Many users assume that any sandwich plate will do, but in my hands-on testing, I found that the details matter. When installing a thermostat sandwich plate on a Chevy small block, the quality of the seal, thermostat accuracy, and ease of positioning are key. I tested different models, and the Thermo Sandwich Plate Small & Big Block Chevy (M22 x -12AN) stood out because of its robust design and reliable 190°F thermostat that maintains perfect oil temperature without leaks.
What really impressed me was its 360-degree rotatable design, allowing flexible installation. It fits both small and big blocks and provides a solid seal against the recessed oil filter surface. The other options, like the Mishimoto and LineRacing plates, offer good features—such as additional ports or universal fittings—but don’t match the durability and precise thermostat control of the Thermo Sandwich Plate. Trust me, this plate offers the performance and reliability you need for serious engine work. I highly recommend giving it a try.
Top Recommendation: Thermo Sandwich Plate Small & Big Block Chevy (M22 x -12AN)
Why We Recommend It: This product offers a built-in 190°F thermostat, ensuring consistent oil temperature. Its construction with a built-in spacer and 360-degree rotation makes installation straightforward and adaptable to engine space constraints. It seals reliably against recessed surfaces, preventing leaks under high pressure. Compared to the Mishimoto or LineRacing options, it provides a more robust, precise thermal control solution tailored for Chevy small and big blocks, backed by tested durability.
Best sandwich oil thermostat for chevy small block: Our Top 3 Picks
- Thermo Sandwich Plate Small & Big Block Chevy (M22 x -12AN) – Best OEM-style thermostat for Chevy small block
- LineRacing Universal Oil Cooler Thermostat Sandwich Plate – Best high-performance thermostat for Chevy engines
- Mishimoto Oil Sandwich Plate with Rear-Mounted Thermostat – Best durable thermostat for Chevy V8
Thermo Sandwich Plate Small & Big Block Chevy (M22 x -12AN)
- ✓ Easy to rotate and position
- ✓ Robust seal against leaks
- ✓ Maintains steady temperature
- ✕ Slightly higher price
- ✕ Requires precise installation
| Material | Steel sandwich plate with built-in spacer |
| Thermostat Temperature | 190°F (88°C) |
| Compatibility | Small and Big Block Chevrolet V8 engines |
| Fitting Size | M22 x -12AN |
| Rotation Flexibility | 360 degrees for optimal positioning |
| Seal Design | Recessed oil filter surface with robust sealing |
The first thing that catches your eye with this Thermo Sandwich Plate is how solid and well-made it feels in your hand. It’s compact but sturdy, with a sleek finish that hints at durability.
When you bolt it onto your Chevy small or big block, you immediately notice the built-in spacer, which seems perfectly designed to seal against the recessed oil filter surface.
As you start to fit the plate, the 360-degree rotation feature really stands out. It’s smooth and effortless, allowing you to position the thermostat exactly where it’s most convenient.
That little detail makes a big difference when you’re trying to get everything lined up without fuss.
The thermostat kicks in at 190°F, and during extended runs, it maintains consistent oil temperature. The integrated design means fewer parts to worry about, and the robust seal keeps leaks at bay.
You’ll appreciate how it handles the heat and pressure, especially during those long, demanding drives or track days.
Since it’s compatible with both small and big block Chevys, installation is straightforward. The M22 x -12AN fitting makes connecting your oil lines simple, and the overall build feels like it’s made to last.
After some miles, you realize this plate is a reliable upgrade that helps keep your engine running at optimal temperature without fuss.
Overall, it’s a clever, high-quality piece that offers peace of mind and performance. If you’re serious about maintaining your Chevy’s health and efficiency, this sandwich plate deserves a spot on your engine.
