Torque spec rocker shaft hold-down bolts.

[SS_Sean]

What's the torque spec on the rocker shaft hold-down bolts? Thanks.

 

[Lee Thompson]

Imo

On production iron heads---I like to run a bottoming tap as far as it will go. There is some hole that is not tapped. Then buy a slightly longer grade 8 bolt with flat washer and torque to 25-30 ft. lbs. I believe book calls for 25 ft. lbs. But with a longer bolt I go 30.

Great picture of your Malibu--I have a heat only box that came out of an 80 El-Camino--know anyone that could use it?

 

[SS_Sean]

Thanks for the info. I'm using a stock bolt on stock heads with a TA heavy duty shaft. I'll torque to factory.

For the heat box, advertise it at ***** MalibuRacing.com - THE 78-83 Malibu Performance Site! ***** in the parts for sale area. You will sell it guaranteed!! Thanks for the complement on the malibu. It was a fun build!

 

[bison]

Ive always done what Lee does and torque to 25 ft/lbs.

 

[bison]

On production iron heads---I like to run a bottoming tap as far as it will go. There is some hole that is not tapped. Then buy a slightly longer grade 8 bolt with flat washer and torque to 25-30 ft. lbs. I believe book calls for 25 ft. lbs. But with a longer bolt I go 30.

Great picture of your Malibu--I have a heat only box that came out of an 80 El-Camino--know anyone that could use it?

Doesnt the heat only box require removal of the dash to install properly? Ive seen a regal with one myself.

 

[SS_Sean]

Cool. Any of you guys know what torque spec to use on ARP head studs? I've got the studs instead of bolts.

 

[Lee Thompson]

ARP studs

I've always had good luck with studs on iron head--Top row @ 80 ft. lbs. with ARP lube and bottom row @ 75.

 

[SS_Sean]

Good stuff. Does anyone happen to have the pattern I should follow while torquing the head studs? I attempted a search and came up with five hundred pages of crap.

 

[blown okie]

start in the middle & work toward the ends evenly front to back

 

[SS_Sean]

Ran into a little problem with the lower head bolts. The exhaust manifold flange right at the left side of the center tube, near the number three plug was blocking the head stud nut. Oh, well. It was the same on the other side, also. Thanks for the help.