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All alloy push rods

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HiI am building an engine for my Dommie 99 from a box of bits. In this box are many sets of push rods and I have attached an image of a set of all aluminium ones. I haven't seen these before and am wondering if they would be ok to fit. I am not looking for extra speed, but they do look in good condition and your views as to whether or not I should fit them would be appreciated.The engine I am rebuilding is for a 1965 model.All the best PeterAttachments s5005599-2-jpg
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Several points to mention when using the all alloy pushrods.

Firstly............ there are two different lengths available. Those for spigotted barrels and those for non-spigotted. There is only a 0.10" difference but this can be just enough to swallow up the all spare adjustment at the valve end.

Secondly.....If you get them wrongly positioned when lowering the cylinder head in place, the top cups break very easily.

Third.....they are generally twice the weight of standard rods due to being solid and not hollow.

Attachment shows list of models and relevant pushrods.

Attachments norton-heavy-twins-push-rod-sizes-jpg
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Peter. I agree with Phil about the ali rods; they are a bit weak.

If, once you have selected the pushrods you will use from your many sets, I would be very happy to buy a set of standard pushrods, provided they are 8.21" inlets and 7.36" exhaust, if you would be interested in coming to a suitable arrangement? you can either reply on here, or send me a private message through the forum.

Many thanks. Ian

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Hi Ian and Phil.

Taking what you have said into account I will use the standard push rods.

At the moment I will hold onto the remaining push rods as I believe I have enough spares to build two or even three more engines Once I have done this I will sell what ever parts I have left.

Thanks again for your help Peter

 


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