Model similarities S 1 2 3 and XJS - interchangable parts

[captaincrankit]

Hi all, I was just wondering what the easiest/simplest way is to determine what parts are interchangable between XJ

* Series 1,
* 2,
* 3,
* coupe and
* XJS

I'm a new XJ series 2 coupe owner and try (where I can) to research and order my own parts and perform my own mechanical work on cars I've owned.

I've found SNG Barrets for new parts but also trawling ebay for second hand parts and "new" bargains (please advise who else I should use online like SNG).


I suppose I could find the part number for the Series 2, then go to each of the other models and see if the part number is the same - assuming Jaguar didn't change the part number.

OR

Is there a database or spreadsheet that someone has already pulled together that shows what's interchangable?


I'm asking the above questions because ...
During research to sort the "vauge" steering on my car and Steering Rack bush replacements, I came across discussions on rubber vs poly bushes, also another forum member suggested XJS "sports pack" bushes fit and are a good upgrade without going for the VERY firm poly bushed (Very cheap too at £14 ). Now am wondered what other XJS parts or Series 3 or 1 parts I could consider when looking for replacements.

Thanks in advance Julian

[greenlane]

Hi Julian,
Hope I can help with a few suggestions.

As you say a lot of parts are interchangable between models, as I have learned when searching for parts for my series 2 V12.

You definitely need a parts book for your model, plus one for the other engine size and maybe a S3 one to compare. Is your coupe a 12 or 6?

Many suspension parts are the same, but one difference is in the front suspension geometry on V12 cars.

I have found the Jaguar classic parts website very useful for comparing part numbers and checking what is still available and as the S3 V12 was very similar to the S2 I have ordered several useful parts from them.

Another supplier I have bought from recently is Premierpartsdirect on e-bay.

Hope this is a help to you and don't hesitate to contact me.

Regards
Simon.

[captaincrankit]

Hey thanks Simon, have just ordered a parts book for the Series 2.

Good idea getting other model parts book. I'll also get the Series 3 book. Any benefit in getting the xjs parts book.

I have a the v12, 5.3 fuel injected.

Re: plus one for the other engine size Are you saying I should get a 4.2 parts book ? Why?

Interesting you mention the suspension geometry differences on the front end, V12's vs 6's. Assume wishbones and sway bar ?
I'm looking for dampers/shocks and bushes currently, but cannot see different part numbers. Understandable for bushes, but I'd expect to see differences with shocks.

Thanks again

Julian

[oldtimer]

Hi Julian
Your simple question opens an absolute bag of worms.I have owned my '74 S2 XJ V12 on carbs for 35years or so.also in the parts business! The suggestion that you have Series 1,2,3,parts book is a jolly good start. Not sure why you need 6cyl ref. I guess my first suggestion would be to note your body no. , my vehicle body no is 2R1088. So if the parts picture at the bottom shows an arrow followed by a number, example >2R1598 , then you are before the change point, however if the number is 2R1598> then no good that part is beyond the change point. Gosh I hope that makes sense, if you study the front of the parts manual it is clearly described there. The S1,2,3 have so many common features but many variants in the detail.so each change brings about a new Part No. A part No is a drawing number.
I hope these few words are of some help to you Phil

[almcl]

There are some XJS parts that are interchangeable, but then the XJS was in production for such a long time that lots of bits won't even fit other XJSs. And not just at the pre- and post- facelift boundary, either.

On the series XJ the brakes changed during SII production, and the front lower wishbones did too, although I can't remember when. The carbs changed, the cooling fans did, the exhausts altered, alternators, power steering pumps (and their belts.)

The air con stayed much the same on the SII and SIII, although there are two flavours of compressor clutch wiring (non-interchangeable) the front wings, bonnet, front and rear valence and sills can be moved between SII and SIII long wheel base but the sills have to be modded to fit a coupe. The BW65 and 66 autoboxes are externally similar and can be swapped.

Radiators can be switched, but, depending on which sort, may need a blanking plug fitted and the transmission coolers, although of different spec, can be swapped between SII and SIII.

A 4.2 SIII 'split' block can replace a SII one (and you can guarantee the SII one will be cracked) with no mods.

There is a website with a database of interchangeable parts across most of the Jaguar models: parts but it is rather too American to be much use in UK.

[greenlane]

Hi Julian,

Looks like quite an interesting topic opening up. Pleased to hear your car is a V12 fuel injection, wonder which year?

Hope I didn't cause too much confusion about the parts books. You're right,you probably don't need a six cylinder book unless you come across one cheap. It could be useful to check against buying any mechanical parts by mistake that might be difficult to identify. Likewise the XJS book would be useful as so much of the pre HE was similar to the saloon of the same age. I bought an expansion tank for my car only to find it was off an XJS (any offers out there?)

