I have done the Time-sert on my 1998 STS Northstar-engine. Now installing heads. Regarding to the manual following process have to be done:
1. Tighten head bolts with 30 Nm
2. 60 degrees.
3. Another 60 degrees.
4. Finally last 60 degrees (total of 180 degrees in sequence).
After doing the 3 first steps the bolts are really tight and nearly impossible to pull the last 60 degrees. Is this normal and how hard to pull to get the last 60 degrees?
I checked with my torque wrench that now shows close to 70 Nm, if this can be compared since it is the bolts that are supposted to be stressed with the 180 degress.
1. Tighten head bolts with 30 Nm
2. 60 degrees.
3. Another 60 degrees.
4. Finally last 60 degrees (total of 180 degrees in sequence).
After doing the 3 first steps the bolts are really tight and nearly impossible to pull the last 60 degrees. Is this normal and how hard to pull to get the last 60 degrees?
I checked with my torque wrench that now shows close to 70 Nm, if this can be compared since it is the bolts that are supposted to be stressed with the 180 degress.