Exhaust Manifold Studs - Rb25Det - Help Please

[GTSBoy]

You don't really torque studs in the head. You just screw them in (until they stop) and the nut that clamps the manifold pulls on both ends of the stud when you torque it up.

[dyl33]

I was just following workshop manual it said torque setting 27-31nm.

The old stud is 53mm long, new one 50mm,

old stud 15mm thread new stud 12.5mm.

So you reckon dont worry about torqueing them

[GTSBoy]

2 hours ago, dyl33 said:

27-31nm

On a 200mm long spanner, that's equivalent to hanging a big bucket of water on the end of the spanner. It's barely more than "done up by your 5 yr old daughter" tight.

[dyl33]

Yeah well with the torque wrench it would not click and was pushing the studs non threaded part deeper into the head, because the stud is 3mm smaller its not reaching full depth. Does that make sense?

Anyway I just did it with a spanner until it starts getting tight.