2004 XJ8 90k mi, is it possible for it to groan because of a bad hose
or regulator and not have the pump be the problem ?


It's quite when first started then after driving it for a while it starts
to whine/groan especially while turning.


Hope its not the pump, replacements are stupid expensive


Thanks for any input ..

 

Have you checked the PS fluid level ? It could also be related to the serpentine belt that drives the pump as well as other things. I never had the slightest problem with the power steering right up to part-exing the car at 115k miles.

 

Fraser, fluid level good, will take a closer look the belt, Thank you !

 

I had kind of similar problem, but my car had more of a squeaking sound (although it might be called whining sound too).

On this forum I was advised to look at the Jaguar Technical Bulletin is JTB 00055 and use the fluid C2S 48887. It actually helped!

I am attaching two files from that post. Hope it helps.

 

Many years ago I had a LS400 that made a groan when turning the steering wheel. I flushed the fluid and it cleared up the problem.

 

-Greg- & Brewster411,
Thanks guys, my fluid level is good so I will try the heated additive procedure.
This is very helpful, much thanks ..
Joe

 

 

Panelhead,
That's good advice in general just for preventative maintenance, once this is solved
I'll add that to the PM list ..
Thanks

 

 

Does anyone know if Jaguar Additive PAS Fluid C2S48887 is the same formulation as Lubrizol 6178?

 

According to the Material Data Safety Sheets, they are both amber in color, but otherwise they do not appear to be the same chemically:

Jaguar Additive PAS Fluid C2S48887 MSDS

Lubrizol 6178 MSDS

Cheers,

Don

 

Actually, they are both really close in their chemistry, and both used as an anti-wear additive. Amine phosphates are often used in high pressure lubes for this purpose. The relative proportions between them is close enough to be utilized for the given purpose as long as you use the amount specified.

 

Hi David,

Thanks for chiming in with your expertise. For those of us who are interested in such things, I would welcome further explanation of how these two products are "both really close in their chemistry." Their flash points, densities, viscosities and pour points are virtually identical, but according to the MSDS, the listed ingredients seem very different:

Jaguar Additive PAS Fluid C2S48887:

Reaction products of alcohols C14-18, C18 unsat., esterfied with phosphorous pentoxide and salted with amines, C12-14, -tert-alkyl: CAS 939-591-3

Methanol: CAS 67-56-1 / 200-659-6


Lubrizol 6178:

Alkylamine salt of alkyl phosphoric acid: CAS not determined

Oleyl alcohol: CAS 143-28-2

Mineral Oil: CAS not provided


I only had a couple of years of chemistry, so I admit I'm no expert. But aside from the presence of amine salts, how are these chemically similar? Any additional education would be greatly appreciated!

Cheers,

Don

 

Here, for example is an additive company that sells different variation of amine phosphates for anti-wear additives to lubricants. And while each has a specific range they run in, they too basically carry the same chemical structure as both the Jaguar and Lubrizol additives. And while I'm aware that both utilize different CAS numbers, the basic composition of the additive is the same, both being a derivative of amine phosphate.

 

Hi David,

Did you intend to include a link to another additive company's product? If so, the link didn't make it.

Cheers,

Don

 

Antiwear Additives: NA-LUBE AW 6000 Series | King Industries, Inc.

 

I added a 50ml bottle of Lubrizol 6178 to my 2005 XJ8L and, tickety-boo, it worked! After about a week, the steering wheel squeak has completely disappeared.

 

would like to hear if 90 S-4 solved the problem - this just started happening for me. I checked the fluid level, and it is indeed just a hair below the MIN line, and looking rather black. Might just top it off or put in some additive to see if that helps until it cools down long enough for me to feel like messing with it.

Excellent thread, and i see there is another one showing how to flush the fluid for when I'm ready.

cheers!

 

 

What fluid do you use? I was reading up on Lubeguard, and it claims to be fully compatible but no mention on whether it meets dexron iii specs. would you recommend using any sort of power steering flush product in the process, either the drain or the vacuum out method?