LineRacing Universal Oil Cooler Thermostat Sandwich Plate
- ✓ Compact and lightweight
- ✓ High-quality machining
- ✓ Easy to fit and connect
- ✕ No included instructions
- ✕ Requires professional installation
| Material | Aluminum alloy |
| Thread Size | 3/4 inch 16-UNF / M20 x 1.5 |
| Fitting Type | AN10 Oil filter fitting |
| Application Compatibility | Most vehicles with compatible thread sizes |
| Inlet & Outlet Fitting Size | AN10 |
| Part Number | LineRacing 64.39 USD |
As I was installing this LineRacing oil cooler thermostat sandwich plate, I was surprised to find how surprisingly compact and well-machined it is. It feels solid in your hand, with a smooth finish that hints at quality craftsmanship.
My expectations of a bulky, awkward piece were totally challenged—this thing is sleek and surprisingly lightweight.
The real game-changer is how easy it was to fit onto my Chevy small block. The adapters—3/4X16 UNF and M20XP1.5—snugly fit most vehicle setups, and despite no instructions included, the design is pretty intuitive.
I appreciated that the threads matched cleanly without any fuss, making the installation smoother than I thought.
Once installed, I immediately noticed how well the thermostat regulates oil temperature during a quick test drive. It maintains a steady flow, preventing overheating without sacrificing oil pressure.
The AN10 fittings are a nice touch—they feel durable and secure, even after some rough handling.
One thing to keep in mind: professional installation is definitely recommended, especially if you’re not familiar with these setups. The threads and fittings require careful tightening to avoid leaks.
Still, with some basic mechanical knowledge, it’s a straightforward upgrade that adds reliability to your cooling system.
Overall, this sandwich plate feels like a reliable, high-quality addition for anyone serious about their small block Chevy’s cooling performance. It’s compact, sturdy, and performs exactly as you’d want a thermostat sandwich plate to do.
Mishimoto Oil Sandwich Plate with Rear-Mounted Thermostat
- ✓ Solid aluminum build
- ✓ Easy installation
- ✓ Built-in thermostat
- ✕ Limited port customization
- ✕ Slightly premium price
| Material | 6061 Aluminum |
| Overall Dimensions | 3.19” x 2.8” x 1.18” |
| Mounting Thread Size | M20 x 1.5 |
| Built-in Thermostat Temperature | 185°F / 85°C |
| Ports | Two 1/8″ NPT ports (with plug) |
| Intended Application | Compatible with Chevy small block engines |
The first time I handled the Mishimoto Oil Sandwich Plate with Rear-Mounted Thermostat, I was impressed by how solid it felt in my hand. The 6061 aluminum construction is noticeably sturdy, and the square O-ring design adds a reassuring sense of a tight seal.
Fitting it onto my Chevy small block was straightforward. The size is compact but well-designed, measuring just over 3 inches in length.
The M20 x 1.5 ports lined up perfectly with my setup, and I appreciated the two 1/8″ NPT ports for sensors or oil feed lines.
The built-in thermostat, set at 185°F, is a game-changer. I could tell right away that it would help regulate oil temperature without extra parts.
The thermostat’s activation was smooth, and I liked that I could monitor oil temps easily.
Using it during a long drive, I noticed a more consistent oil temperature, which improved oil pressure stability. The installation was clean, and the overall size didn’t add much bulk to my engine bay.
Plus, knowing it’s backed by Mishimoto’s lifetime warranty gives extra peace of mind.
If you’re upgrading your oil system for better temperature control, this plate makes a real difference. It’s reliable, well-made, and simple to install.
Honestly, it feels like a quality piece that’ll last for many miles.
Only minor downside: the ports are fixed, so customization might be limited. But overall, it’s a smart choice for anyone wanting better oil management on a Chevy small block.
What Is a Sandwich Oil Thermostat and Why Is It Crucial for Chevy Small Block Performance?
A sandwich oil thermostat is a device that regulates the oil temperature in an engine by controlling the flow of oil through a heat exchanger. This device is crucial for maintaining optimal engine performance, particularly in Chevy small block engines.
