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Main bolts are 38ft/lbs or 53NM.

Conrod is 12ft/lbs or 16NM then tighten an additional 60-65 degrees.

Funnily enough I just did all this last night. I dont have a protractor or angle wrech so I just marked on the rod cap where 1 corner of the nut was after the initial 16NM and then just turned it until the next corner lined up with that mark. Oddly enough, it ended up being the same as the main bolts after that extra 60 degrees. Tested it on the next one and 38 ft/lbs took it around 60 degrees or thereabouts.

Hi Michael,

Thanks for your reply. This is the same info I had but I guess being old school it didn't sound tight enough to me. The plus 60 deg. part gets me too but I can see where you're going with it and it sounds good to me. Just makes me question why it can't just have a torque setting as at the end of the day they will still be tighten up all the same.

Once again, thanks for the feedback. I'll get on with my rebuild now.

Regards,

Denis

43ft/lbs to achieve the 60 or 65 degrees?? I may need to go and nip them up another 5 ft/lbs each if thats the case. I was considering buying one the other day, but it would have put the assembly bit off even more. Probably a good idea to get one!

Thanks for the clarification though :( Hopefully Denis has taken note of what you said before assembling his bottom end.

  • 4 weeks later...

Hi. I also wonder how much torque is needed for the rod bolts on RB25DET.

I found this on a other site, is that right?

1) Apply engine oil to the conrod bolts and nuts bearing surface.

2) Tighten to 14-16Nm or 1.4-1.6Kg-m.

3) Place alignment marks to the nuts and the conrod cap (eg white paint etc) in one direction (if using the protractor).

4) Additionally tighten 60-65 degrees.

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