Jupiter Exhaust

conrod · Post by **conrod** » Thu Dec 31, 2009 8:31 pm

Can anyone please tell me where I can obtain a Jupiter exhaust ?

Alastair Gregg · Post by **Alastair Gregg** » Fri Jan 01, 2010 12:42 pm

You could (less than a year ago) get them in mild steel from Jowett Car Spares. You may know more than I now. If not please re post and I will look into it.

Happy New Year

and....

Post by **Forumadmin** » Sat Jan 02, 2010 11:59 pm

http://www.youtube.com/watch?v=0-OovTFGPRQ
This video has been removed from public view on You Tube. If you want to view suggest you contact Graham.

hauling it out

Keith
Thank you for your ''festive message'' it was much appreciated.
Late last year I came across a real ''barn find'' Jupiter which is in incredible condition, only requiring a new floor, engine rebuild and minor welding.
The car is very close to going back on the road all ready for the Shropshire event early next year.
There are two problem areas that I would be grateful for your assistance:

1) I need a Jupiter exhaust - any ideas ?

2) I have rebuilt the engine which runs magnificently and ticks over perfectly and revs as you would expect.
However the oil pressure on tick over is very low, but increases to 40 lbs when you rev the engine.
It does not run hot and there is not any sign of anything wrong at all.
The oil pump had minimal wear and the cam followers were a good fit.I have even had the sump off again and fitted a paper gasket in the oil pump with no improvement in pressure.
Do you have any suggestions as to what could be causing the problem ?

Regards
Graham Berry

vicboddy · Post by **vicboddy** » Sun Jan 03, 2010 6:12 pm

Hello Graham,

There are hundreds of people in the club who know Jowett engine problems better than I, but an idea: Some years ago, I rebuild a Healey engine, and had oil pressure problems as you describe. It turned out to be due to a tiny bit of dirt which was stopping the oil pressure relief valve from closing correctly. The Healey and Jupiter pumps are similar, if not identical.

In the technical notes, there is mention of low oil pressure when blocks drilled for hydraulic tappets are fitted with solid tappets. But this should not affect high spead pressure, I understand.

Regards Vic

David Morris · Post by **David Morris** » Wed Jan 06, 2010 1:30 pm

Hi Graham,

You lucky lad!! The Jup. looks a super find!

On your question about low oil pressure, there could be several reasons.

Yes, the oil pressure relief valve could be sticking.

If the block was drilled for hydraulic tappets and solid ones have been used, this will give frighteningly low pressure, but only usually on tick over. At speed, the pressure should be normal, ie at 65 psi, or higher.

However, on balance, my best guess would be that you have wear on the main shells. These shed lumps of white metal, in patches around the shell when worn, and the oil streams out.

It might be worth looking to see if there is a leak of oil from the rear main shell bearing into the clutch housing? Normally, the oil seal in the bell housing should stop this, but if the engine has been stored for some time, this might be leaking, especially, if there is a significant blow-out of oil from a worn rear set of main shells.

Advice on what to do next? Either disconnect the oil gauge or think about an engine strip-down? I would go for the first, until the rumbling from the shells gets too serious!! In the meanwhile, sit back and enjoy!

All the best,

David

Peter Holden · Post by **Peter Holden** » Wed Jan 06, 2010 7:08 pm

Hi Graham
That Jupiter you have aquired - is that the one with the off side front suspension all dismantled - the weight of the car on the front wheel just under the drivers seat? if it is I saw it about 15 years ago and had a good long chat with the owner - he was very anti selling it at the time - be good to see it on the road

Keith Clements · Post by **Keith Clements** » Wed Jan 06, 2010 8:24 pm

Obviously did not like the look of you Peter!

conrod · Post by **conrod** » Wed Jan 06, 2010 10:59 pm

Peter
The jupiter had the steering rack removed as it had ceased and the front wheels off the car.
However, the brakes were not ceased and everything was as it was left 42 years ago

Regards
Graham

vicboddy · Post by **vicboddy** » Sun Mar 07, 2010 8:42 am

Coming back to your question;where do I get a complete JUpiter exhaust, I need one too so interested in what you find available! Regards V

Alastair Gregg · Post by **Alastair Gregg** » Sat Mar 27, 2010 9:25 pm

JCC and JOAC should have stock by June.

conrod · Post by **conrod** » Wed Jun 30, 2010 9:31 pm

Any news on the Jupiter Exhausts ?
The Jupiter club have no knowledge of them being made

Alastair Gregg · Post by **Alastair Gregg** » Thu Jul 01, 2010 6:44 am

The Pattern has been made and quantities agreed. Sorry I have been so slow but it will take them about 3 weeks to make them. We are a lot closer now than before so "keep the faith"

Greg Jackson · Post by **Greg Jackson** » Sat Jul 03, 2010 10:44 pm

Why not have one made up in s/s

Alastair Gregg · Post by **Alastair Gregg** » Sun Jul 04, 2010 7:59 am

These are S/S

Alastair Gregg · Post by **Alastair Gregg** » Sun Jul 11, 2010 12:46 am

Exhausts have been ordered and we are being quoted 3-4 weeks. I will post again when they are in stock

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