heavy steering

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WULLIE4567
Posts: 192
Joined: Thu Sep 22, 2005 6:44 pm
Location: EAST AYRSHIRE

heavy steering

Postby WULLIE4567 » Tue Oct 11, 2005 10:18 pm

:)
Hi everyone see if I can pick your brains a wee bit here. my xjs, since buying her about a year ago has always had quite heavy steering like driving with low pressured tyres, quite heavy when manouvering as well. I have fitted a second hand power steering pump - no difference. the rack looks as if it has been replaced at some time, no leaks on the rack, it could be goosed I supposed. she also wanders when driving on dual carriageways, correcting here all the time. (same as the wife) I have checked the wishbones for wear, and the trackrods, tyres seam to be wearing ok, car went for MOT a few months ago they gave the steering an awful shaking about, said there may be a wee bit of wear in the rack joints.
do any of you xjs owners have the same problem?
what does your steering feel like light or heavy?
has anybody any idea whats wrong?
thanks wullie :evil:
XJS AWAY TO NEW OWNER.
XK8 COUPE MY 2000 MY TOY & RANGE ROVER SPORT WORKHORSE.

Martin
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Joined: Sun Sep 25, 2005 2:06 pm

heavy steering

Postby Martin » Tue Oct 11, 2005 10:48 pm

Well it sounds as if the power assistance isn't working as well as it should. Mine is not light like an XJ40, it's heavier than that, but still easy.

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WULLIE4567
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heavy steering

Postby WULLIE4567 » Wed Oct 12, 2005 9:59 pm

cheers Martin anybody else, :)
XJS AWAY TO NEW OWNER.
XK8 COUPE MY 2000 MY TOY & RANGE ROVER SPORT WORKHORSE.

almcl
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heavy steering

Postby almcl » Thu Oct 13, 2005 9:26 am

Hi Wullie

My facelift is heavier than either XJ6 that I own but not too unreasonable.

What tyres have you and what pressures?

For the wandering issue, what condition are the the rear radius arm bushes in?
Al McL
'93 XJS 4.0 - '05 X type Est 2.0D - '13 XF 2.2D Sportbrake

Sheepy
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heavy steering

Postby Sheepy » Thu Oct 13, 2005 11:03 am

Best suggestion is find someone near you with an XJS that you can try turning to see if it differs to your car.

As for the wander and vagueness in steering, then a) do you have the right rack fitted, and b) try changing the mounting bushes.

According to the guys who supply my parts, replacing the XJS rack with an XJ6 version is quite common due to the higher availability. Unfortunately the lock-to-lock response is different, and can make the XJS steering seem vague. I killed my old rack and did an exchange for a genuine XJS version (and changed the mounting bushes too) and was very surprised by the change in handling.

Sheepy
---------
'66 MGB Roadster

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WULLIE4567
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heavy steering

Postby WULLIE4567 » Thu Oct 13, 2005 7:53 pm

thanks Al and sheepy

Al, I have had both 6 and 12 cyl, xj6's, back in 1975 ish, I remember the steering very light, that why I think my xjs is heavy. I run on pirelli tyres 30lbs pressure. rear arms have either been replaced or are in first class condition same with bushes.

Sheepy, I dont know anybody in my area but there is some guys up the west coast a bit from me I may contact them. the rack is the one that was on the car when I bought it I will check the part number on it. the mount bushes are ok no movment in it.
I am thinking of going to the jag spares day next sunday it's about six hours drive for me might take the wife if she good. might get a rack down there, anybody else going? that may be a good place to try another xjs steering. :D
XJS AWAY TO NEW OWNER.
XK8 COUPE MY 2000 MY TOY & RANGE ROVER SPORT WORKHORSE.

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WULLIE4567
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heavy steering

Postby WULLIE4567 » Thu Oct 13, 2005 8:00 pm

Al, just been in your web site, nice site and nice jags. you seem to have had a nice trip to Africa, exellant story and pictures. cheers wullie.
XJS AWAY TO NEW OWNER.
XK8 COUPE MY 2000 MY TOY & RANGE ROVER SPORT WORKHORSE.

