Sunbeam Imp Sport OGP933P

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willsrings
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Sunbeam Imp Sport OGP933P

Post by willsrings »

I am back after five years away from the Imp forum! But more importantly the Imp is coming back too :D
A light restoration over the last few months;
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Re: Sunbeam Imp Sport OGP933P

Post by Impecunious »

Looking nice Mark. Productive use of the lockdown. Shout if you need any bits 8)

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Re: Sunbeam Imp Sport OGP933P

Post by bazzateer »

Nice colour!
If I told you I was a pathological liar, would you believe me?
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willsrings
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Re: Sunbeam Imp Sport OGP933P

Post by willsrings »

Impecunious wrote: ↑
Fri Apr 17, 2020 11:28 am
Looking nice Mark. Productive use of the lockdown. Shout if you need any bits 8)

Dave W.

Clan003
bazzateer wrote: ↑
Fri Apr 17, 2020 12:14 pm
Nice colour!
Thanks both.
Dave , I do have a bit of a memory test for you; gearbox under my garage bench that had the Quaife diff replaced with standard has a plastic bag with two large circlips for the screwed adjusters.....dont suppose you can remember setting the backlash and these were sent on afterwards to just clip in??!!
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Re: Sunbeam Imp Sport OGP933P

Post by Dave Dickinson »

Hi Mark

Welcome back
As you have also just rejoined the Imp Club I have moved you from the Inactive registered user group back into the Imp Club member group so now you can see the whole forum.

Dave
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Re: Sunbeam Imp Sport OGP933P

Post by Impecunious »

Now that is a memory test at my age Mark :?

I can't actually remember, but it is unlikely I would have left the box with you without having set the backlash. The best way to tell is to turn the box upside down, remove the inspection cover and move the output spiders gently back and forth (both in the same direction each time) whilst watching the gap between the cwp teeth. There should be the slightest gap (about 4 thou) that you can also feel as you rock the shafts. Do this all around a 360 degree rotation and the gap should be consistent with no binding tight spots.

Atb,

Dave
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Re: Sunbeam Imp Sport OGP933P

Post by 617sqn »

Welcome back, Mark. Is that there Bunny Girl known to you ? πŸ‡πŸ€”

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Re: Sunbeam Imp Sport OGP933P

Post by willsrings »

Thanks Dave, will have a look tomorrow. Great advice as always 8)
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Re: Sunbeam Imp Sport OGP933P

Post by willsrings »

617sqn wrote: ↑
Fri Apr 17, 2020 5:41 pm
Welcome back, Mark. Is that there Bunny Girl known to you ? πŸ‡πŸ€”

Andy G
Of course :!: :D
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Re: Sunbeam Imp Sport OGP933P

Post by Lotus-e-Clan »

Forum is almost like old times! :D

Must be nice and quite down there without emmets.

This time of year I recall a step-up in visitors with a lot of Europeans (many Dutch/German IIRC) amongst others flooding honey spots in Cornwall (at least t'was true when I lived in Truro during late seventies/early eighties). Spring in Cornwall is truly fabulous. 8)
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Re: Sunbeam Imp Sport OGP933P

Post by Impecunious »

Yes, Pete; I'm suffering Proper Job withdrawal symptoms for one. My daughter is studying in Falmouth/Penryn and I haven't been down to Kernow in over a year for one reason or another. With the lockdown, it looks like the Betty Stogs and Spingo will have to wait a while yet :?

Living in Saltash in 1973 is a long time ago for me... :(

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Re: Sunbeam Imp Sport OGP933P

Post by Lotus-e-Clan »

Yes Falmouth is booming compared to Truro 'cos of the success of the college. Very disappointed with the ghostly state of Truro last year ...Falmouth was full of youngsters and buzzin' in comparison.

Waiting for the Lottery win so I can buy a nice waterside property somewhere like Restronguet, Flushing or maybe on the Helford River! Fat chance hey!

