Tools and Materials Needed:
- Socket set
- Torque wrench
- Head gasket
- New cylinder heads
- Head bolts
- Gaskets
- Engine coolant
- Oil filter
Step 1: Preparation
- Disconnect the battery.
- Drain the engine coolant.
- Remove the intake manifold, valve covers, and exhaust manifolds.
- Remove the rocker arms, pushrods, and lifters.
Step 2: Head Gasket Removal
- Carefully remove the old head gasket from the cylinder head surface and the engine block.
- Clean the surfaces to ensure proper sealing.
Step 3: Head Installation
- Place the new head gasket onto the cylinder head and align it with the bolt holes.
- Install the new cylinder heads onto the engine block.
- Finger-tighten the head bolts to hold the cylinder heads in place.
Step 4: Torque the Head Bolts
- Use a torque wrench to tighten the head bolts in the correct sequence. The torque specifications for Chevrolet 350 engines vary depending on the year and model.
- Refer to the specific engine specifications for the recommended torque values. Generally, the torque range for Chevrolet 350 head bolts is between 65-70 ft-lbs (88-95 Nm).
Step 5: Reassembly
- Reinstall the rocker arms, pushrods, and lifters.
- Reinstall the intake manifold, exhaust manifold, and valve covers.
- Reconnect the spark plug wires and other electrical connections.
Step 6: Fluids
- Refill the engine coolant.
- Replace the oil filter.
Step 7: Start the Engine
- Reconnect the battery.
- Start the engine and let it run for a few minutes to circulate the coolant and build up oil pressure.
- Check for any leaks.
It's important to follow the manufacturer's specific instructions and torque specifications for your particular engine model to ensure proper installation and avoid any issues. If you're not comfortable performing this task or don't have the necessary tools, it's recommended to seek help from a qualified mechanic.