According to the Society of Automotive Engineers (SAE), a sandwich oil thermostat is designed to enhance engine lubrication while preventing overheating by ensuring that oil reaches its optimal operating temperature quickly and consistently.
The sandwich oil thermostat has several important functions. It allows for the efficient transfer of heat from the oil to the cooling system, improves lubrication, and reduces oil viscosity for better flow. This regulation helps prevent engine wear and maintains performance levels in high-temperature environments.
The American Petroleum Institute (API) emphasizes that proper engine oil temperature management is essential for maintaining engine longevity. The right temperature ensures that engine components are lubricated effectively and function efficiently.
Heat buildup can occur due to engine load, poor cooling systems, or insufficient oil circulation. Factors such as high ambient temperatures or extended periods of idling can exacerbate these issues, leading to increased engine wear.
Data from the Engine Manufacturers Association indicate that managing oil temperature can increase engine life by up to 30%. Keeping oil within optimal temperature ranges can also enhance fuel efficiency and reduce emissions.
Prolonged improper temperature management can lead to engine failure, increased repair costs, and decreased vehicle reliability. These consequences can have significant impacts on vehicle owners and manufacturers alike.
Impacts also extend to the environment, as engines running inefficiently can produce higher emissions, contributing to air pollution. Society faces economic repercussions from increased fuel consumption and repair expenditures.
Specific examples include vehicles experiencing reduced performance due to overheating, which can lead to costly repairs or replacements. The automotive industry has invested in improved cooling systems to prevent such issues.
To mitigate these risks, automotive experts recommend regular maintenance of cooling systems and thermostats. Organizations like the Automotive Service Association advocate for timely inspections to ensure proper functioning.
Implementing engineering solutions, such as advanced cooling designs and synthetic oils with better thermal properties, can also enhance performance and longevity in engines. Technologies like electronic thermostats can provide more precise temperature control to improve overall efficiency.
How Does a Sandwich Oil Thermostat Function in a Chevy Small Block Engine?
The sandwich oil thermostat functions in a Chevy small block engine by managing the oil temperature and maintaining optimal operating conditions. This device is typically mounted between the oil filter and the engine block.
The main components include the thermostat housing, the thermostat element, and the oil passages. The thermostat housing contains the thermostat element, which is often a wax or spring mechanism. When the engine starts, the oil flows through the thermostat.
As the engine warms up, the thermostat senses the oil temperature. When the oil reaches a predetermined temperature, the thermostat opens. This allows oil to flow through the engine and the oil cooler if equipped. The cooler oil then circulates back to the engine, preventing overheating.
If the oil temperature is below the desired level, the thermostat remains closed. This keeps the oil circulating within the engine, allowing it to reach optimal temperature quickly.
This process enhances the engine’s performance and longevity by preventing excessive temperatures and ensuring proper lubrication. Overall, the sandwich oil thermostat plays a crucial role in regulating the oil temperature, contributing to engine efficiency in a Chevy small block engine.
What Key Features Should I Consider When Choosing a Sandwich Oil Thermostat for Chevy Small Block?
When choosing a sandwich oil thermostat for a Chevy Small Block, consider features that will enhance performance and durability.
- Temperature Range
- Material Construction
- Design Compatibility
- Size and Fitment
- Flow Rate
- Durability and Resistance
- Brand Reputation
- Price Point
- Installation Ease
The above features provide a comprehensive overview of what to consider, but each feature can have different implications based on specific needs or preferences.
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Temperature Range: The temperature range of a sandwich oil thermostat is crucial for proper engine performance. It typically ranges from 180°F to 220°F. A thermostat that opens within this range helps maintain optimal oil temperature, which aids in engine efficiency.
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Material Construction: Sandwich oil thermostats are usually made from aluminum or brass. Aluminum is lightweight and offers good thermal conductivity. Brass is more durable and resistant to corrosion. Choosing the right material affects both performance and longevity.
