Open valve rocker box 34-37 needed

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mark.prizeman
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Open valve rocker box 34-37 needed

Post by mark.prizeman »

Does anyone have a spare open valve rocker box? In particular the lower casting A5-405 as I appear to have an earlier incarnation of the casting that is machined to take un-flared pushrod tubes; i.e they would just go straight up into the casting, without the flare, rather than sleeving over the suitably cut bosses.
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'25 Sunbeam 5 sports, '37 VH, '50 Magnat Debon M4, '53 AJS 20
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paul.jameson
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Re: Open valve rocker box 34-37 needed

Post by paul.jameson »

You may well find it easier to obtain some pushrod tubes without the splayed ends instead, or to have some made. I used the early arrangement on my 350 engine for a while but changed to the later type to reduce grease leaks if I remember correctly.
Paul Jameson
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ian.scott
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Re: Open valve rocker box 34-37 needed

Post by ian.scott »

Hi
I have a spare lower casting , however it does not have a casting number and the pushrod tube fittings have a flange to fit inside the pushrod tubes.
Let me know if it is any use, butthe casting is bare , no rocker shafts etc but it does have locating screws for the rocker covers.

Ian
mark.prizeman
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Re: Open valve rocker box 34-37 needed

Post by mark.prizeman »

Thank you Ian,

Presumably like this casting; actually a 350, but same joint to tubes?

Mark

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'25 Sunbeam 5 sports, '37 VH, '50 Magnat Debon M4, '53 AJS 20
mark.prizeman
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Re: Open valve rocker box 34-37 needed

Post by mark.prizeman »

Image
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'25 Sunbeam 5 sports, '37 VH, '50 Magnat Debon M4, '53 AJS 20
mark.prizeman
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Re: Open valve rocker box 34-37 needed

Post by mark.prizeman »

Sorry here is missed image!download/file.php?id=30332&mode=view
'25 Sunbeam 5 sports, '37 VH, '50 Magnat Debon M4, '53 AJS 20
ian.scott
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Re: Open valve rocker box 34-37 needed

Post by ian.scott »

Hi Markus
Yes, just like that,
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Re: Open valve rocker box 34-37 needed

Post by mark.prizeman »

Perfect!
'25 Sunbeam 5 sports, '37 VH, '50 Magnat Debon M4, '53 AJS 20
mark.prizeman
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Re: Open valve rocker box 34-37 needed

Post by mark.prizeman »

I have sent a PM for further actions...
'25 Sunbeam 5 sports, '37 VH, '50 Magnat Debon M4, '53 AJS 20
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