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Cooper 'S' Pushrod Identification
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Author:  cooperess [ Fri Sep 08, 2017 8:20 am ]
Post subject:  Cooper 'S' Pushrod Identification

I would like to know how to identify Cooper 'S' pushrods from Mini pushrods or are they all the same?

Author:  Mick [ Fri Sep 08, 2017 8:26 am ]
Post subject:  Re: Cooper 'S' Pushrod Identification

It is not hard to spot once you know. The 1275 pushrods are a different length to 850/998/1100 pushrods in that the 1275 pushrods are a 1/4 inch longer.

Author:  cooperess [ Fri Sep 08, 2017 8:31 am ]
Post subject:  Re: Cooper 'S' Pushrod Identification

Mick wrote:
It is not hard to spot once you know. The 1275 pushrods are a different length to 850/998/1100 pushrods in that the 1275 pushrods are a 1/4 inch longer.
Thanks Mick. Is there any difference in the stem thickness?

Author:  Mick [ Fri Sep 08, 2017 9:07 am ]
Post subject:  Re: Cooper 'S' Pushrod Identification

They have always appeared to me to be identical except for length.

Author:  cooperess [ Fri Sep 08, 2017 9:22 am ]
Post subject:  Re: Cooper 'S' Pushrod Identification

Attachment:
Mini Pushrods 002.jpg
Attachment:
Mini Pushrods 001.jpg
I think I have tagged the pictures correctly. Please tell me if I am wrong.

Author:  Mick [ Fri Sep 08, 2017 9:45 am ]
Post subject:  Re: Cooper 'S' Pushrod Identification

Yes that would be correct.

Author:  Phil 850 [ Fri Sep 08, 2017 8:58 pm ]
Post subject:  Re: Cooper 'S' Pushrod Identification

So, are all 1275 push rods the same shape at the ends as the cooper S.
in other words, there not Cooper S push rods but 1275 push rods ?

Author:  drmini in aust [ Fri Sep 08, 2017 9:42 pm ]
Post subject:  Re: Cooper 'S' Pushrod Identification

I will check my 1275 stock tomorrow.

Author:  Lillee [ Fri Sep 08, 2017 10:56 pm ]
Post subject:  Re: Cooper 'S' Pushrod Identification

Phil 850 wrote:
So, are all 1275 push rods the same shape at the ends as the cooper S.
in other words, there not Cooper S push rods but 1275 push rods ?


I have "1275" pushrods with triangular ends like the bottom one in the above photo. So yes, there are 1275 non S ones.

but they bent after <1000 miles but that's another story...

Author:  drmini in aust [ Sat Sep 09, 2017 9:09 am ]
Post subject:  Re: Cooper 'S' Pushrod Identification

I have 1-1/2 sets of original 1275 non- S pushrods, all look the same as the S ones in above pic. NOT triangular.

After Chong's problem above with new UK ones bending I would consider sourcing competition ones from APT in USA. Expensive but worth it, IMO.

Author:  cooperess [ Sat Sep 09, 2017 9:52 am ]
Post subject:  Re: Cooper 'S' Pushrod Identification

Mick wrote:
Yes that would be correct.
Thanks Mick

Author:  Ian McNeil [ Sun Sep 10, 2017 2:46 pm ]
Post subject:  Re: Cooper 'S' Pushrod Identification

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