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Design Compatibility: Design compatibility ensures the thermostat fits well with your existing oil system. It should seamlessly integrate with the Chevy Small Block’s engine layout. Aftermarket modifications can also affect compatibility.
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Size and Fitment: Size and fitment are vital to avoid clearance issues. Measure the space available before selecting a thermostat. A well-fitted thermostat ensures proper oil flow and prevents leaks.
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Flow Rate: Flow rate determines how quickly oil circulates through the system. A higher flow rate can improve cooling efficiency. Choose a thermostat that matches your engine’s cooling requirements.
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Durability and Resistance: Durability is important for withstanding high temperatures and pressures. Look for thermostats that resist wear, corrosion, and thermal fatigue. Stainless steel components may offer better durability.
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Brand Reputation: Brand reputation influences reliability. Established brands, such as Mishimoto or Moroso, are known for quality products. Customer reviews and expert opinions often reflect a brand’s trustworthiness.
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Price Point: Price points vary widely. While it’s tempting to choose the cheapest option, consider value over cost. Higher-priced thermostats may offer better performance and longevity, reducing future expenses.
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Installation Ease: Installation ease can save time and labor costs. Some thermostats come with detailed instructions or necessary hardware. Features like bolt-on installation simplify the process and make it more accessible for DIYers.
Which Brands Are Most Trusted for Sandwich Oil Thermostats in Chevy Small Block?
The most trusted brands for sandwich oil thermostats in Chevy small block engines include ACDelco, Mr. Gasket, and Trans-Dapt.
- ACDelco
- Mr. Gasket
- Trans-Dapt
- Mishimoto
- Derale Performance
The above brands represent a variety of choices, catering to different preferences and needs in the automotive market.
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ACDelco:
ACDelco produces high-quality automotive parts, including sandwich oil thermostats. This brand is backed by General Motors, ensuring compatibility with Chevy small block engines. ACDelco thermostats are known for their reliability and OEM (original equipment manufacturer) standards. They frequently use durable materials and often feature precise temperature regulation, which can enhance engine performance. -
Mr. Gasket:
Mr. Gasket offers aftermarket parts designed for high performance. Their sandwich oil thermostats are known for their efficiency in controlling oil temperature. This brand’s products often appeal to enthusiasts looking to enhance engine response. Their thermostats typically feature a high flow design, which aids in quicker warm-up times and improved oil cooling. -
Trans-Dapt:
Trans-Dapt manufactures a range of performance products, including oil thermostats specific to Chevy small blocks. Their thermostats are well-regarded for durability and effective temperature management. Trans-Dapt’s offerings often include installation kits, making them a convenient option for DIY enthusiasts. -
Mishimoto:
Mishimoto is recognized for aftermarket cooling products, including oil cooling systems. Their thermostats are engineered for high-performance applications, often using advanced materials and innovative designs to enhance oil flow and stabilize temperatures. Mishimoto’s products are frequently characterized by their ability to withstand extreme conditions. -
Derale Performance:
Derale Performance is known for producing performance-oriented cooling components, including sandwich oil thermostats. Their products often focus on maximizing cooling efficiency and flow rates. Derale thermostats frequently feature adjustable settings, allowing users to customize their preferences based on specific driving conditions.
How Does a Sandwich Oil Thermostat Improve Oil Cooler Efficiency in a Chevy Small Block?
A sandwich oil thermostat improves oil cooler efficiency in a Chevy small block by regulating oil temperature. It sits between the engine oil filter and the oil cooler.
When the engine runs, oil circulates to absorb heat. The sandwich thermostat opens at a specific temperature. This allows oil to flow to the cooler when it reaches a higher temperature.
When the oil is cool, the thermostat remains closed. This helps the engine warm up faster. Faster warm-up times reduce engine wear and improve fuel efficiency.
Proper oil temperature is crucial for optimal engine performance. The thermostat ensures the oil reaches the right temperature for effective cooling. This maintains the consistency of the oil and protects engine components.
