How do I install my Gen 3 Hemi Cylinder Heads?

To properly install your Hemi Cylinder Heads, follow the steps below. This will prevent oil and coolant leaks and a loss of compression from a blown head gasket.

**If you use aftermarket bolts or studs, follow the instructions that came with your new fasteners.**

Pre-Installation

Before installing your heads, ensure the following:

• The bolt holes in the block are clean and the threads are not damaged.
• The valves, seals, and springs are properly installed.
• The freeze plugs are installed.
• The block is secured to the engine stand.
  • It may rotate with the added weight of the cylinder head.

Installation Process

1. Press new Dowel Pins into the engine block.
   1. There are 2 dowels per side.
   2. They align the head to the block. Always replace them before installing your cylinder heads.
   3. If needed, lightly tap them in with a hammer.
2. Clean the deck surface of the block with a clean rag and acetone (or a similar cleaner).
3. Place the Head Gasket on the block.
   1. Make sure “L”, "R" or “this side up” is facing the appropriate direction.
4. Clean the deck surface of the head with a clean rag and acetone (or a similar cleaner).
5. Gently set the cylinder head on top of the head gasket.
   1. Be sure it sits properly on the dowels.
   2. Take care not to nick or scratch the deck surface of the head.
6. Install all the bolts finger-tight.
7. Torque the head bolts in 3 passes.
   1. See below for torque specs and sequence.
   2. Use a quality Torque Wrench and Torque Angle Gauge.
8. Repeat this process for the other cylinder head.