7 replies to this topic

[suuper]

Hi,
i am doing an 1275 Engine and need a little advice. I have measured the crank and the big end journals. Haynes say max. 0,025mm for crankshaft ovality. But is this also for the big ends? Max ovality at my crank journal is 0,008mm - fine! At the big ends it is between 0,010 and 0,012mm - which would be good also if the 0,025 applied for the big ends. I want to be sure - thanks for help!
cheers andreas

[Dusky]

0.01-.0.027 for the mains
0.01-0.025 for the big ends in my voor, for 1275 engines (rover manual)

[suuper]

thanks a lot! cheers

[ACDodd]

More important here is the diameter?

Ac

[suuper]

yes - its a green one 12A - that diameters are listet in haynes. at this point everything is ok. and i will check it double with gauges.

but thank you for think twice!

[ACDodd]

Do not use original data to compare the sizes too. You need to go by the data from the bearing manufacturer of the shells you intend to fit.

Ac

[ACDodd]

The minimum size for after market shells (big ends) is usually 1.7504" not 1.7497" as quoted by the manufacturer.

Ac

Edited by ACDodd, 11 March 2018 - 06:57 PM.

[suuper]

ok - thanks - i will spend attention. cheers andreas