Connecting Rod Nut Torque - Early Models

[dennisv]

What is the correct torque for the connecting rod nuts on a 1970 914-6 (aka 1969 911T)? I have been through the existing thread, but am not seeing our scenario.

* The factory manual says: 5 mkp (49 Nm, 36 ft. Lbs.)
* Wayne Dempsey’s book says: 20 Nm (14.7 ft. Lbs) +90 degrees
* Bruce Anderson’s books says: 37 to 40.5 ft-lb
* There was a Porsche Technical Service Bulletin in 1990 (for some models starting with MY 1978) saying bolts marked “12.9”: 15 Nm (10.5ft lbs), +90 degrees, +90 degrees). They reference part number 964–103-176-00

The part number I bought for new rod bolts was 901-103-172-00 for 1970 914-6 (same as 1965-69 911). They are marked 12.9.

So I have an early MY, with different part number, but marked 12.9. What’s the correct torque?

[gled49]

On old cars I use the old specs, with factory replacement bolts and nuts: 5-5.5 mkp (36-39.8)