Redneck Truck
Gone, but not forgotten
- Joined
- May 3, 2009
- Location
- Plano, TX
- TDI
- 2008 Touareg V10, 2001 Audi TTQ Roadster TDI 6-speed, 2005 Jetta Wagon TDI 6-speed
I feel silly for even asking, but I've removed bolt #1 and installed stud #1, and I'm not sure how a torque sequence works when I'm replacing one bolt at a time, given there are three passes on the torquing.
1. remove all bolts, replace with studs, then install nuts and torque in 3 passes. ruin existing head gasket, allow coolant to flush into cylinders.
2. remove one bolt, install one stud, install nut, torque to 80#. repeat. this way, the effective clamping force holding the head to the block and squeezing the gasket is reduced from stock clamping to 80#, then raised back to 125%
3. remove one bolt, install one stud, torque to 80, then 100, then 125, repeat. In this case, I don't know what the purpose is of three separate torque phases.
4. some combination of the above. after installing all and torquing all to 80 or 100, then do one last pass at 125, etc.
Any thoughts on this? I'm literally halfway through the job and didn't think to seek clarification until now. Thanks to anyone who can help!
1. remove all bolts, replace with studs, then install nuts and torque in 3 passes. ruin existing head gasket, allow coolant to flush into cylinders.
2. remove one bolt, install one stud, install nut, torque to 80#. repeat. this way, the effective clamping force holding the head to the block and squeezing the gasket is reduced from stock clamping to 80#, then raised back to 125%
3. remove one bolt, install one stud, torque to 80, then 100, then 125, repeat. In this case, I don't know what the purpose is of three separate torque phases.
4. some combination of the above. after installing all and torquing all to 80 or 100, then do one last pass at 125, etc.
Any thoughts on this? I'm literally halfway through the job and didn't think to seek clarification until now. Thanks to anyone who can help!