At least you should be able to visit her later this year. Last year I booked a cottage for Christmas 2020 in St Ives ...still hoping to go...fingers crossed! :) Clan004
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Re: Sunbeam Imp Sport OGP933P

Post by willsrings »

Lotus-e-Clan wrote: ↑
Fri Apr 17, 2020 11:00 pm
Forum is almost like old times! :D

Must be nice and quite down there without emmets.
Feels like we are in a bubble down here right now with a crazy world spiralling around us. We are fortunate to have space around us and plenty of distractions 8)
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Re: Sunbeam Imp Sport OGP933P

Post by Impecunious »

Yes Peter, I'm certainly missing my Proper Job sessions on the floating pontoon at the Pandora Inn :cry:

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Re: Sunbeam Imp Sport OGP933P

Post by Lotus-e-Clan »

OoooH yes the Pandora! :D
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Re: Sunbeam Imp Sport OGP933P

Post by willsrings »

More Covid distraction, few more bits back in place and not too far off coming back off the stands.
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Re: Sunbeam Imp Sport OGP933P

Post by Dave ' Linwood ' Lane »

What a great colour :)
Formally known as " Noddy "
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Re: Sunbeam Imp Sport OGP933P

Post by Lotus-e-Clan »

Dave ' Linwood ' Lane wrote: ↑
Mon Apr 20, 2020 6:31 pm
What a great colour :)
Yes ..the black highlights/trimmings will work with this too! 8)
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Re: Sunbeam Imp Sport OGP933P

Post by willsrings »

Lotus-e-Clan wrote: ↑
Mon Apr 20, 2020 6:41 pm
Dave ' Linwood ' Lane wrote: ↑
Mon Apr 20, 2020 6:31 pm
What a great colour :)
Yes ..the black highlights/trimmings will work with this too! 8)
You mean the bluetac attached cardboard cutout NACA duct!! I have been wondering about adding one to feed cold air to the carbs but most advice has been that it may not work in this position.
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Re: Sunbeam Imp Sport OGP933P

Post by The Nun »

Is that what it is, I thought it was an arrow, "Enter Here" 😝
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Re: Sunbeam Imp Sport OGP933P

Post by Lotus-e-Clan »

Well yes the black (simulated) duct does look good on the orange :) ...but also it was with references to Dave's Readers' Car thread where he recently painted the door frames black on his foam grey Imp and he wasn't 100% sure about the effect - so he asked for opinions.

It was Dave that said he like the colour of your car..so I just tied the two together having noticed the cool black duct... in order to endorse/support his final decision to go with the black trim/highlights.

I haven't explained that well, have I? :oops: :lol:
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Re: Sunbeam Imp Sport OGP933P

Post by willsrings »

Good and bad news!
Its up and running fine.

But forgot to fill the gearbox with oil in my hurry to get it out and up the road!! Managed to run up and down the local hill twice with a stop of 10 mins in between before realising!

Probably a mile in total. Only ran gently in first and second so suspect bearings are fine but diff would probably have been dry :o Casing felt hot but probably no hotter than after a good run ; too hot to hold your hand on.
Pissed off is an understatement.
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Re: Sunbeam Imp Sport OGP933P

Post by Impecunious »

Oh sugar :?

Let me know if there are any nasties on the next drive Mark.

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Re: Sunbeam Imp Sport OGP933P

Post by willsrings »

Cheers Dave. I am just going to fill it with oil(!) and drive it and see. I suspect the diff was dry as being the biggest problem and possibly the output driveshaft seals.
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Re: Sunbeam Imp Sport OGP933P

Post by Lotus-e-Clan »

Oh dear. If it's any consolation you are not the only one to overheat the tranny.

I used my close ratio straight-cut box (strengthened by Dave W) on 25 mile runs which included long periods over 6000 rpm and a few minutes blasts @ 8250 - ie with only a 12.5 mph top gear I regularly revved the goolies off the input shaft bearings within the tranny. I did this daily with no apparent issues until I fitted a flat floor to the Clan which extended each side of the tranny .... hence it reduced the air flow around the box. All OK for miles at over 6000 rpm until during an uphill 8250 rpm blast the tranny raised it's voice even more than usual (straight cut 4th gear scream) ie it sounded 'tight'. I backed off to let it cool and it recovered. I've since allowed for more air around the tranny and I seem to have got away with it...ideally I should fit a pump and oil cooler to the box.

