Bbc Cylinder Head Torque Sequence

Use the links located on the left to view the instruction sheet for the product you are installing. GM 74L-454ci-V8 Engine Torque Specs.

Gm Engine Torque Specs

716 Inner Main Caps 4 bolt Engine Oil.

Bbc cylinder head torque sequence. Make sure threads in the head are clean and in good. For Head Studs or aftermarket bolts CHECK YOUR INSTRUCTIONS BBC studs are available in a ton of different. Screw-In Rocker Arm Studs.

For what ever you use make sure the threads in the block are clean. Cylinder head 80 ft. Short bolts Rocker Studs screw-in Engine Oil.

In this example provided by Summit Racing you can see the torque sequence for a typical LS head. 16-19 in torque sequence M8 X 2550 in. 716 Main Caps 2 bolt Engine Oil.

Main Caps 396-427 2 bolt Engine Oil. Over 6000 Automotive Torque Specs. BBC L29 Vortec heads Mark IV cylinder heads on later Mark V block.

BR 7 LS7 Compatible Series Cylinder Heads12 BR 3 Series LS3 Compatible Series Cylinder Heads15 IK Series Cylinder Heads23 Race-Rite Small Block Series23 Dragon Slayer Series Cylinder Heads23 Track 1 Series Cylinder Head23 Head Hunter Series23 11 X. Torque to the head manufactures instructions in proper sequence and steps. You need the proper size spark plugs thread diameter depth install using a bit of antiseize.

Installation instructions are embeded into the page as a PDF document so you can save or print the instructions for later use. Connecting Rod 50 ftlbs. General Motors 74L Head Gasket Issue.

Between the head and the fastener to prevent galling. If you were to pocket-port these heads and add larger 219188-inch valves you could make 530-plus horsepower. Washer Studs 20 thru 23 screw into the bottom of the cylinder head and protrude into the lifter valley once the head is installed.

Once they are in place put a small amount of ARP moly lube on the tops of all washers. Coat all threads with Permatex 3H Aviation Form-a-Gasket follow Permatexs directions for set-up time then place the bolts in their proper locations. Main Cap Bolt 396-427 2-Bolt 95 ft-lbs.

Spark Plug 15 ft. Aluminum cylinder heads with factory bolts should be torqued to 70-75 ftlbs using Permatex thread sealant with Teflon. All aluminum cylinder heads should be torqued to 65ftlbs.

Washer 20-23 in torque sequence M8 X 2725 in. Long bolts 65 ft-lbs. The torque spec can be anywhere from 25-35 on Iron heads but for aluminum I tend to go towards the lower side.

38 Connecting Rod Cap. Use other gaskets at youre own risk- these are what you want from a VR press release presumably prior to the Gen 6 engine release. Cylinder Head To Engine Block 80 Ft-Lbs 960 In-Lbs 10847 N-m Years.

716 Connecting Rod Cap. Main Cap Bolt 396-454 4-Bolt Inner and Outer 110 ft-lbs. According to the 454 engine manual Torque Specifications oiled threads.

Place head bolt washers over each bolt hole. Be sure to follow the proper GM torque sequence starting at 40 ftlbs and increasing by 10ftlbs until reaching the recommended setting. Intake Manifold 30 ft.

This should be done in the proper General Motors sequence in 10-ftlb increments beginning at 40ftlbs. Engine oil blind hole Sealer water jacket 75 ft-lbs. Torque the bolts in the three stages.

716 Outer Main Caps 4 bolt Engine Oil. If you were looking to build a budget-oriented Rat for towing where power above 4500 rpm was not a concern these heads would be an excellent choice with almost 600 lb-ft of torque at 3200 rpm. Exhaust Manifold 20 ft.

Youll need hardened pushrods to work with guide plates. IF you do have a spec from the manufacturer follow that. Main Bearings 110 ft.

Search Car Torque Specifications by Engine or Model. Cylinder Head Bolts Long. It doesnt hurt to run a tap on every bolt hole.

These heads are 100 CNC ported and utilize features such as raised oval-shaped intake ports that flow an amazing 489 cfm and up and newly designed exhaust ports that flow 335 cfm with only a 1850 exhaust valve. Intake Manifold Bolts Cast Iron Head. The BRODIX Head Hunter series represents the cutting edge of conventional big block technology.

Installation Instructions for AFR Heads. Small Block Chevrolet Compatible Heads. 50 torque OK lets just say 35 FtLbs then final round at specs.

Styles depending on heads and stud diameter 716 and 12. Engine oil blind hole Sealer water jacket 65 ft-lbs. The pattern for most heads will start in the center and then hop back and forth towards the outer.

Moly lube should be applied between fasteners washers and areas around head bolt to prevent galling and improper torque values. Cylinder Head Bolts Short. 38 Outer Main Caps 4 bolt Engine Oil.

There are gaskets made specifically for this swap. Main Caps 396-454 4 bolt Inner and Outer bolts.

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