e30 m20 2,5

[mikep 0]

could sum one tell me how tight u do them to have new studs

[Matty104 0]

Step 1 : 30nm then leave for 20min

Step 2: Tighten 90 degrees

Step 3: warm engine to operating temp then tighten another 90 degrees

[brad91 0]

That sounds like a lot of work lol. So you cant torque down the head with it out of the car? Im assuming that you should be able to get the the head bolts with the cams still in? And is this the same on a b20?

[*Glenn* 855]

Step 1 : 30nm then leave for 20min

Step 2: Tighten 90 degrees

Step 3: warm engine to operating temp then tighten another 90 degrees

Thats not quite right Matt...it's :

Step 1 : 30nm

Step 2: Tighten 90 degrees

Step 3: Then another 90 degrees

And you must use new head bolts as well as new gaskets

Edited December 4, 2010 by *Glenn*

[brad91 0]

Was gona say that sounds like a pain lol. Put motor together, run motor, pull motor apart, tighten, put motor together :S

I would have thought it would just be a specific torque setting though?

[Matty104 0]

ahhh my mistake Glenn, got mixed up between hex bolts and torx,

Hex was

40nm

60nm after 15-20min

25nm after 25min of running

and torx was how Glenn said

[No name user 379]

the m20's ive done i used m10x1.5 100mm long capscrews works a treat and far better than stock, pull them down to 65 ft/lb