Bwebb Stang

ok so i looked in the tech articles for torque specs for my studs and for the heads but no luck on the studs and i have a question on the head bolts. are the torque specs the same on an aluminum head as they are on a cast iron head. and how much torque do you put on the rocker studs. a little background i have tfs highports arp head bolt and 1.6 comp cams roller rockers if that makes any difference. thanks

mjr46

just finished a tfs set up rocker studs are 55 ft lbs and longer head bolts final torque is I beleve 80 ft lbs and shorter ones 70 ft lbs?? all the info is on trick flows website...you have to scroll through the instructions and find it but yes it's there amongst all the pages of other stuff for arp hardware tech info it is on their website.

Bwebb Stang

ok thanks that helps a lot one final thing what is the torque on the rockers i would look on the trfs web site but the rockers aren't tfs

1991LX5.0

MJR is right i have aluminum heads with head studs and i was told 80ft-lbs on the upper studs and 70 ft-lb on the lower studs, but i dont remember what i torqued my rocker studs to

mjr46

if the rockers are stud mount then you set the lash to 0 then give the lock nut a quarter to half a turn past zero lash then while holding the lock nut with a wrench tighten the allen jam nut as tight as you can but not to excessive you break the allen wrench. I don't think you have pedastal mount cause you asked how tight are the rocker studs suppose to be.

CantStopTheFox...

I am no tech...so I followed the Haynes Manual for all torque specs.no problems, and no leaks.

The only torque specs that I followed outside the manual wasfor the heads...I went with the ARP standards

Cannot remember exactly what they were, but they came with the instructions on the ARP bolts...

1991LX5.0

my mistake i thought he was asking what to torque to use to boltthe actual rocker studs down onto the head before putting the rockers on

Bwebb Stang

so heads final torque is 80ft lbs? rocker studs. are 55 ft. lbs and the rocker arms is the whole lash deal. ?

1991LX5.0

you want to tighten the polylock until you cant spin the pushrod in your fingers anymore(zero lash) then tighten it an extra 1/2 turn for lifter preload. Then while holding the polylock with a wrench,tighten down the set screw. You need to do this with all the rockers one by one while it is on the base circle of the cam

Bwebb Stang

do guide plates go under the studs