| Fastener Type Torque Spec | Intake Manifold Bolts (Cast Iron Heads) 30 ft. -lbs. | Oil Pump Bolt 60-70 ft.-lbs. | Cam Sprocket Bolts 18-20 ft.-lbs. | Harmonic Damper Bolt 60 ft.-lbs. |
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What is the torque on a 350 intake?
In the GM 350-cubic-inch engine, the intake manifold bolts to the cylinder head with 33 foot-pounds of torque .
What is the torque for intake manifold bolts?
Intake manifold bolts on SBC engines should be torqued to 30 lb-ft in a two-step sequence. First time around, set your torque wrench to 20, follow the pattern, then repeat the pattern (image above) again after setting the wrench to 30.
What is the torque specs on a Chevy 350 exhaust manifold?
| Bolts or Parts Lube or Sealer Torque to: | Valve Cover Engine Oil 3 ft-lbs. | Exhaust Manifold Anti-Seize Lubricant 25 ft-lbs. | Spark Plugs No Lube or Sealer 20 ft-lbs. | Flexplate (Automatic) Flywheel (Clutch) Thread Locker 60 ft-lbs. |
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What are the torque specs for manifold?
The standard is to use 20 to 30 foot-pounds of torque . Older engines often fall on the lighter side of the equation, so use 15 to 20 foot-pounds of torque if your engine is 15 years old or older. Some manifolds house different sensors and plugs, such as a check valve or exhaust plug.
What is a 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). ... Torque bolts and nuts in a “CRISS-CROSS” sequence using a minimum of three torquing passes and the maximum bolt stress as defined.
What is the firing order on a small block Chevy?
However, the firing order for the Chevy V8, both the SBC and BBC variant is the same: 1-8-4-3-6-5-7-2 . This means that cylinder 1 fires first, followed by cylinder 8, then 4, and so on and so forth until all cylinders have fired in that order.
What are the torque specs for a small block Chevy intake manifold?
| Fastener Type Torque Spec | Intake Manifold Bolts (Cast Iron Heads) 30 ft.-lbs. | Oil Pump Bolt 60-70 ft.-lbs. | Cam Sprocket Bolts 18-20 ft.-lbs. | Harmonic Damper Bolt 60 ft.-lbs. |
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How much horsepower would a stock 400 SBC with Vortec heads?
With the stock Vortec heads, the low-compression 400 managed to make 376 hp and almost 450 lb-ft of torque.
What are the torque specs?
By definition, torque refers to the amount of rotational force at the point of application . When attaching a wheel to a vehicle, torque specifications are the amount of force recommended on the hardware to ensure proper installation. Following exact torque specifications matters for a number of reasons.
What grade bolts should I use for exhaust manifold?
Common practice is to replace the exhaust manifold bolts on ’94 – ’96 cars with Grade 8 hardware . They are hardened and will carry the highest tensile load, which seems to help them withstand the heat cycles the bolts are exposed to.
How are torque patterns calculated?
Begin with the formula T = K x U x D x P , where T is the torque, K is a standard representing 1.33, U is the coefficient of friction, D is the diameter of the fasteners, and P is the necessary preload.
Why is a torque sequence important?
Because the joint surfaces compress , tightening one bolt in the vicinity of another will affect the preload generated by the first bolt tightened. A good tightening sequence ensures that an even preload distribution is achieved in the joint (See Dia. A).