Martin
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Joined: Sun Sep 25, 2005 2:06 pm

heavy steering

Postby Martin » Fri Oct 14, 2005 1:18 pm

Hi Wullie - yes I'm going to the jag spares day. Don't know exactly what I'm going to be looking for yet. But I'm bound to see something that I didn't know I needed. :wink:

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WULLIE4567
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heavy steering

Postby WULLIE4567 » Fri Oct 14, 2005 1:55 pm

Martin
just found out I may be sent to holland to work for a few weeks, dont know for certin yet, if so I'll miss the spares day yet again. if not I will probably be looking for a steering rack.

another question for everybody, whats your opinion on the four round headlight conversion for the xjs's?
wullie :roll:
XJS AWAY TO NEW OWNER.
XK8 COUPE MY 2000 MY TOY & RANGE ROVER SPORT WORKHORSE.

SimonR
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heavy steering

Postby SimonR » Fri Oct 14, 2005 3:19 pm

Wullie,

I think I may be in the minority but I prefer the US-Spec headlights. I think they make the car look more purposeful and sporty.

I know that Sir William Lyons didn't like them much but at the time they were a requirement in the US so had to be fitted. The US ones were sealed beam and therefore not very high-performing, much better to get non-sealed beam ones.

I am in the process of converting my UK XJ-S to twin headlights, I have a set from San Francisco and just need to buy a pair of UK-compattible dipping units before fitting them to KXI.

Getting parts for a conversion can be a little tricky but I think worth it. It doesn't help that Jaguar have made a dog's dinner of the part numbers and specified the same (mainbeam, inner) units for the inner and outer lights. I'm going to try and buy parts from a Heller specialist.

Simon R.

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Mark_B
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heavy steering

Postby Mark_B » Sat Oct 15, 2005 2:15 am

I wish my steering was heavy as yours, mine is too light, want to swap? :) You can steer mine with just one finger, it's well overboosted!

This is because if the Torsion Bar in the valve block loses it stiffness, the direct steering effort (the 'feel') directly driving the rack (via the meshed pinion) is diminished, because the torsion bar flexes too easily, allowing the power assistance to kick in after the valve opens, because it thinks you are twisting quite hard. If you took away the torsion bar completely you'd have extremely light steering, but with no feel at all. The trouble is when you get a rebuilt rack, unless you'd paid megabucks you'll likely get one that's got a valveblock from a 1979 car, but does have new rubbers fitted and nicely painted.

I suspect in your case you have a nice rack that I would be envious of, but you have worn front wishbone bushes and trackrod ends that have been missed and/or wobbly radius arm bushes. (lookout for outer-edge tyre wear at least) Mine wishbone bushes were loose for me & yet must had passed at least 2 mot's! (I trust your rack's pinion clearance adjustment is not too tight, if it was, then the result steering response would be an abrupt and regular 'zig-zag' steered route along the road)

I'd heard a story about a guy who'd drove his car with no power steering assistance, I think he ran out of fluid, after he fixed it he found the steering was no longer firm steering he used to have, but too light. I reckon he must had weakened the torsion bar.
XJ-S 3.6 230k miles +

Martin
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Joined: Sun Sep 25, 2005 2:06 pm

heavy steering

Postby Martin » Sat Oct 15, 2005 10:51 am

Wullie - the four headlight conversion. I think the distinctive shape of the UK spec headlamps is one of those character defining bits of the XJS. Personally I think the 4 headlamp version has less character.

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Mark_B
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heavy steering

Postby Mark_B » Sat Oct 15, 2005 3:36 pm

Just another view on the 4-lights, everyone I known so far who changed to them had complained about how dim they were compared to the standard oval ones. Maybe there's a generic HID (proper, NOT a 'HID' blue-coloured bulb!) headlamp unit you can adapt for use on the XJ-S.
XJ-S 3.6 230k miles +

keithmervyn
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heavy steering

Postby keithmervyn » Thu Oct 27, 2005 9:29 pm

Ref US-style twin headlamps on XJS, pre or post facelift, see my article "Double Vision" which was published in the April 2003 edition of the JEC mag. My "doubles" throw out much mor powerful beams than the old slab-glasses and certainly look much more appropriate to a convertible.
Keith MR

SimonR
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heavy steering

Postby SimonR » Fri Oct 28, 2005 12:17 am

Hi Keith,

I agree with you. Sadly I haven't got that particular article to hand but basically the non-sealedbeam twin headlights (such as the ones I took from an XJ-40 which have H4s in each lamp) are at least as powerful as the standard 'slab' headlights, if not more so. I have recently driven with both and am more than happy with the twins.

I think the confusion arises because people compare the inferior sealed beam lamps to the halogens in the standard UK-spec lights.

Quick question: were there washers/wipers for the twin lights?


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