Big end and Main Bearing Bolt Torque Figures

[willn]

Hi,

Can anyone confirm the torque settings for the big end and main bearing bolts on a Series one 1.3S (303) engine I am currently building? Technical data says:

Main bearing bolts 4 - 4.5 m kg or 29.4 - 33 ft lbs which seems low.

Big ends 3.5 - 6 m kg or 25.7 - 44 ft lbs which is quite a wide range. I seem to recall around 40 ft lbs is around the right figure.

Thanks

Regards

Will

[Zsport1.3]

Will
My data is contradictory - and my ancient photocopied workshop manual isn't entirely helpful as the figures for the crank are illegible - could be an 8 or perhaps a 3, or even a 5. (Although big ends are clear)

This what I have:- Big end nuts 5.5kg/m. Main bearing cap nuts 4.5 kg/m (this is from the Palgrave Technical Data books of the time). It is not often that the mains are torqued to a lower figure than the big ends and I cannot verify this from the workshop manual but the big ends are also 5.5kg/m in the shop manual.

Unfortunately when I look at the specs for some of the other Fulvia engines the figures are exactly reversed!!! And to make it worse under some models the Mains are listed as 8kg/m which is 60 lbs/feet. Does anyone have a legible copy of the Lancia manual?

I also feel that 30 lbs/ft is low for the mains.

[willn]

Thanks for the reply.

For main bearings the technical data says 4 - 4.5 m kg for bolts (which I assume means 1300 engine since the main bearing caps have bolts) and 8 m kg for nuts (which I assume means 1600 engines as 1600HF crankcases have studs with nuts)

Again on the big ends, the 1600HF big ends are probably in the higher range, but the technical data I have isnt specific about which value to use for which engine type.

However 5.5kg/m is 40 ft lbs which agrees with what I recollect was the figure for big ends - what I'm not 100% certain about is whether that's for 1300 or 1600 engines.

Regards

Will

[Rick]

FWIW, usually a wide range is given for casellated nuts to allow for aligning the cotter pin

[lancialulu]

The big manual akss what casting number on conrod as some are 5.5 and some are 4.3 and 818000 engines are lower still. Mains for 1300 seem to be 5.

Tim