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Trying to find out definitively if the auto crank is the same as the manual crank, I know the block is different but was led to believe the crankshaft (rods/pistons) is the same, although some people are saying the taper is different. Any ideas/input? Ta!

100% the same


auto 1275's are a great source of std/std cranks as its normally the box that goes wrong

ive bought and stripped loads of them - ive paid as little as a tenner for a 1275 a plus auto on ebay in the past!

Thanks Rich, I thought I was going mad...

That's kind of what I thought, and thats why I've got three dead auto's in the shed!
I've got about 8 998's too that were all going to be weighed in, most with "998 gearboxes"

I seem to remember in the dark recesses of my mind that the early Auto cranks were of the EN40B 'S' type cranks? true or false?

The auto blocks can be converted to manual quite easy and cheaply, I converted one in the early 70s , a couple of holes that need drilling for the oil gallery behind the pump , also a spacer made to fit behind the oil pump as the machining is deeper and use 2 gaskets . The 1275 I convert had a odd engine number so I called in at Kennings ,canklow road, Rotherham , the parts department had a guy work there who new every part from memory, he informed me that it was fitted with liners from the factory, fitted as standard from new !!!!!
Regards
Goff

goff wrote:The auto blocks can be converted to manual quite easy and cheaply, I converted one in the early 70s , a couple of holes that need drilling for the oil gallery behind the pump , also a spacer made to fit behind the oil pump as the machining is deeper and use 2 gaskets .

More details here:
viewtopic.php?f=18&t=5716

There were some early auto cranks that were EN16 and had 1.625" con rod journals. I suspect these often turn into EN40B 'S' cranks after a few pints and a few years. :^)

Kelley