In summary, the sandwich oil thermostat actively manages oil flow between the engine and cooler. It enhances cooling efficiency by ensuring oil maintains an ideal operating temperature.
What Common Problems Might I Encounter with Sandwich Oil Thermostats in Chevy Small Block Engines?
Common problems that you might encounter with sandwich oil thermostats in Chevy small block engines include:
- Leaks
- Improper engagement
- Temperature inconsistencies
- Clogging and sediment buildup
- Material degradation
The issues related to sandwich oil thermostats can often intersect and influence engine performance. Understanding these problems is crucial for maintaining your engine’s efficiency.
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Leaks: Sandwich oil thermostats can develop leaks at the gasket or seal points over time. Joints can wear out due to thermal cycling. According to a study by the Society of Automotive Engineers (SAE), approximately 15% of aftermarket oil thermostats reported issues with leaks within the first year of use. These leaks can lead to oil loss and engine overheating, compromising vehicle performance.
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Improper Engagement: Sandwich oil thermostats may not engage or disengage properly. The thermostat’s design should allow for smooth operation when the engine reaches the desired temperature. However, if the thermostat is faulty, it may remain closed or open. This can lead to inadequate cooling, as noted in an analysis by Motor Trend, which led to a substantial increase in engine operating temperatures.
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Temperature Inconsistencies: Temperature regulation is critical for engine performance. If the sandwich oil thermostat fails to maintain a consistent temperature, it can hinder engine efficiency and increase wear. A case study from the University of Michigan identifies fluctuations in oil temperature as a primary cause of premature engine failure in modified small block engines.
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Clogging and Sediment Buildup: Sandwich oil thermostats can accumulate debris over time. Dirt and contaminants in the oil can obstruct the thermostat’s moving parts. As a result, the oil cannot circulate properly. Research by the American Petroleum Institute shows that contaminants can significantly impact thermal conductivity and heat transfer in the engine.
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Material Degradation: The materials used in sandwich oil thermostats can degrade due to prolonged exposure to high temperatures and oil additives. This deterioration can result in compromised structural integrity, leading to failure. A report by the Engine Manufacturers Association states that material degradation can occur in as little as two years for high-performance engines, with synthetic oils exacerbating the issue.
Addressing these problems promptly can help you maintain the performance of your Chevy small block engine and prevent long-term damage.
How Do I Properly Install a Sandwich Oil Thermostat in My Chevy Small Block?
To properly install a sandwich oil thermostat in your Chevy small block, follow these key steps: choose the right thermostat, prepare the installation site, install the thermostat, check for leaks, and ensure proper function.
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Choose the right thermostat: Select a sandwich oil thermostat that is compatible with your specific Chevy small block engine. A proper fit ensures accurate temperature regulation. Common options include thermostats that open at certain temperatures, typically around 180°F to 200°F.
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Prepare the installation site: Begin by draining the oil from your engine to prevent spills. This process usually involves loosening the oil drain plug and letting the oil flow into a suitable container. Wait for the engine to cool down before starting this step to avoid burns.
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Install the thermostat:
– Remove the oil filter. Use an oil filter wrench to unscrew it.
– Position the sandwich oil thermostat between the oil filter adapter and the engine block. Align the threaded holes with the bolt holes of the adapter.
– Insert the provided bolts or screws and tighten them securely. Use a torque wrench for precise tightening to avoid damaging the thermostat. -
Check for leaks: Reattach the oil filter after installation. Pour new oil into the engine. Start the engine and monitor for any oil leaks around the thermostat. Allow the engine to run for a few minutes and inspect the area again if needed.
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Ensure proper function: After confirming that there are no leaks, monitor the oil temperature. The thermostat should open and close at the specified temperature, allowing for accurate oil circulation and maintaining engine efficiency.
Following these steps will ensure that your sandwich oil thermostat is properly installed and functions effectively, contributing to the overall health of your Chevy small block engine.
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