1600 (R16) torque spec in reassembling cylinder head Rocker Tower needed

[SP3]

Having some difficulty in locating the torque spec for reassembling the Rocker tower to cylinder head - those 4 bolts.

My service manual does not provide, only specs on the Head bolts.

Can anyone provide what that value is for the Tower bolts. Assumption is working from center 2 outward. Is there a multiple pass method required like with the Head bolts?

Maybe over-complicating but securing part into aluminum and poss impact to accurate valve clearance.

Thanks

[Nissanman]

What engine specifically?

[SP3]

Updated re. which engine

[Nissanman]

My SP311 Service Manual is very explicit, it says ".....until they are all tight".

[amazgjoe]

Service manual says 30-35 Ft lbs on page 31 These are the four Nuts, not bolts

[keith0alan]

In the aluminum heads these seem to be prone to failure. If the threads in the head pull out when torqued install a helicoil and you will be good to go. I have done a number of them and seen more.

[SP3]

Thanks Keith,

Yes, this is the scenario I am rectifying. Threads let go in one section of Tower. Installing a helicoil. Is there a torque spec when reassembling the Tower to Head or just what feels tight?

[SP3]

These are bolts not nuts.

[mraitch]

thort rocker fasteners are studs!

[keith0alan]

Thanks Keith,

Yes, this is the scenario I am rectifying. Threads let go in one section of Tower. Installing a helicoil. Is there a torque spec when reassembling the Tower to Head or just what feels tight?

30-35 ft/lbs

[SP3]

Wanted to update the thread with a very informative post on this I found from one of our esteemed members - thank you Linda

http://www.311s.org/phpBB3/viewtopic.ph ... b6a1099f6c

As usual it appears YMWV but I am going err on the side of conservative spec shy of 30 ft. lbs. and hopefully no additional helicoils will be required in reassembly.

Thanks all for inputs