desperately seeking timing chain stop 4G MK II

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pauldridge
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desperately seeking timing chain stop 4G MK II

Postby pauldridge » Tue Feb 13, 2018 3:18 am

Some 18 months after my disastrous rod failure on my '53 'sq 4 MK II, it is looking like I am close to getting the engine back together, thanks in part to scoring an undamaged crankcase.

One part is missing, and that is the tensioner blade stop labeled in the Draganfly engine explosion as part number 2119-49. that part is not even listed in the parts list, and a search shows "No longer available")
https://www.draganfly.co.uk/images/shop/14/ohvsqbot.jpg

Just wondering if anyone might have a spare of this part willing to sell, or even lend to me so I can have one fabricated. (spoiler alert.. I am located in the US)
Phil.. Austin TX
Phil Auldridge
Austin, Texas
www.Blog.Auldridge.Org
'53 SQ 4 MK II, '72 Norton Commando, '75 Honda CB400F, '78 BMW R100/7, '79 Honda CBX, 2014 Indian Chief Vintage

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Re: desperately seeking timing chain stop 4G MK II

Postby greg.geonetta » Tue Feb 13, 2018 11:03 am

It's just a L shaped bracket, you could make one easily.
1972 Norton Commando, 1951 Ariel SQ4, 1959 Triumph desert sled, 1973 Moto Guzzi Police, '68 BSA A65, '65 BSA 500 twin, '65 Triumph Bonneville, '78 BMW R100/7

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simon.holyfield
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Re: desperately seeking timing chain stop 4G MK II

Postby simon.holyfield » Tue Feb 13, 2018 11:27 am

There's a picture here:

http://ariel-square-four.blogspot.co.uk ... float.html

You might need to blow it up.
cheers

Simes

'51 Square Four, Masquerading D3 Bantam, '58 Huntmaster, '42 W/NG, http://ariel-square-four.blogspot.com

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simon.holyfield
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Re: desperately seeking timing chain stop 4G MK II

Postby simon.holyfield » Tue Feb 13, 2018 11:29 am

Another here:

http://ariel-square-four.blogspot.co.uk ... -june.html

What happened to the old one?
cheers

Simes

'51 Square Four, Masquerading D3 Bantam, '58 Huntmaster, '42 W/NG, http://ariel-square-four.blogspot.com

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Re: desperately seeking timing chain stop 4G MK II

Postby roger.fellows » Tue Feb 13, 2018 12:42 pm

Depends which one Phil wants. The duplex version is a very different animal with a 4 - 5" curved section on which the chain runs. The earlier part is the small 'T' piece as in your blog, Simon, with the spring steel bearing piece, the 'T' acting only as a stop to prevent too much flex of the strip.
There are photos on the site showing the later part, and I'll try to find mine and put up a photo.

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Re: desperately seeking timing chain stop 4G MK II

Postby roger.fellows » Tue Feb 13, 2018 12:56 pm

Phil, I think I have a spare 2119-49 somewhere. It will be a month or so before I can get to it probably - that is if you really want the part in your post. If you have the duplex set-up I think you need the later, much bigger job.

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Re: desperately seeking timing chain stop 4G MK II

Postby roger.fellows » Tue Feb 13, 2018 1:24 pm

Phil, if you put 'Sq4 Mk1 Timing chain tensioner' into the search box and check out Markus.Nikot's post from Jan 2013 you will see some useful photos including one of the later tensioner and some other information.
Sorry, can't work out how to do a direct 'quote' into this reply.
Last edited by roger.fellows on Tue Feb 13, 2018 2:04 pm, edited 1 time in total.

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pauldridge
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Re: desperately seeking timing chain stop 4G MK II

Postby pauldridge » Tue Feb 13, 2018 1:40 pm

Thanks for all the prompt posts. It does look like fabrication should be simple. And yes it is the simplex setup.

No idea where the old one went. Judging from the half-a***d job tbe previous owner did for the FIRST failure (undisclosed at time of purchase) I woildnt be surprised if he just left it off!
Phil Auldridge
Austin, Texas
www.Blog.Auldridge.Org
'53 SQ 4 MK II, '72 Norton Commando, '75 Honda CB400F, '78 BMW R100/7, '79 Honda CBX, 2014 Indian Chief Vintage

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paul.jameson
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Re: desperately seeking timing chain stop 4G MK II

Postby paul.jameson » Tue Feb 13, 2018 9:24 pm

If you PM my son Rob you will find he has one available for you.
Paul Jameson
36 4G, 37 VH, 53 ex ISDT KHA (project), 54 KH(A), 54 4G Mk IV (project), Healey 1000/4 (project)
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