h.e torque specs, need a number Options

[nycchef]

so after 2 weeks of pretending that i don't own a 914, i am goin to try to get it running again. finally got new valve adjustment screws (fed-ex lost em for a while). i need to know how much to torque down the nuts on the h.e's ( if i strip a stud i will kill myself)

[Cevan]

I don't believe any torque spec is in the Haynes manual. I thought that the exhaust studs were torqued to 14 or 14.5 ft/lbs (because they're going into aluminum and the copper nuts that hold the HEs on were 12 ft/lbs.

Someone please render a decision.

[jk76.914]

I don't believe any torque spec is in the Haynes manual. I thought that the exhaust studs were torqued to 14 or 14.5 ft/lbs (because they're going into aluminum and the copper nuts that hold the HEs on were 12 ft/lbs.

Someone please render a decision.

(IMG:style_emoticons/default/agree.gif) That's right. M8 into aluminum is only 14 ft-lbs. Remember that though the nut is steel (copper-plated only!) the torque is distributed down the length of the stud, and the other end goes into aluminum.

I have the Bentley manual for VW T4, and it states 14 ft-lbs also, IIRC.

Interestingly, M9 into aluminum is about 17 ft-lbs, which is about the same as M8 into steel, so if you're running 9mm/8mm step studs, both ends can handle 17 ft-lbs, and you can go a but tighter.

Someone correct me if I'm wrong, but didn't the 1.8 came from the factory with the 9mm/8mm step studs. My theory is that this was part of the reason. Similarly, the rocker studs are 8mm/7mm step studs, with the big end going into the aluminum head- same reason? Who knows!

[nycchef]

I don't believe any torque spec is in the Haynes manual. I thought that the exhaust studs were torqued to 14 or 14.5 ft/lbs (because they're going into aluminum and the copper nuts that hold the HEs on were 12 ft/lbs.

Someone please render a decision.

(IMG:style_emoticons/default/agree.gif) That's right. M8 into aluminum is only 14 ft-lbs. Remember that though the nut is steel (copper-plated only!) the torque is distributed down the length of the stud, and the other end goes into aluminum.

I have the Bentley manual for VW T4, and it states 14 ft-lbs also, IIRC.

Interestingly, M9 into aluminum is about 17 ft-lbs, which is about the same as M8 into steel, so if you're running 9mm/8mm step studs, both ends can handle 17 ft-lbs, and you can go a but tighter.

Someone correct me if I'm wrong, but didn't the 1.8 came from the factory with the 9mm/8mm step studs. My theory is that this was part of the reason. Similarly, the rocker studs are 8mm/7mm step studs, with the big end going into the aluminum head- same reason? Who knows!

i torqued them down at about 15 lbs (tough to be accurate stuffed under the car), ran it for an hour nothing flew out of the valve train. just might get it off the jack stands this week (IMG:style_emoticons/default/driving-girl.gif)