Bbc cylinder head torque sequence

Intake Manifold Bolts Cast Iron Head. Main Bearings 110 ft.

38 Outer Main Caps 4 bolt Engine Oil.

Bbc cylinder head torque sequence. 50 torque OK lets just say 35 FtLbs then final round at specs. For Head Studs or aftermarket bolts CHECK YOUR INSTRUCTIONS BBC studs are available in a ton of different. Styles depending on heads and stud diameter 716 and 12.

For what ever you use make sure the threads in the block are clean. It doesnt hurt to run a tap on every bolt hole. Main Cap Bolt 396-427 2-Bolt 95 ft-lbs.

Main Cap Bolt 396-454 4-Bolt Inner and Outer 110 ft-lbs. Cylinder Head Bolts Long. Cylinder Head Bolts Short.

Screw-In Rocker Arm Studs. Intake Manifold Bolts Cast Iron Head. The torque spec can be anywhere from 25-35 on Iron heads but for aluminum I tend to go towards the lower side.

IF you do have a spec from the manufacturer follow that. Make sure threads in the head are clean and in good. Main Caps 396-427 2 bolt Engine Oil.

Main Caps 396-454 4 bolt Inner and Outer bolts. 38 Connecting Rod Cap. 716 Connecting Rod Cap.

Engine oil blind hole Sealer water jacket 75 ft-lbs. Long bolts 65 ft-lbs. Short bolts Rocker Studs screw-in Engine Oil.

BBC L29 Vortec heads Mark IV cylinder heads on later Mark V block. There are gaskets made specifically for this swap. 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.

General Motors 74L Head Gasket Issue. In this example provided by Summit Racing you can see the torque sequence for a typical LS head. The pattern for most heads will start in the center and then hop back and forth towards the outer.

According to the 454 engine manual Torque Specifications oiled threads. Cylinder head 80 ft. Connecting Rod 50 ftlbs.

Main Bearings 110 ft. Intake Manifold 30 ft. Exhaust Manifold 20 ft.

Spark Plug 15 ft. Place head bolt washers over each bolt hole. 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. Torque the bolts in the three stages. Installation Instructions for AFR Heads.

Use the links located on the left to view the instruction sheet for the product you are installing. Installation instructions are embeded into the page as a PDF document so you can save or print the instructions for later use. Between the head and the fastener to prevent galling.

All aluminum cylinder heads should be torqued to 65ftlbs. This should be done in the proper General Motors sequence in 10-ftlb increments beginning at 40ftlbs. Moly lube should be applied between fasteners washers and areas around head bolt to prevent galling and improper torque values.

Aluminum cylinder heads with factory bolts should be torqued to 70-75 ftlbs using Permatex thread sealant with Teflon. Be sure to follow the proper GM torque sequence starting at 40 ftlbs and increasing by 10ftlbs until reaching the recommended setting. GM 74L-454ci-V8 Engine Torque Specs.

Over 6000 Automotive Torque Specs. Search Car Torque Specifications by Engine or Model. Cylinder Head To Engine Block 80 Ft-Lbs 960 In-Lbs 10847 N-m Years.

Torque to the head manufactures instructions in proper sequence and steps. Youll need hardened pushrods to work with guide plates. You need the proper size spark plugs thread diameter depth install using a bit of antiseize.

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. If you were to pocket-port these heads and add larger 219188-inch valves you could make 530-plus horsepower. The BRODIX Head Hunter series represents the cutting edge of conventional big block technology.

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. 716 Main Caps 2 bolt Engine Oil. 716 Inner Main Caps 4 bolt Engine Oil.

716 Outer Main Caps 4 bolt Engine Oil. 38 Outer Main Caps 4 bolt Engine Oil. Engine oil blind hole Sealer water jacket 65 ft-lbs.

16-19 in torque sequence M8 X 2550 in. Washer 20-23 in torque sequence M8 X 2725 in. Washer Studs 20 thru 23 screw into the bottom of the cylinder head and protrude into the lifter valley once the head is installed.

Small Block Chevrolet Compatible Heads. 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.