OK, unlike you, I had oil in the tranny but I guess you will know if you'd taken it too far once you get oil in it and give it another run. Fingers crossed. Clan004
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Re: Sunbeam Imp Sport OGP933P

Post by willsrings »

Thanks Peter, have to pick up some oil from Halfords tomorrow and give it a go. Not my preferred vendor but slim choice for tomorrow here in Cornwall.75/80 fully synth.
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Re: Sunbeam Imp Sport OGP933P

Post by Impecunious »

As you haven't refilled it yet Mark, jack the car up and remove the inspection cover under the diff. You will be able to look at the cwp teeth with a torch to see if they have been scored or not. Run your finger around the inside bottom of the box and hope it doesn't come out silvery... :?

Watch you don't cut your finger on the alloy edge of the hole.

I use about two tablespoons of oil as an assembly lubricant so you may have been lucky.

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Re: Sunbeam Imp Sport OGP933P

Post by willsrings »

Yep, will do that Dave.
It had been run previously so their would have been a thin coating of oil on the bearings etc but wasnt sure about the diff as that was added later. Although I did look at the diff I didnt pay too much attention to how coated with oil it was.

Fingers and everything else crossed :!:
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Re: Sunbeam Imp Sport OGP933P

Post by willsrings »

Took the inspection cover off. Not too bad, not much to see on the cover itself, the bright spots in the photo are just marks on the cover. There is some silver evident in oil residue though. Teeth look ok but cant say from my limited experience.
I guess best to remove bellhousing and wash out diff casing.
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Re: Sunbeam Imp Sport OGP933P

Post by willsrings »

More pics
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Re: Sunbeam Imp Sport OGP933P

Post by 617sqn »

It certainly looks a bit "dry". 😬

Good luck with it. Hope it's OK...

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Re: Sunbeam Imp Sport OGP933P

Post by Impecunious »

You've got some scoring on the teeth Mark but it doesn't look terminal. You may have a little more noise from the box than it should have, but the proof of the pudding and all that...

Wipe around the inner bottom of the box as best you can to get out as much of the particle material as you can.

See how it feels and sounds after you run it a while with oil in.

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Re: Sunbeam Imp Sport OGP933P

Post by willsrings »

Cheers Dave.
Decided to remove the bellhousing in situ. Had to grind down some spanners to fit those nuts!!
Pinion bearing looks a little blue but again not used to looking at them. Also better view of the cwp.
Not too much swarf but definitely present.
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Re: Sunbeam Imp Sport OGP933P

Post by Impecunious »

Oh, that's not good. The pinion teeth look a lot worse than I'd thought. There are 34 crownwheel teeth and only 7 pinion teeth so the pinion comes off worse in these cases.

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Re: Sunbeam Imp Sport OGP933P

Post by willsrings »

Glad I looked then.
Probably means gearbox out for repair; doesnt seem worth putting back thenπŸ˜•
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Re: Sunbeam Imp Sport OGP933P

Post by Impecunious »

Unfortunately, yes. The new pinion head bearing is blued because of the preload on it after being rebuilt. The new tail bearing will probably be worse because of fewer rollers and a steeper race angle. They have generated a lot of heat :(

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Re: Sunbeam Imp Sport OGP933P

Post by willsrings »

The transaxle is now in a coffin πŸ˜…
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Re: Sunbeam Imp Sport OGP933P

Post by Impecunious »

Raise a glass to the resurrection.... 8)

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Re: Sunbeam Imp Sport OGP933P

Post by willsrings »

Its a miracle!
Resurrected transaxle in record timeπŸ˜€
Cheers Dave!
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Re: Sunbeam Imp Sport OGP933P

Post by Lotus-e-Clan »

Crikey that WAS quick! :shock: Clan004
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