Tighten the lower vertical intake manifold bolts to 115 inch-pounds (13 Nm), then tighten the lower diagonal intake manifold bolts to 115 inch-pounds (13 Nm). Make sure you use an accurate torque wrench that has been calibrated within the last six to 12 months.
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What is the torque on exhaust manifold bolts?
To install: Install a new gasket and the exhaust manifold. Torque the bolts is sequence to: 89 inch lbs. (10 Nm).
Do I need a torque wrench for intake manifold?
Technically, it’s only necessary to tighten the manifold fasteners correctly. Some experienced mechanics can do that without a torque wrench. Many THINK they can do it without one, but are deceiving themselves.
Do you need to torque intake manifold bolts?
Intake manifold bolts and head studs/bolts have to be torqued in a certain pattern and to a certain torque spec in order for your engine to work properly.
How do you tighten exhaust manifold bolts?

How do you torque exhaust manifold studs?
Use a small amount of anti-seize on the exposed threads that will be in contact with the nut. Install the exhaust manifold gasket and exhaust manifold. Install the washers and 12-point nuts and torque the nuts to 40 ft-lbs. Tighten in a sequence working from the inside to the outside as shown at right.
How tight should exhaust springs be?
According to aftermarket pipe manufacturer Starting Line Products, there should be a spacing of 0.040รขโฌ to 0.050รขโฌ between the center windings. This can be easily measured with a feeler gauge if you want to get a grasp of what this distance รขโฌ” between a 1/16 and 1/32 of an inch.
What’s the torque sequence?
Bolt tightening sequence, or torque sequence, is defined in the torque tightening procedure. Flange joints are torqued tight with the help of a torque wrench (manual or hydraulic). The clamp load produced during tightening is higher than 75% of the fastener’s proof load.
What LS intake makes the most torque?
The LS6 bettered the early truck intake, but only above 5,500 rpm. The late-model truck intake offered the most power and torque of the factory manifolds, and even out-torqued the FAST LSXR up to 4,600 rpm. The big winner was (of course) the FAST LSXR, which produced 591 hp and 505 lb-ft of torque.
How do you torque LS head bolts?

How do you set a torque wrench?

How tight should torque converter bolts be?
We recommend that you loctite the bolts and torque to 45 ft/lbs.
How much horsepower does an Edelbrock intake manifold add?
With that the Edelbrock Performer EPS intake manifold has a runner design that’s “tuned” for peak torque at 3500 rpm on a 350-inch engine making it ideal for power from off-idle to 5500 rpm. Dyno tests showed gains of 5 hp and 9 ft-lbs.
What type of wrench should be used to tighten a bolt to a specified degree of tightness?
A torque wrench is a tool used to tighten nuts and bolts to a predetermined torque value. This instrument allows fasteners to be tightened to the proper tension, helping avoid damage from over tightening or joints coming apart from under tightening.
How do you install a SBC intake manifold?

Do you put Loctite on exhaust manifold bolts?
I have always used loctite nickel antisieze on the exhaust manifold socket head bolts together with a lock washer. Never had a probelm with them coming loose. However I check the bolt tightness after the first few weeks of use as the gaskets can compress over time with heat cycles. You could use a loctite.
How do you not break exhaust manifold bolts?

How much does it cost to replace exhaust manifold bolts?
Usually, this type of repair will run between two and three hours. Most independent shops charge around $80 to $90 an hour, so it should cost between $160 and $270 in labor. At a dealership, with a labor rate of approximately $110 an hour, you can expect a labor bill of between $220 and $330.
How do you tighten a stud?
Use a wrench to tighten the lower nut against the upper one, jamming them together (you’ll need a wrench to hold the upper one as well to prevent it from turning). Next, place a wrench on the lower nut and turn it counter-clockwise; the stud should walk right out.
How do you install a donut exhaust gasket?

What size are exhaust flange bolts?
The usual options of exhaust flanges are the 3 bolt or 2 bolt types. Usually, m10 with the 2 bolt option is helpful, and an m8 bolt for the 3 bolt. The recommended grade of bolts is 8.8 tensile or higher so that you can tighten them without stretching or breaking the bolts.
What is a exhaust donut?
An exhaust flange gasket is a round gasket that is commonly called a donut gasket. This gasket is often used to prevent exhaust leaks between the cast-iron exhaust manifold and the exhaust pipe of an automobile or truck. It is designed with a bevel on both sides of the gasket and a smooth, flat inner surface.
Why are there springs on exhaust bolts?
Usually to allow movement of the exhaust joints due to engine movement and to pre-load a ‘ball-and-socket’ exhaust joint together.
How do you fix an exhaust flange leak?

Should you torque the nut or the bolt?
The answer depends on your application and the condition of the materials being fastened. In many situations you can apply torque to either the nut or the bolt head. Both will result in a tight connection and neither will avoid breakage more often (that occurrence can be avoided through other means).