Javelin exhaust

[paul wilks]

Right! Before anyone starts, I know this is a DAFT question but has anyone a pic/drawing (not from the parts list book!) of HOW and WHERE the rear mounting bracket (part 54328):

a) fits to the boot floor AND
b) whereabouts on the rear tail pipe the 'flange' or 'web' for connecting the rubber mounting- small (part 54063) to the bracket (part 54328) AND
c) how the rear tail pipe fits to the bracket (i.e. inside the bracket or under the bracket?) AND


My local garage has had a great deal of trouble fitting the stainless steel exhaust which I've had for about 30+ years(!- yes that's right!!)
I understand JCS has a new supplier so this shouldn't be an issue now.

I suspect the rear 'flange' or 'web' (as shown in the parts list) is in the wrong place, being at the lower portion of the 'arc' over the rear axle rather than at the higher section. Hope you see what I mean!

Anyway my garage has fitted the exhaust and, following the parts list diagram and using the 'flange' or 'web' fitted to the exhaust, have connected the rear pipe to the rear axle using the 'spare hole' on diff casing!

I confess the diagram is very misleading BUT I didn't take a pic before they removed the old exhaust, thinking it would be an easy job, forgetting that nothing is an easy job on 'Yellow Peril'

Any help re a pic or a sketch would be appreciated.

Thanks

Paul (exhausted)

[Alf Heseltine]

Hi Paul, the exhaust should not be connected to the axle, damage may result when the rear suspension
is working. The rear pipe hangs from the boot floor (metal flange area where the wooden floor is located)
the fixing bolt going through the wooden floor & then through the metal flange. The hole in the wood is
oversize to allow a socket for tightening. The tail-pipe bracket is fixed just behind the petrol tank. The fixing
bolt is located inside the tool-box compartment in the boot. This is the set-up we have. The tail pipe comes close
to the petrol tank & accurate fitting of the exhaust is required to stop it fouling the tank.
Hope this helps Paul.

Alf.

[Forumadmin]

I would not take my car back to that garage!

[paul wilks]

Thanks Alf.

I still think this is the result of the 'flange' on the rear tail pipe being in the wrong place.
Presumably the flange on your Javelin is at the top of the 'arc' of the rear pipe- mine is at the lowest point!
I'd be grateful if you could confirm this please, Alf. Thanks

Paul

[paul wilks]

Just one more thing(!)

Imagining the rear mounting bracket (part 54328) as a letter 'C', does the rubber mounting- small (part 54063) fit:
a) ON INSIDE the lower part of the 'C' or
b) UNDERNEATH the 'C'?

a) If it fits INSIDE the bracket then obviously the web of the exhaust must presumably fit on the TOP of the rubber mounting.
b) If it fits UNDERNEATH the bracket then presumably the web of the exhaust fits UNDER the rubber mounting.

Now I realise that to those who are 'well in the know' this will seem pretty basic stuff but please bear with me because I would really appreciate any advice and guidance. I'll have to have it fitted properly before the Rally!! Otherwise I'll be there in the 'modern'

Thanks

Paul

[Alf Heseltine]

Paul, you may find this pic. of some use. You should have the bracket etc when the old system
was removed. It is best not to tighten the system until you are certain there is correct clearance
where the exhaust pipe passes through the chassis. After final tightening of all the fittings check for
clearance at the petrol tank & that fouling of the chassis does not occur.
The Javelin exhaust in the pict. uses a simple clamp bracket that slides along the pipe to the best position
& then nipped up.
Hope you don't have use the modern.

Alf.

[Forumadmin]

Some of the old systems were not correctly bent or attachment points correctly positioned. As Alf says, check that the system will not rattle anywhere by vigourously shaking the pipe in various places. Also make sure that it does not come too close to the petrol tank or will be hit by the handbrake rods when in full bounce (measure the gap between the stop and the bounce rubber and project this distance from the exhaust pipe to anywhere it might hit.)

Whilst you are at it, also do this to the spare wheel tray as I have found the handbrake compensator can hit.

Also make sure all flexi brake hoses and handbrake cable do not foul anywhere throughout travel of suspension. This should be done on front as well with steering in full lock. Many cars I see have the hoses touching at some point and need to be rotated slightly.

[paul wilks]

Thanks Alf and Keith. Hopefully from the info and the very helpful pic we should be able to fettle it.

Thanks again

Paul

[Forumadmin]

Here is an extract by Richard Geiger from April 1995 Jowetteer:

I have just fitted a stainless steel exhaust system to my Javelin. I took the decision to.....

scan0001.jpg

[paul wilks]

Blooming heck, Keith! What a nightmare. Garage hasn't had to do so many alterations BUT luckily I have an unused rear pipe in case it is needed, because I still think that's where the problem lies with this particular stainless steel exhaust.
I wonder if JCS would supply just a rear section and whether the production is better than it was 30+ years ago?

Paul

[Forumadmin]

Exhaust systems require very accurate bending, since over the 4 metre length even a 1 degree error or error of 1 cm in the bending location can make a considerable difference. Fitting the system to my Jup required some modification. I do not think that Richard's ascertion that a visit to the scrap yard (or local factor) will provide the necessary. However, off the shelf bends may be available to make up a custom system, but with considerable (expert) welding required and an accurate jig (or car itself). I had one made for my Subaru by a firm in Birmingham, saving a considerable amount on Subaru's price.

Richard's tale was just prior to the setting up of JowettTalk, but he shared his experiences in the Jowetteer. All we need now is for people to scan in those experiences that have accumulated over the years. Any offers?