I thought the lower front bushing at the very front end (under the radiator) was the hydraulic bushing. Looking at photos at online suppliers, this looks to be just a nylon type bushing in rubber?

Jaguar S-Type, X150, X350 Front Control Arm Bush (for curved wishbone) (C2C39683BU) - JustJagsUK.com

Is the lower front inner bushing actually the hydraulic type?

Jaguar S-Type, X350 Front Wishbone Bush (for straight wishbone) (C2C4437) - JustJagsUK.com

Thanks,
-Michael

 

According to my copy of the Technical Notes of 2003.5, the forward arm (the curved one), has a hydrabush where it attaches to the subframe to provide vibration damping.

 

There is no hydraulic bushes in any of the suspension arms, just plastic and rubber.
There is fluid engine mounts though...


regards.

 

One of my hydrabushes leaked and had to be changed so they must have something in them. There are posts on a Landrover forum that imply there is some sort of viscous silicon fluid in them.

The X350 technical documentation says:

"The lower forward control arm connects to the lateral lower control arm at one end via a ball joint and to the front subframe at the opposite end using hydrabush technology."

 

I'm not sure--but I'm fairly confident the bushing pictured (in the 1st link I posted above) is not hydraulic. No room for it to be filled with any fluid, it looks like it's mostly a block of nylon.

This is what I was expecting a hydraulic bushing to look like:
And to answer my own question on what the hydraulic fluid is on my car, well that would be a drip from the trans cooler lines Otherwise all my front suspension bushings look perfect. Not even tears in the rubber (unlike the rear bushings).

Looks like my wandering steering is due to tie rod ends with their failed boots. Going to replace all 4 of them I suppose. No point paying for an alignment twice.

 

Having just replaced almost all the bushings in the front end of my 04, I can confirm that the bushing for the curved lower arm is indeed filled with dark and smelly fluid... and as banjobill said, the motor mounts are filled with fluid as well

 

Also, if you're replacing them yourself, make sure youget the clocking correct.