WESTERN AUTO WIZARD R-5700 Compression Tester

( Brand: Western Auto Wizard ), ( Manufacturer Part Number: R-5700 ), ( Engine Type: Gasoline ), ( Type: Compression Tester ), ( Vehicle Type: Passenger Vehicle ), ( Maximum Psi: 300 Psi )

Review WESTERN AUTO WIZARD Vintage Compression Tester

The **Western Auto Wizard R-5700 Compression Tester** is a robust, high-performance diagnostic tool designed to provide accurate and reliable cylinder compression readings for internal combustion engines, making it an indispensable asset for mechanics, automotive enthusiasts, and professional technicians. Engineered with precision and durability in mind, this tester features a **digital display** with a clear backlit screen that delivers real-time compression measurements in PSI (pounds per square inch), ensuring quick and easy interpretation of engine health. Unlike analog gauges that can be prone to human error or misreading, the R-5700 s digital interface eliminates guesswork, offering consistent and repeatable results with minimal effort. Its **adjustable compression adapter** accommodates a wide range of spark plug sizes, from standard 5/8" to 13/16" threads, making it versatile for most modern and older engines alike. The tester is equipped with a **high-quality, durable rubber hose** that connects seamlessly to the adapter, ensuring a secure seal and preventing air leaks that could skew readings. Built to withstand the rigors of frequent use, the R-5700 is constructed from **heavy-duty materials**, including a reinforced metal housing and a sturdy grip, allowing for comfortable handling even in tight or awkward engine bay spaces. Whether diagnosing a misfiring cylinder, evaluating engine wear, or verifying compression after a rebuild, this tester provides the clarity and confidence needed to make informed decisions. Its **quick-connect design** simplifies the testing process, reducing setup time and allowing technicians to focus on diagnosing issues rather than struggling with cumbersome tools. Additionally, the R-5700 includes a **carrying case** for safe storage and transport, protecting the device from dust, moisture, and accidental damage. With its combination of **accuracy, durability, and user-friendly features**, the Western Auto Wizard R-5700 Compression Tester stands out as a top-tier choice for anyone serious about maintaining or repairing engines with precision.

**Pros and Cons of buying a Western Auto Wizard R-5700 Compression Tester**

The Western Auto Wizard R-5700 is a popular compression tester designed for automotive use, particularly for checking engine cylinder compression. Below is a detailed breakdown of its advantages and disadvantages.

### **Pros**

1. **Affordability** Compared to professional-grade compression testers, the R-5700 is relatively inexpensive, making it accessible for DIY mechanics and hobbyists on a budget.

2. **User-Friendly Design** The tester is simple to use, with clear markings and an intuitive gauge. It includes a built-in adapter for most spark plug threads, reducing the need for additional tools.

3. **Durability** Constructed with metal components, the tester is sturdy and built to withstand repeated use, though it is not as rugged as industrial-grade tools.

4. **Portability** It is compact and lightweight, making it easy to carry in a toolbox or vehicle for on-the-go diagnostics.

5. **Compatibility** Works with most gasoline engines, including those with standard spark plug threads (14mm, 18mm, etc.), though some may require an adapter.

6. **Visual Readout** The analog gauge provides a clear, immediate reading of compression levels, allowing for quick assessments of engine health.

7. **Brand Reliability** Western Auto is a well-known brand in the automotive aftermarket, offering products that are generally reliable for their intended purpose.

### **Cons**

1. **Limited Precision** The gauge has a relatively coarse scale (measured in PSI), which may not provide highly detailed readings for advanced diagnostics. This can make it difficult to detect subtle compression issues.

2. **No Digital Readings** Unlike digital compression testers, the R-5700 lacks electronic features such as data logging, averaging, or digital display, which can be useful for more precise analysis.

3. **Adapter Dependency** While it includes some adapters, users may still need to purchase additional ones for non-standard spark plug threads, adding to the overall cost.

4. **Potential for User Error** Since the tester relies on manual operation, improper sealing or incorrect installation of the adapter can lead to inaccurate readings.

5. **No Leak-Down Test Function** Unlike some higher-end testers, the R-5700 does not include a leak-down test feature, which is useful for diagnosing valve or piston ring issues.

6. **Durability Concerns Over Time** While sturdy, the metal components may wear out or become less accurate with prolonged or heavy use, especially if mishandled.

7. **Limited Warranty** The warranty may not cover all potential defects or damage from misuse, leaving users responsible for repairs or replacements out-of-pocket.

### **Conclusion**

The Western Auto Wizard R-5700 is a solid, budget-friendly option for basic engine compression testing. It excels in simplicity, affordability, and portability, making it ideal for casual mechanics, DIY enthusiasts, or those performing occasional diagnostics. However, its limitations in precision, lack of advanced features, and potential for user error make it less suitable for professional mechanics or detailed engine analysis.

If your primary need is a quick, no-frills compression test for routine maintenance or simple troubleshooting, the R-5700 is a practical choice. For more advanced diagnostics, a digital tester or a higher-end analog model may be worth the investment.

### **Recommendation**

- You are a DIY mechanic or hobbyist with basic engine knowledge.

- You need a reliable, affordable tool for occasional compression testing.

- You prioritize simplicity and portability over advanced features.

- You require precise readings for professional diagnostics.

- You need additional features like leak-down testing or digital output.

- You frequently work with engines that require non-standard adapters, as extra costs may accumulate.

For most home mechanics, the R-5700 strikes a good balance between cost and functionality, but those with more demanding needs should explore higher-quality options.

Details:

Western Auto tools mid 20th century, often 1950s 1970s in original box. Vintage Western Auto Wizard compression tester model 20700 still in its original packaging.

part #: r5700 price

• $25.00

specifications compressionvacu:

• brand: Western Auto Wizard
• mpn: R-5700
• engine type: Gasoline
• type: Compression Tester
• vehicle type: Passenger Vehicle
• maximum psi: 300 Psi

payments compressionvacu:

• wallet: Apple-pay
• other
• credit card: Diners-club

returns compressionvacu:

• policy: No Returns

seller compressionvacu:

• # reviews: 0
• city: Williamsburg, Virginia
• rating: 0.0%

shipping compressionvacu:

• carrier: USPS
• transit: 5-11 Days
• class: Standard
• service: USPS Ground Advantage
• type: Calculated
• cost: $10.69

general compressionvacu:

• condition: Used
• Automotive Tools Supplies > Diagnostic Service Tools > Compression Vacuum Testers

offer compressionvacu:

• started: May 31, 2026
• sold: 0
• availability: In Stock
• options: Ship-to-home
• quantity: 1
• best offers: True