure turbo. They don't pinch and are my go to hose clamp. I just could not pay what they wanted for the various T-clamps. They're good, superior even but, damn.

It's normal for there to be a little oil in an intake system over time. What kind of boost is in there, like 15 pounds? Just make sure to wipe off the mating surfaces really well and you shouldn't have any hoses blow off. I used some brake cleaner and then some alcohol on a rag to be certain the inside of the hose and the surface to be clamped was super clean. Never had one problem.

I would hope the company that sold you the hoses and clamps would give you the appropriate type and quality.
If not, I'd question the hoses as well.

These provide even clamping around the entire hose: Lined hose clamp
The liner overlaps itself so it gets smaller in diameter as you tighten the clamp.

quote:

Mishimoto) silicone replacement hoses

Link


The web page for Mishimoto states they provide high quality worm gear claims where applicable.

If they came with clamps, I would use the ones they supply