The parts book that covers the coupe and saloon shows the many mechanical changes that took place on the introduction of fuel injection. Looking at the book, saloon numbers started at 2R 1001 and coupes at 2G1001 and injection was introduced at 2R3922 for the saloon and 2G1015 for the coupe, so interestingly there was only a handful of coupe V12's on carbs. It is interesting that the car number 2R1088 belonging to Phil is such an early one. My own car is an early fuel injection model, car number 2R3982.

In relation to the front suspension , the differences are in the changes made to the top and bottom wishbones and the higher geared steering rack. So this shouldn't affect servicing and replacing bushes etc. One exception is a change to the anti role bar bushes to part number c.32925. There are various springs of course, depending on engine and even if air con or not.
As far as I know the shocks are the same for all S 1 2 3

An importantant point when looking for spares is to remember the change to metric for the braking system, which according to the parts book was at car number 2R1478 for the V12. Probabley around 1974.

I'm sure you won't have any problems getting the right parts from the regular suppliers. I think the challenge is in looking out for the parts that are becoming rare.

Hope all this helps you.

Regards Simon.

[captaincrankit]

Gentlemen, thanks very much for the thorough replies.

Good advice on the Chassis numbers - My Chassis is 2G.1124.BW.

Registrations papers show the first registration is 15.01.76 and its registered as a 1976. Unsure if it rolled of the production line in 1975 or in the first weeks of 1976.

Looks like my first "cross model" purchase will be the xjs steering rack "sports bushes". I decided Poly might be a little too firm. Lets hope the fit LOL

Best

Julian

[oldtimer]

Hi Adrian and All
So interesting , all the contributions on this parts business a lot of which I had forgotton about-cos I'm getting old! I'm about to fit the fourth steering rack due to leaks.The current leak is from the tower head. If you examine the gap between the steering rack tower and exhaust, then exhaust to chassis you will note the very limited gap.I'm sure that the top seal has been cooked by exhaust heat transfer. So please give this careful thought. Regards the rack mounting bushes I tried bolting the mounts up solid with no side movement at all. This dramatically improved the handling on our local lanes at slow to moderate speeds- never shifted out of second -too fast.
On the open it was nearing lethal in that the steering was ultra sensitive. As you will understand I soon changed that. The Poly bushes are probably a good compromise between OE bushes and locking up soild. Any comments anybody?

[PaulGover]

On rack bushes. My XJ6 Series III had the original standard bushes - original meaning a slimy mess covered in oil. I replaced them with new. It's not too easy to understand the diagrams in the workshop manual. As I read it at the time, the two rubber-faced thrust washers were either side of the mounting lug adjacent to the pinion. However, when I had some work done by the local Jaguar dealer, they moved one of the washers to the other lug, so the two washers were as far apart as possible. While I couldn't square that with the manual, it made it a lot easier to get the rack into the mounting brackets. I later replaced the bushes (which again got attacked by leaking engine oil) with poly bushes. I can't say I could tell the difference in handling, but they're a heck of a lot easier to fit.

My XJS V12 had the sports bushes. The rubber was OK on these, but was starting to detach from its (built-in) thrust washer, so I decided to replace them with cheap black poly bushes. Having done so, I can't say there was any significant difference in the handling, and the old bushes were almost certainly good for another 100,000 miles. The free play introduced by the loose rubber was probably only a few thou, and less than the intentional "give" in the thrust washer, though that's probably only a few hundredths of an inch.

A couple of side issues on the XJS. First, I'd replaced the front subframe because it had rusted through. The new one's rack mounting bracket on the non-pinion side was way wider than the rack lug, and needed two or three thick washers to take up the slack. I've seen recommendations to bend the brackets to adjust clearance (not needed, of course), but that strikes me as a dangerous thing to do, as it might weaken the mounting or weld, and I'm rather keen on being able to steer.

The other issue was extracting the sports bushes. The normal approach of pulling them out with a bolt and some spacers won't work, the bolt will strip because the bushes have a large area bonded with Loctite. The workshop manual shows a special tool, which I made up myself, using my lathe, but there are probably safe ways to improvise. The trick is to PUSH the bush out, by jacking it out against the opposite mounting lug. I used a length of 25mm threaded bar with a bit of old 1" ID steel pipe slid over it and resting against a big 25mm nut; "undo" the nut and it pushes against the pipe which in turn pushed against the driving part of my old "puller" bush extractor I'd used on the standard bushes on the XJ6. At the other end, I turned a spigot on the end of the bar which fitted into the spacer housing from the same extractor, which fitted into the opposite mounting lug.

If that makes no sense (and it doesn't to me ) I'll post a photo some time.