Sunbeam Imp Sport OGP933P

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The Nun
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Re: Sunbeam Imp Sport OGP933P

Post by The Nun »

willsrings wrote:
Fri May 22, 2020 9:51 am
Its a miracle!
Resurrected transaxle in record time😀
Cheers Dave!
I see Daves stamped his number on it, he's done over 9 million gearboxes now by the looks of it :o
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willsrings
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Re: Sunbeam Imp Sport OGP933P

Post by willsrings »

Around 8 million have been mine😂
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Re: Sunbeam Imp Sport OGP933P

Post by 617sqn »

he's done over 9 million gearboxes now by the looks of it
You stupid boy, Pike. :roll: :lol:

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Re: Sunbeam Imp Sport OGP933P

Post by Impecunious »

It sometimes feels like 9 million Peter... :?

The first two digits are the year the transaxle was first built.

Mark managed to avoid a major disaster by stopping in time. The crownwheel and pinion were not a pretty sight but the close ratio gear cluster was fine. With the iron filings everywhere though, much time was spent cleaning everything in the wash tank. The box of bits on the left of the last picture show the items replaced - cwp, crownwheel bolts, diff gears (not due to the oil problem though), pinion head and tail bearings, input 6204 roller, input oil seal and the usual sundries. Recalculated shims, washers and preloads and it was a Proper Job (which I had when I got back last night 8) ).

Box arrived by carrier on Wednesday lunchtime and it was back in Mark's hands on the M5 about 4pm yesterday (Thursday). Not quite a record, but close...

Dave W.

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willsrings
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Re: Sunbeam Imp Sport OGP933P

Post by willsrings »

All seems good Dave. With aarons help got the engine back in and running in 23mins :D Quick test drive and smiles all round :D

Brakes not what they should be car stops ok but too much pedal travel despite a couple of bleeding sessions. Curiously the pedal doesnt get harder if you continue to press so I am wondering now if the rebuilt 0.7 Master cylinder may be weak :?:
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Re: Sunbeam Imp Sport OGP933P

Post by imporium »

willsrings wrote:
Fri May 22, 2020 9:51 am
Its a miracle!
Resurrected transaxle in record time😀
Cheers Dave!
It must have been helped by all those bottles of "Proper Job" in the crate Mark ... :D 8) :lol: :lol: :roll:
" Keeping the Imp Alive & Kicking & Imp Club Parts support with discounted Parts Supply"
http://www.malcolmanderson.co.uk
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willsrings
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Re: Sunbeam Imp Sport OGP933P

Post by willsrings »

I wish, cant get it myself now as the brewery shop has been closed!
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Re: Sunbeam Imp Sport OGP933P

Post by Impecunious »

That's good to hear Mark.

Have you bled the brakes with the shoes wound out to the drums to eliminate any cylinder movement? Any inverted 'U's in the pipework to trap air? Does it have the original servo?

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Re: Sunbeam Imp Sport OGP933P

Post by bazzateer »

Personally I would just fit a new one, not expensive and these have worked fine for me.
https://www.compbrake.com/product/maste ... 70-remote/
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Re: Sunbeam Imp Sport OGP933P

Post by The Nun »

bazzateer wrote:
Fri May 29, 2020 10:13 am
Personally I would just fit a new one, not expensive
It's got the UK flag on it so you can't go wrong can you? 🤭
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willsrings
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Re: Sunbeam Imp Sport OGP933P

Post by willsrings »

Thanks for the link; think I will order one anyway as handy to have a spare :roll:

No servo and pipe work has no obvious air traps; yes wound in the rear brakes tight to the drum and removed front calipers and tried to ensure the bleed nipple is as vertical as possible. Also tried pressure bleed.
I just dont remember there being such pedal travel.
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Re: Sunbeam Imp Sport OGP933P

Post by The Nun »

Discs give you more travel than drums anyway I found that, it's probably because the pads move back more than the shoes when working then it needs more fluid to push them forwards onto the disc next time you brake, you get used to it though and silicone fluid gives a slightly more springy feel to the pedal than normal fluid too.
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willsrings
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Re: Sunbeam Imp Sport OGP933P

Post by willsrings »

True re discs and volume of fluid required to move them. Just feels disconcerting and not how I remember it being. They are Fiesta calipers and discs which admittedly I havent used before as I had a different disc set up on the competition cars. Fluid is Castrol race SRF.
Re the pads moving back; pads get knocked back when driving as the disc is rotating but at standstill when bleeding the pad will be hard against the disc do the pedal should then be good. However even after repeated brake applications the brake travel still seems long.
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