OTS screen mirror rod top boss BD20857

Talk about the E-Type Series 2
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Monkeyfinger
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#1 OTS screen mirror rod top boss BD20857

Post by Monkeyfinger » Thu Jul 14, 2022 9:05 am

Hoping fellow roadster owners can help with checking a measurement? I'm looking to replace the screen tension rod top boss on my car. The repro item I have sourced is some 3mm narrower than the (presumably) original item that is currently fitted. As a result it would require shimming to fit between the lugs fitted at the top of the screen. My original measures 17.1mm across - can anyone check the same dimension on their car?

The part would appear common for S1/S2 cars, so I'm assuming it's just another variable repro item, but I'd like to check. Attached images show the important difference in width. There are othe differences, but this is the most critical with respect to fitting.
Image

Image
Richard
- 1969 Series 2 OTS, family owned 40+ years

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colinevans
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#2 Re: OTS screen mirror rod top boss BD20857

Post by colinevans » Thu Jul 14, 2022 10:25 am

Hi Richard
The internal gap between the lugs on my S2 is 17mm. I think its original.
Cheers, Colin
Colin
Series 2 OTS, 280SL

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Monkeyfinger
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#3 Re: OTS screen mirror rod top boss BD20857

Post by Monkeyfinger » Thu Jul 14, 2022 10:35 am

Perfect Colin, thanks.
Richard
- 1969 Series 2 OTS, family owned 40+ years

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tim wood
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#4 Re: OTS screen mirror rod top boss BD20857

Post by tim wood » Sun Jul 17, 2022 10:29 am

Just as an aside, when I purchased my repro item the threads on the side fixings were wrong and had to be re tapped.
Series 1 FHC purchased 40 years ago. Courted my wife in it.
Series 1 2+2 when the kids were small now sold.
Series 1.5 OTS in opalescent maroon, Californian car. My retirement present.

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#5 Re: OTS screen mirror rod top boss BD20857

Post by Monkeyfinger » Sun Jul 17, 2022 10:37 am

Well, I managed to source another good original part, and it confirms that the repro item is not even close, dimensionally. The threads are correct, but that is about it. The supplier is being very good about it, and will be feeding back to the manufacturer. It still amazes me that a part can be reproduced to a very high quality standard, but with such little regard to the actual fit.
Richard
- 1969 Series 2 OTS, family owned 40+ years

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colinevans
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#6 Re: OTS screen mirror rod top boss BD20857

Post by colinevans » Sun Jul 17, 2022 11:13 am

Hi Richard
I have come across this so many times in my rebuild. Whilst I am grateful that these items are still being made it is so frustrating when you have to retap, weld or re-drill so many items that are so far out, a 5 minute job ends up taking an hour. I now re-use originals whenever they are remotely serviceable even if it takes a bit of time. I share your pain!
Regards Colin
Colin
Series 2 OTS, 280SL

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Fuel.inj
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#7 Re: OTS screen mirror rod top boss BD20857

Post by Fuel.inj » Sun Jul 17, 2022 12:22 pm

It seems to be common in the classic car and motorcycle replacement spare parts arena that the reproduction items are not the same. Surely when the supplier goes out to tender, the exact original spec is what’s s required whether it be to drawings or reverse engineered. It’s not rocket science.
Paul.
1971 S2 FHC (Opalescent Blue)
1990 Mercedes Benz 260E
A number of Nortons.
1939 Triumph T100

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