zaggato1

So I spent hours and have 3 questions:
On my 1982 Porsche 928 I have remove the intake tubes because a shop had them off and never tighten a few of the bolts when replacing.
1. Before I replace them is it necessary to put 120 grit sandpaper on a flat surface and sand down the surface where the gaskets sets?
2. These are dry gaskets correct?
3. What is the torque spec for (16qty) M8 x 35 bolts that hold the intake tube down to the head?
I did try to find these answers on the form but could not find the torque for an 82 and just wanted to confirm the first 2 questions.
thank you

Wisconsin Joe

In order:

1 - Not a bad idea. Depends on how flat they are now.

2 - Yes, dry. At least I think so.

3 - Tech specs show 15 N-M, which is about 11 ft lbs.

zaggato1

Thank you very much, I appreciate the prompt to the point reply.

zaggato1

Would you happen to know what the torque is for the bolts that hold the fuel rails to the intake tubes are?
Thank you