Installing cam bearings is a crucial step in the process of rebuilding a small block Chevy (SBC) engine. These bearings provide support and guidance to the camshaft, ensuring its proper operation. Improperly installed cam bearings can lead to severe engine damage and reduced performance.
Cam bearings are responsible for:
There are two main types of cam bearings used in SBC engines:
Before starting the installation process, gather the following tools and materials:
Step 1: Clean the Bearing Surfaces
Thoroughly clean the bearing surfaces in the engine block and on the camshaft using cleaning solvent. Remove any dirt, oil, or debris that may interfere with proper bearing installation.
Step 2: Align the Bearings
Use the bearing alignment tool to align the bearings in the engine block. Ensure that the bearings are flush with the block surface and that they are properly aligned with each other.
Step 3: Lubricate the Bearings
Apply a thin layer of lubricant to the bearing surfaces and the camshaft. This will facilitate ease of installation and reduce friction during operation.
Step 4: Press the Bearings
Use the cam bearing installation tool to press the bearings into place. Press the bearings firmly but evenly, ensuring that they are fully seated in the engine block.
Step 5: Measure the Runout
Once the bearings are installed, measure the runout of the camshaft using a dial indicator. The runout should be within the manufacturer's specifications, typically less than 0.003 inches.
Properly installed cam bearings provide several key benefits, including:
Installing cam bearings in an SBC engine is a critical task that requires precision and attention to detail. By following the proper procedures and using the right tools, you can ensure that your cam bearings are installed correctly, providing optimal engine performance and longevity.
Story 1: A mechanic was installing cam bearings in an engine when he accidentally dropped a bearing into the oil pan. Without skipping a beat, he grabbed a magnet and went fishing for it. To his surprise, he retrieved not only the missing bearing but also a pair of pliers he had lost months ago!
Lesson learned: Always have a magnet handy when working on engines.
Story 2: A novice mechanic was tightening the cam bearing bolts when he noticed that one of the bolts was loose. He tightened it with all his might, but it still wouldn't stay tight. Frustrated, he called a more experienced mechanic for help. The experienced mechanic simply tapped the loose bolt with a hammer, and it miraculously tightened right up.
Lesson learned: Sometimes, the simplest solutions are the best.
Story 3: A mechanic was installing cam bearings for a customer who was known for being extremely meticulous about his engine builds. As the mechanic was pressing the last bearing into place, the customer stopped him and said, "Wait a minute, I need to check the torque on that bolt." The mechanic rolled his eyes but agreed to tor
Table 1: SBC Cam Bearing Specifications
Bearing Number | Diameter (in) | Thickness (in) |
---|---|---|
1 | 1.9995-2.0005 | 0.3145-0.3155 |
2 | 1.9995-2.0005 | 0.3145-0.3155 |
3 | 1.9995-2.0005 | 0.3145-0.3155 |
4 | 1.9995-2.0005 | 0.3145-0.3155 |
5 | 1.9995-2.0005 | 0.3145-0.3155 |
Table 2: Recommended Cam Bearing Lubricants
Lubricant Type | Properties |
---|---|
Engine Oil | Readily available, provides good lubrication |
Cam Assembly Lubricant | Specifically designed for cam bearings, provides excellent lubrication and protection |
Bearing Grease | Provides high-temperature resistance, suitable for performance applications |
Molybdenum Disulfide Spray | Dry lubricant, reduces friction and wear |
Table 3: Benefits of Proper Cam Bearing Installation
Benefit | Description |
---|---|
Reduced Friction | Minimized wear and tear on the camshaft and bearings |
Proper Camshaft Alignment | Ensures optimal camshaft timing and performance |
Enhanced Oil Flow | Allows for proper lubrication of the camshaft and bearings |
Improved Engine Performance | Increased power output and efficiency |
Reduced Engine Wear | Extended engine longevity |
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