S65 oil pump torque settings

[H8rna]

Hi all I’m in the process of rebuilding my m3 s65 engine after it spun a rod bearing I’ve replaced the crank and on rebuilding I’ve stripped the oil pumps and cleaned out but can’t find the oil pump bolt torques that connect the two half of the pump together and also the Allen head oil pressure release valves torques I’ve tried Googling and can’t find anything and tried downloading newtis and ista to no joy so any help would be much appreciated

[remi34000]

Originally Posted by H8rna

Hi all I’m in the process of rebuilding my m3 s65 engine after it spun a rod bearing I’ve replaced the crank and on rebuilding I’ve stripped the oil pumps and cleaned out but can’t find the oil pump bolt torques that connect the two half of the pump together and also the Allen head oil pressure release valves torques I’ve tried Googling and can’t find anything and tried downloading newtis and ista to no joy so any help would be much appreciated

I'll watch tomorrow if you still need it.

[deansbimmer]

According to BMW the oil pumps are not serviceable components, so you won't find these specs listed in BMW repair instructions. They are replaced if faulty. You can usually go by typical torque specs for their associated thread sizes.

[djsilverjohnson]

The first link is for entertainment only, unless you're interested in learning how to calculate torque values;

https://www.eng-tips.com/faqs.cfm?pid=725&fid=536

The second link is a torque chart from a Mopar related website. No reference to where the values came from;

https://www.allpar.com/threads/torqu...teners.236660/

The third link is the most interesting. NASA has actually tested to measure the amount of torque required to strip the parent material threads in 6061-T6, 2024-T6 and 7075-T6 with various thread depths. The stated purpose was to develop a torque chart to replace their "hand tight" or "wrench tight" instructions for non-critical components. The only shortcoming is that it doesn't include A356-T6 Aluminum, which is most common for cast parts. The metric charts start on page 219;

https://ntrs.nasa.gov/api/citations/...0170003491.pdf