I have to re-install my head on a 1999 A4 1.8t Quatro tomorrow. I found the torque specs (30 ftlbs, + 90 degrees, +90 degrees) but I couldn't find the pattern. Can I just alternate sides or do I have to skip bolts or start in the middle?

 

Ignore the underscores, and orientation (front/back) doesn't matter. The semicolons are the bolts. Basically just starting from the center and working out in a criss-cross pattern. This is also how you should do intake manifolds, exhaust manifolds, etc. Oh, and do this in 2 or 3 stages. Don't fully crank them down one at a time. Get them all pretty tight and then go over again to their final torque spec.

10__4__2___6___8
:___:___:___:___:
7___5___1__3___9

 

It's actually supposed to be torqued to 30 ft/lbs, let the car get to running temp, then retorque to 45ft/lbs if I remember correctly. The 90 degrees your looking at is the torqueing angle.

 

So its not...torque all to 30 lbs then come back and tighten each one 90 degrees twice?

 

Step 1 = 60 Nm
Step 2 = additional 1/2 turn using rigid wrench (180° is equivalent to two 90° turns)


that is all

 

Tightening torques

Component Tightening torque
Intake manifold brace to intake manifold 20 Nm
Intake manifold brace to bracket 20 Nm
Turbocharger to exhaust manifold 35 Nm
Turbocharger bracket to turbocharger (bolt and washer assembly M8) 40 Nm

Turbocharger bracket to cylinder block 45 Nm
Retainer straps for oil supply line to cylinder head 20