Only if you have never started it.
The correct spelling is "torqued" (apply torque or force).
Torque specs are very specific, based on whether or not the bolts are reusable, and if they are going through or into aluminum. you need to get the correct number and pattern for your motor from a repair manual or autozone.com.
You dont need to as long as bolts are tightened in the correct order and torqued to the correct fps.
Since intake manifold to head is a at a slant the gaskets are hard to keep in place then gasket sealer usually will be needed.A light thin layer of orange RTV on both intake and cylinder head will facilitate installation. A thin layer smeared on the head and then allowed to set-up partially first can hold the gaskets in place while the intake is set down on the heads. Let it set up before applying gaskets There should be 4 gasket parts on an 8 cylinder. Be sure all surfaces are clean and flat (true) without warpage. Bolts tightened in correct sequence and torqued is imperative!
What seems to be the problem you're having with them?
I never went by any pattern and never torqued the bolts and never have had a leak on all the pans I have installed.
With time, the heat within the heads could squeeze the gaskets unevenly causing the head to cylinder to leak. This could lead to costly repairs in the future for engine damage.
Torqued wheels help keep the rotors/drums/rims straight.
if u had to mess with the timing and u didnt put it at tdc then your just off a bit another thing is normally when u replace head gaskets u also should we place all gaskets such as intake,exhaust,valve cover ect.. cause when u take things off that are supposed to be torqued down the gaskets are flatten and should not every be reused of course i dont know what the car is doing but check for vaccum leaks and timing
Hey Lori==Several things can cause them to leak. The most common one is to overheat the engine. This causes the gaskets to burn between cylinders. Sometimes head bolts break because of a faulty bolt. Sometines the head isn't torqued properly. GoodluckJoe
Tighten them in a criss cross pattern very slowly until you have them all torqued to specs.
Over torqued, under torqued, age, abuse.