Lotus Elan

water pump shaft, does anyone know the diameter of both ends

PostPost by: Apx » Thu Aug 23, 2018 10:57 am

Just fitting a new water pump supplied and the diameter of the new shaft at the pulley end has increased by .025 on the new pump to 0.502 from 0.475. does anyone know of the original lotus specor can measure the shaft at both ends for me.

Cheers Neal
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PostPost by: djb222 » Thu Aug 23, 2018 1:39 pm

Removed the water pump a short while ago, just measured the shaft dia and it is .502.

I've got a replacement somewhere, if I can lay my hands on it I'll measure it.
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PostPost by: Apx » Thu Aug 23, 2018 2:54 pm

Cheers, the impeller end is indeed 0.5 but the pulley end is what i am after.
IF EVERYTHING SEEMS TO BE GOING WELL, YOU HAVE OBVIOUSLY OVERLOOKED
SOMETHING.
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PostPost by: djb222 » Thu Aug 23, 2018 3:56 pm

Both ends measured the same.

Also the brand new one measures .502 either end of the shaft.
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PostPost by: Elanman99 » Thu Aug 23, 2018 6:46 pm

I've never seen one with anything other than a parallel shaft at 1/2" diameter.

Ian
68 Elan S4 DHC. Built in a weekend from a kit (just like the advert said)
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PostPost by: Apx » Thu Aug 23, 2018 7:23 pm

Thanks you've answered a question and i have brought a new pulley flange, mine is undersize by 25 thou.. The engine appears untouched since the 1970s and is the original engine for the car so i suppose if its not had a water pump and ancillaries since 1983 then thats how it was made.
IF EVERYTHING SEEMS TO BE GOING WELL, YOU HAVE OBVIOUSLY OVERLOOKED
SOMETHING.
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PostPost by: elated » Fri Aug 24, 2018 7:30 am

A hitherto unknown and unexpected instance of weight and cost saving "in the day"?
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