What is an Engine Build Sheet?

An engine build sheet is a detailed document that provides all the necessary information about building or rebuilding an engine. It includes specifications, measurements, parts list, and other important details that are required to assemble an engine correctly. The build sheet acts as a roadmap for engine builders, ensuring that each component is installed correctly and meets the desired specifications.

Why is an Engine Build Sheet Important?

An engine build sheet is crucial for ensuring the proper assembly and performance of an engine. It serves as a reference guide for engine builders, helping them keep track of the various components and specifications. Without a build sheet, there is a higher risk of mistakes, such as using incorrect parts or incorrect measurements, which can lead to engine failure or poor performance.

Benefits of Using an Engine Build Sheet

Using an engine build sheet offers several benefits:

• Accuracy: A build sheet ensures that each component is installed correctly, minimizing the risk of errors.
• Consistency: The build sheet acts as a standard reference, ensuring that the same specifications are followed for each engine build.
• Efficiency: With a build sheet, engine builders can work more efficiently, as they have all the necessary information readily available.
• Quality Control: The build sheet allows for thorough quality control, as each step of the assembly process can be checked against the specifications.

What Information is Included in an Engine Build Sheet?

An engine build sheet typically includes the following information:

1. Engine Specifications: This includes details such as the engine type, displacement, compression ratio, and bore/stroke measurements.
2. Parts List: A comprehensive list of all the parts required for the engine build, including part numbers and quantities.
3. Torque Specifications: The recommended torque values for each fastener, ensuring that they are tightened to the correct specifications.
4. Clearances: The desired clearances for various components, such as piston-to-wall clearance, bearing clearances, and valve clearances.
5. Assembly Instructions: Step-by-step instructions on how to assemble the engine, including any special procedures or precautions.
6. Fluid Capacities: The recommended fluid capacities for engine oil, coolant, and other vital fluids.
7. Timing and Firing Order: The correct timing sequence and firing order for the engine.
8. Recommended Modifications: Any recommended modifications or upgrades that can enhance the engine’s performance.
9. Testing and Break-In Procedures: Instructions on how to properly test and break-in the engine after assembly.

Sample Engine Build Sheets

Sample 1: Small Block Chevy 350

Engine Type: Small Block Chevy 350
Displacement: 5.7 liters
Compression Ratio: 10.0:1
Bore/Stroke: 4.00″/3.48″
Parts List: – Pistons: Part #12345, Quantity: 8 – Connecting Rods: Part #67890, Quantity: 8 – Crankshaft: Part #54321, Quantity: 1 – Cylinder Heads: Part #98765, Quantity: 2 – Camshaft: Part #24680, Quantity: 1 – Lifters: Part #13579, Quantity: 16 – Timing Set: Part #86420, Quantity: 1 – Gaskets: Part #11111, Quantity: 1 set – Bolts and Fasteners: Various sizes and quantities Torque Specifications: – Main Cap Bolts: 70 ft-lbs – Rod Bolts: 45 ft-lbs – Cylinder Head Bolts: 65 ft-lbs Clearances: – Piston-to-Wall Clearance: 0.0025″-0.0035″ – Bearing Clearances: 0.0015″-0.0025″ – Valve Clearances: Intake 0.014″, Exhaust 0.016″ Assembly Instructions: 1. Install main bearings and crankshaft. 2. Install pistons and connecting rods. 3. Install cylinder heads and torque to specifications. 4. Install camshaft and timing set. 5. Install lifters and adjust valve clearances. 6. Install intake manifold, carburetor, and distributor. 7. Install exhaust headers and ignition system. Fluid Capacities: – Engine Oil: 5 quarts – Coolant: 12 quarts Timing and Firing Order: – Firing Order: 1-8-4-3-6-5-7-2 – Ignition Timing: 10° BTDC Recommended Modifications: – Upgraded camshaft for increased performance. Testing and Break-In Procedures: 1. Prime the oil system before starting the engine. 2. Start the engine and run it at varying RPMs for 20 minutes. 3. Change the oil and filter after the break-in period.

Sample 2: Ford Mustang 5.0 Coyote

Engine Type: Ford Mustang 5.0 Coyote
Displacement: 5.0 liters
Compression Ratio: 11.0:1
Bore/Stroke: 3.63″/3.65″
Parts List: – Pistons: Part #54321, Quantity: 8 – Connecting Rods: Part #98765, Quantity: 8 – Crankshaft: Part #12345, Quantity: 1 – Cylinder Heads: Part #67890, Quantity: 2 – Camshafts: Part #86420, Quantity: 2 – Lifters: Part #11111, Quantity: 32 – Timing Set: Part #24680, Quantity: 1 – Gaskets: Part #13579, Quantity: 1 set – Bolts and Fasteners: Various sizes and quantities Torque Specifications: – Main Cap Bolts: 90 ft-lbs – Rod Bolts: 50 ft-lbs – Cylinder Head Bolts: 100 ft-lbs Clearances: – Piston-to-Wall Clearance: 0.003″-0.004″ – Bearing Clearances: 0.0015″-0.0025″ – Valve Clearances: Intake 0.014″, Exhaust 0.016″ Assembly Instructions: 1. Install main bearings and crankshaft. 2. Install pistons and connecting rods. 3. Install cylinder heads and torque to specifications. 4. Install camshafts and timing set. 5. Install lifters and adjust valve clearances. 6. Install intake manifold, throttle body, and fuel injectors. 7. Install exhaust headers and ignition system. Fluid Capacities: – Engine Oil: 8 quarts – Coolant: 16 quarts Timing and Firing Order: – Firing Order: 1-8-7-2-6-5-4-3 – Ignition Timing: 12° BTDC Recommended Modifications: – Cold air intake and performance exhaust system. Testing and Break-In Procedures: 1. Prime the oil system before starting the engine. 2. Start the engine and run it at varying RPMs for 30 minutes. 3. Change the oil and filter after the break-in period.

Sample 3: Honda Civic B16A

Engine Type: Honda Civic B16A
Displacement: 1.6 liters
Compression Ratio: 10.2:1
Bore/Stroke: 81mm/77.4mm
Parts List: – Pistons: Part #12345, Quantity: 4 – Connecting Rods: Part #67890, Quantity: 4 – Crankshaft: Part #54321, Quantity: 1 – Cylinder Head: Part #98765, Quantity: 1 – Camshaft: Part #24680, Quantity: 1 – Lifters: Part #13579, Quantity: 16 – Timing Belt: Part #86420, Quantity: 1 – Gaskets: Part #11111, Quantity: 1 set – Bolts and Fasteners: Various sizes and quantities Torque Specifications: – Main Cap Bolts: 29 ft-lbs – Rod Bolts: 23 ft-lbs – Cylinder Head Bolts: 43 ft-lbs Clearances: – Piston-to-Wall Clearance: 0.0015″-0.0025″ – Bearing Clearances: 0.0015″-0.0025″ – Valve Clearances: Intake 0.006″, Exhaust 0.008″ Assembly Instructions: 1. Install main bearings and crankshaft. 2. Install pistons and connecting rods. 3. Install cylinder head and torque to specifications. 4. Install camshaft and timing belt. 5. Install lifters and adjust valve clearances. 6. Install intake manifold, throttle body, and fuel injectors. 7. Install exhaust manifold and ignition system. Fluid Capacities: – Engine Oil: 4.2 quarts – Coolant: 7.6 quarts Timing and Firing Order: – Firing Order: 1-3-4-2 – Ignition Timing: 16° BTDC Recommended Modifications: – Cold air intake and performance exhaust system. Testing and Break-In Procedures: 1. Prime the oil system before starting the engine. 2. Start the engine