New Gladiator Leak

[ShadowsPapa]

Edit: There also is no migratory capillary drip staining other than at the bottom of the rubber mount.

Good point, I looked again and in both pictures, it's the mount...... there's no trail leading to it or the washer below. The drip on the washer is coming from straight up and there's no trail on the rubber mount at all, it's dry all around.
As they might say on one of the CSI shows - no directional spatter, no cast-off pattern, no high-velocity spatter, etc.

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[IanNubbit]

It’s not described as fluid filled. But 68328257AC is your part number. Gotta research if it’s a hydraulic mount.

 

[ShadowsPapa]

It’s not described as fluid filled. But 68328257AC is your part number. Gotta research if it’s a hydraulic mount.

This isn't the first pic we've seen on the forms that looks just about like that.

Here's a specific post showing it and there's a post from a fellow in that same thread who said his dealer replaced the mount....
https://www.jeepgladiatorforum.com/...nd-why-is-it-leaking.43645/page-2#post-703450

 

[IanNubbit]

This isn't the first pic we've seen on the forms that looks just about like that.

Here's a specific post showing it and there's a post from a fellow in that same thread who said his dealer replaced the mount....
https://www.jeepgladiatorforum.com/...nd-why-is-it-leaking.43645/page-2#post-703450

Weird how basically the only 2 that I’ve seen failed where Rubicon/Mojave’s. Just a weird correlation I see. Definitely would like to hold a failed one side by side with a new one to see if there’s any noticeable failure

 

[SonoranMojave]

Leaking hydraulic mount sounds plausible, especially since I’ve had problems with those in the past lol. (Motor mounts failed prematurely on our WK2).

Probably not many of these have been replaced so hopefully dealer doesn’t act dumb if that is the solution.

Here is probably the best angle showing the leak.

 

[Dougstdig]

Can anyone tell me what this is leaking in front of the rear shocks? 2500 miles.

The body/bed mount isn’t fluid filled is it? I don’t think mine has any lubricants or coolants that color. Did something spill in the bed and it’s just now finding it’s way down?

 

[ShadowsPapa]

The body/bed mount isn’t fluid filled is it? I don’t think mine has any lubricants or coolants that color. Did something spill in the bed and it’s just now finding it’s way down?

No, again, this isn't the first of these mentioned in the forums here. That's also not a place anything in the bed would find to get out and down. It's only at the mount, no other place, there are no trails or stains leading to it.
Check the post I made earlier, yes, these ARE "hydraulic" mounts, at least some of them, and this isn't the first time or the first one.
Look at the location - center of that mount and no other place.
They are indeed hydro mounts.
They have been around for years and Jeep isn't the first to use them.
My bet is that fluid is silicone

https://www.sae.org/publications/technical-papers/content/2014-01-2063/


This is a description of one type -
It consists of three elastomeric springs which connect the steel inner collar and plate to the steel outer shell. The inner collar is bolted to the cab with a through bolt, and the shell is bolted to the frame. The elastomeric springs also seal the fluid within the mount. Two fluid-filled chambers are connected by two identical parallel inertia tracks running around the circumference of the outer shell. When the inner collar is moved upward with respect to the outer shell, the inner plate and middle elastomeric spring pump fluid from the top chamber, through the inertia tracks, to the bottom chamber, shown in Figure 4. Likewise, when the inner collar is moved downward, fluid is pumped from the bottom chamber to the top chamber.

 

[OHJeeper]

What's above it (in the engine compartment)? The color looks kind of like ATF or Power Steering fluid.... usually a darker red, but sometimes pictures don't capture the colors accurately.

Could be dripping from above and then making its way down the bushing inside that mount.

 

[Renegade]

What's above it (in the engine compartment)? The color looks kind of like ATF or Power Steering fluid.... usually a darker red, but sometimes pictures don't capture the colors accurately.

Could be dripping from above and then making its way down the bushing inside that mount.

It's a hydraulic body mount. It's at the rear of the body, not near the engine compartment.
ShadowsPapa has a good memory!

 

[SonoranMojave]

This is at the rear of the cab, nowhere near the engine.

I have an appointment for my dealer to look at it Friday, although when I checked this morning it appeared as if the leak had stopped and there was no fresh drip in my garage.

 

[ShadowsPapa]

What's above it (in the engine compartment)? The color looks kind of like ATF or Power Steering fluid.... usually a darker red, but sometimes pictures don't capture the colors accurately.

Could be dripping from above and then making its way down the bushing inside that mount.

PS fluid is clear in these. Not red. Red is when they used ATF in the PS pump. Not for years now.

There's been at least 2 cases of these hydro-pads leaking like this and the symptom is fluid at the bottom of the bushing and no place else.
These are not your father's truck body mounts.

 

[ShadowsPapa]

This is at the rear of the cab, nowhere near the engine.

I have an appointment for my dealer to look at it Friday, although when I checked this morning it appeared as if the leak had stopped and there was no fresh drip in my garage.

And that's exactly where the hydro or hydraulic body mounts would be used.

It's a hydraulic body mount. It's at the rear of the body, not near the engine compartment.
ShadowsPapa has a good memory!

It's a curse at times - diagnosed severe ADHD, it's impossible to ignore the environment.
Why did I give a rip about a leaking body mount? My truck is fine, I was looking for or reading something totally unrelated and yet - I saw it, it stuck.
OK, what was the topic again?

 

[OHJeeper]

PS fluid is clear in these. Not red. Red is when they used ATF in the PS pump. Not for years now.

There's been at least 2 cases of these hydro-pads leaking like this and the symptom is fluid at the bottom of the bushing and no place else.
These are not your father's truck body mounts.

Good to know! I have almost zero experience with the 3.6L, all my hands-on has been with the 3.8L (2008 JK's) and my wife's former Nissan (circa 2010) and both used ATF in the steering.

 

[SonoranMojave]

Well the leak has definitely stopped. I might just keep an eye on it and have the dealer look at it when I get my first oil change in a couple months. A body mount with a very small leak sounds like it could wait for a bit.

 

[Renegade]

Well the leak has definitely stopped. I might just keep an eye on it and have the dealer look at it when I get my first oil change in a couple months. A body mount with a very small leak sounds like it could wait for a bit.

It will probably be fine. You could notice a bit more harmonic road noise. The fluid is there to dampen vibration. Our hydro engine mounts are similar in function.

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