Torque Specs Needed For 1993 Skyline Rb25de Er33

[Anthy]

We are rebuilding a 1993 Skyline RB25DE ER33 motor and need the torque specifications for the main bearing caps and conrod caps. There is conflicting information out there does someone know what they are?

[MozzMann]

What size are the Cap bolts as that will tell you all you need to know. but the weird part is there are a LOT of torque setting within engine that are simply used to have the same tension on the retainer's and keep any warping within the block to a minimum.

I would Aim for between 35 to 45 Ft Lbs starting at 20 and working my way up until you on the upper edge at around 40FtLbs which is 54-55nM
realistically this is a good figure for the Mains and 30-35 FtLbs or around 45 nM for the Rods.

I'd make sure the Bearings Caps and bolt threads are spotlessly clean by washing in Shellite and Compressed Air blown clean and dry, a drop of light oil or assembly lube applied and torqued to specs.
The Diagram below will give good usable torque settings. Most of the studs you will be dealing with will likely be 6.8 to 8.8 tensile strength as well .

Bolt Size Pitch mm Head mm Strength Grade 4.6 6.8 8.8 10.9 12.9
3 0.5 5.5 0.51 1.01 1.35 1.90 2.27
4 0.7 7 0.95 1.91 2.54 3.57 4.29

5 0.8 8 2.28 4.56 6.09 8.56 10.3

6 1.0 10 3.92 7.85 10.5 14.7 17.7

8 1.25 13 9.48 18.9 25.3 35.5 42.7

10 1.5 17 19.1 38.1 50.9 71.5 86.8

12 1.75 19 32.6 65.1 86.9 122 146

14 2.0 22 51.9 104 139 195 234

16 2.0 24 79.9 160 213 299 359

Edited April 7, 2015 by MozzMann

[89CAL]

46-52Nm

Click here for bolt torque pattern (just over half way down)