What the heck is this thing?

[burntkat]

This is a preassembled, prebled, unserviceable clutch hydraulics assembly for an 05 Liberty 3.7 4x4 Renegade with 6-speed manual transmission....

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What I'm trying to figure out, however, is what in the hell this little gold widget is... Closer views.....

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I've had people tell me it's a one-way valve (can't possibly be, as you'd clutch one time and never move the car again) or an accumulator (unneeded and as far as I'm aware, not possible in line).

Does anyone KNOW? I am making my own line to install separate/serviceable parts, and an not sure if this is part of the problem I had last weekend when it wouldn't work (I'm 99% sure that problem was due to oversized line leaving me with not enough stroke at the SC)...

 

[seafish]

Don’t KNOW for sure but right off the bat, I’m gonna guess that it’s a sort of mini pulse damper to keep any pulses from the throwout bearing/fork/clutch/flywheel from traveling up and down the line if the rotational movement effects the slave cylinder piston.

Stellantis was just getting into NVH remediation more back in 2005

Again just my best guess

 

[seafish]

Like this—

They come as small as 1/8” diameter and while are mostly used for pump installations, there is no reason they couldn’t be used for manual piston applications where a pulsation might be introduced by another rotating mass

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In-Line Pulsation Dampeners | AxFlow

In-line pulsation dampeners reduce pressure pulsationand act as a flexible coupling.

www.axflow.com

 

[burntkat]

That makes complete sense. It fits along with why they put that 15 pound wart on the rear axle pinion. "Tuned mass damper".

I knew someone would have a clue. Many thanks!

 

[seafish]

It fits along with why they put that 15 pound wart on the rear axle pinion. "Tuned mass damper".

Exactly …in fact I almost mentioned that wart AND the failure prone dual mass flywheel that they started to use behind the mighty Cummins)

I highly doubt it will be a problem to leave out.

If you wanted you could call Valair and ask them what they think bout dissing the damper on the hydraulics. They do make a nice upgraded hydraulic line for my2005 Dodge Ram and it has nothing of the sort on it.

 

[burntkat]

Since you seem to know a few things about this sort of thing....

What would be the effect if you took
the stock clutch MC and SC, and installed a hydraulic line between the two (using the proper JIC adapters) that, instead of being 3/16"ID, was 1/4" ID?

Because I did that very thing last weekend... And the damn car wouldn't shift. The line I used was -4 hydraulic line with a 'single wire reinforced' construction, good for 3000psi. So I'm quite sure it wasn't ballooning.

Pretty sure the travel of the slave would have been reduced, by at least a factor of 33%, resulting in the no-shift condition (while running), but I mess around with hydraulics just enough that I have to relearn it every time...

 

[seafish]

Since you seem to know a few things about this sort of thing....

What would be the effect … instead of being 3/16"ID, was 1/4" ID?

Pretty sure the travel of the slave would have been reduced, by at least a factor of 33%, resulting in the no-shift condition …

While I am self taught and YouTube certified with an advanced degree in MacGyverism , I am no hydraulic expert…that said, I totally agree with your assessment on line volume and piston travel

 

[burntkat]

While I am self taught and YouTube certified with an advanced degree in MacGyverism , I am no hydraulic expert…that said, I totally agree with your assessment on line volume and piston travel

OK, so we are in the same boat. Thanks!