Head Stud Height
 

The spec calls for head studs to be 5.xxx. I believe its about 5/16, I forget the fraction. My existing upper studs are at 5". Do I install the new lowers to match the uppers? Oh its a stock ' 79 3.0 being rebuilt.

Thanks,
Kevin

I just installed mine at 5.315 (5 5/16) and they worked just fine. I don't recall what my upper studs measured but they were a little less than the 5.315.

5.00 seems very low. Did you have much thread engagement in the barrel nut when you disassembled the motor?

Hi,
The spec is 135mm (5.315 in ) or (5-5/16). Just did this last week and it worked fine.
Al

Hello, I was wondering where you measure the height from. Is it from the base of the cylinder where the cylinder base gasket would sit or from the machined surface around the stud itself? Thanks

They are measured from the sealing area of the case to cylinder opening. I was mistaken on the measurement I gave when I posted this question. I was measuring with a device that didnt start at zero, speed square. Seemed like the perfect toll and was once I accounted for the base thickness. Studs are now in place at spec height for all.

Kevin

Thank's Kevin

Kevin,

Whenever I do a head stud installation, I always use a depth measuring caliper and measure the depth of the cylinder from the seating surface of the head stud washer to the seating surface of the cylinder bottom with the case, add the washer thickness, and then the depth of the threads in the head nut. Better to be a little on the short side than too much on the long side. Too much on the long side, while maybe giving the allen driver enough bite to torque the nut, may not give enough seating depth to break the nut loose come disassembly time.

Just my $0.02.

With Supertec Head stud kits installation height is no longer an issue.
Just something to think about.

just measure the old ones.

You certainly don't mean "measure (install) the old Dilivar studs"?
Nothing could be more foolish.

hmmm oddly uncharacteristic

Henry,

I'm afraid I'm not familiar with the SuperTec headstud kits. Maybe you could explain how they don't require attention to installation height?

On the other hand, some folks may want to use different head studs than these, and then installation height is a issue.

And if you were to remove the old ones, and "Ooops, forgot to measure how tall they were", then one would have a valid question about installation height.