About the 351W Engine
The 351W engine, also known as the Ford Windsor engine, is a V8 engine produced by Ford Motor Company. It was introduced in 1969 and was widely used in various Ford vehicles until 1996. The “W” in its name stands for Windsor, which is the city in Ontario, Canada, where the engine was manufactured. The 351W engine is known for its durability, reliability, and performance. It has a displacement of 351 cubic inches (5.8 liters) and has been a popular choice among car enthusiasts and builders for its power and versatility.
351W Head Bolt Torque Specs
When assembling or reassembling the cylinder heads of a 351W engine, it is crucial to torque the head bolts to the correct specifications. This ensures proper sealing and prevents any leaks or damage to the engine. The following table provides the recommended head bolt torque specifications for the 351W engine:
| Stage | Torque Specs (ft. lbs.) | Torque Specs (Nm) |
|---|---|---|
| Stage 1 | 65-75 | 88-102 |
| Stage 2 | 85-95 | 115-129 |
| Stage 3 | 95-105 | 129-142 |
Head Bolt Torque Procedure
To properly torque the head bolts of a 351W engine, follow these steps:
1. Start by cleaning the threads of the head bolts and the bolt holes in the engine block. This ensures accurate torque readings and helps prevent any binding or damage during tightening.
2. Apply a small amount of engine oil or assembly lubricant to the threads of the head bolts. This helps reduce friction and ensures consistent torque readings.
3. Begin the torque procedure by tightening all head bolts to the Stage 1 torque specification. Use a torque wrench and tighten the bolts in a crisscross pattern, gradually increasing the torque until reaching the specified range.
4. Once all head bolts have been torqued to Stage 1 specifications, proceed to Stage 2. Again, tighten the bolts in a crisscross pattern, gradually increasing the torque until reaching the Stage 2 range.
5. Finally, move on to Stage 3 and repeat the tightening process. Ensure that all head bolts are torqued to the specified range for Stage 3.
6. After completing the torque procedure, it is recommended to perform a final torque check. This involves re-torquing all head bolts to the Stage 3 specification, ensuring they are properly tightened.
By following these torque specifications and procedures, you can ensure the proper installation of the cylinder heads on your 351W engine, promoting optimal performance and reliability.
Remember, it is essential to consult the specific service manual or manufacturer’s instructions for your engine to ensure accurate and up-to-date torque specifications.