Author Topic: t35 cylinders  (Read 9820 times)

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Offline Daren W Australia

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t35 cylinders
« on: 17 Jan 2006 at 18:47 »
Hi I have a bunch of t35 cylinders for sale from $50 to $100 each some STD and some oversize in the bore
Regards Daren
too many dougli not enough time!

Offline Daren W Australia

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Re: t35 cylinders
« Reply #1 on: 04 Oct 2006 at 11:23 »
Hi this is still for sale or swap regards Daren
too many dougli not enough time!

Offline t35freire

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Re: t35 cylinders
« Reply #2 on: 08 Oct 2006 at 17:24 »
Hi I have a bunch of t35 cylinders for sale from $50 to $100 each some STD and some oversize in the bore
Regards Daren
Hi Daren;
I bought recently a T35 which cylinders are of different measure, also the pistons that are new but I don't know if there are original. Curiously the cylinders are reĀ“sleeved, taking in mind the thin wall, but walls are intact.
What are the sizes of the cylinders, and if you have the pistons, please tell me.
Regards, Hans.

Offline alwyn

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Re: t35 cylinders
« Reply #3 on: 09 Oct 2006 at 05:41 »
Hi all,
Hans, it's been my experience that sleeved Douglas cylinders have failed - my original Mark III bought c 1950 was bored and sleeved - the wall of the cylinders where projecting into the crankcase finished up being very thin - this lead to cracking of that part of the cylinders - the cracking extended around the cylinder/crankcase bolts rendering the barrels completely unserviceable and irreparable.

Alwyn
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Offline Doug

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Re: t35 cylinders
« Reply #4 on: 10 Oct 2006 at 00:34 »
I reckoned if I had to sleeve a post war cylinder barrel, I would need to make a double diameter sleeve. The lower portion would have an increased diameter to completely replace the cylinder spigot. Getting the material would be a difficulty, as it would be unlikely to find a commercially available liner with a thick enough wall to make such.

-Doug

Offline t35freire

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Re: t35 cylinders
« Reply #5 on: 10 Oct 2006 at 12:24 »
Hi all,
Hans, it's been my experience that sleeved Douglas cylinders have failed - my original Mark III bought c 1950 was bored and sleeved - the wall of the cylinders where projecting into the crankcase finished up being very thin - this lead to cracking of that part of the cylinders - the cracking extended around the cylinder/crankcase bolts rendering the barrels completely unserviceable and irreparable.

Alwyn
Hi Alwyn;
Thank you for your help. Slowly I learn to know the singularity of the Douglas. In this case I wait the response of Daren, offering cylinders in some sizes. A lot of job wait me, but is my hobby and I'm enjoyed and greatful to all the members of this net.
Regards, Hans.

Offline t35freire

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Re: t35 cylinders
« Reply #6 on: 10 Oct 2006 at 12:28 »
I reckoned if I had to sleeve a post war cylinder barrel, I would need to make a double diameter sleeve. The lower portion would have an increased diameter to completely replace the cylinder spigot. Getting the material would be a difficulty, as it would be unlikely to find a commercially available liner with a thick enough wall to make such.

-Doug
Hi Doug;
As my reply to Alwyn, I'm very greatful to you for your help. I must re-think what I do with the cylinders; perhaps the best is forget it and buy another that aren't re-sleeved.
Regards, Hans.

Offline Daren W Australia

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Re: t35 cylinders
« Reply #7 on: 11 Oct 2006 at 09:20 »
Hi Here are 6 T35  cylinders I have left to part with
1 61.3mm top fin chipped
2 60.8mm fin 1 and 3 chipped
3 60.8mm good fins
4 60.8mm top fin chipped
5 61.5mm top fin chipped sleeved  and 2 corners of the base are brazed on
6 61.5mm chipped top fin

email me for photos
 
Regards Daren :)
too many dougli not enough time!

Offline alwyn

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Re: t35 cylinders
« Reply #8 on: 11 Oct 2006 at 13:09 »

5 - 61.5mm top fin chipped sleevedĀ  and 2 corners of the base are brazed on
 
Regards Daren :)

That's interesting - kind of vindicates my earlier comment regarding cracking after sleeving - apparently I'm not the only one to have experienced this problem.

Alwyn
Quotable Quote - "640 k should be enough for anybody"! - Bill Gates - 1981.

Offline Doug

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Re: t35 cylinders
« Reply #9 on: 12 Oct 2006 at 03:09 »
Quote from: Alwyn
...apparently I'm not the only one to have experienced this problem.

No, one of the door-stops that came with my Mark 3 had been re-sleeved, where they have split the remaining (very) thin wall skirt. To add insult to injury, instead of using a cast iron liner, they used a bit of large diameter mild steel exhaust tubing. Still with the standing weld seam intact on the inside! I was able to find a pair of barrels good for another re-bore, so did not need to carry out a salvage operation.

-Doug

Offline Daren W Australia

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Re: t35 cylinders
« Reply #10 on: 12 Oct 2006 at 08:49 »
Hi here are pics of the ugly barrel.
Regards
Daren



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« Last Edit: 12 Oct 2006 at 11:38 by alwyn »
too many dougli not enough time!

 

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