Engine Coolant Thermostat Guide for the 1962-1968 Jeep Gladiator
Keep your classic Gladiator's Tornado engine running at the right temperature with a reliable new thermostat.
- A failing thermostat can cause serious engine damage from overheating or poor performance from overcooling.
- For this vintage Gladiator, all available parts are aftermarket; choose a trusted brand like Gates or Crown Automotive over the cheapest option.
- This is a simple and inexpensive DIY repair that requires basic tools and about an hour of time.
- Always replace the thermostat gasket and test the new part in hot water before installation to ensure it works correctly.
Is Your Gladiator's Thermostat Failing?
A thermostat is a wear item. After decades of service, it's common for the original part to fail. A failure can happen in two ways: stuck open or stuck closed. Both can cause problems for your classic Jeep.
Common Failure Symptoms
- Engine Overheating: If the thermostat sticks closed, it traps coolant in the engine block. The temperature gauge will climb into the red, and you may see steam or hear gurgling noises. This is a serious condition that can cause severe engine damage.
- Engine Slow to Warm Up: If the thermostat sticks open, coolant constantly circulates through the radiator. This makes it difficult for the engine to reach its proper operating temperature, especially in colder weather. Your heater may also blow lukewarm air.
- Erratic Temperature Gauge: A faulty thermostat can open and close at the wrong times, causing the temperature gauge on your dash to swing back and forth unpredictably.
- Poor Fuel Economy: An engine that runs too cool is inefficient. It uses more fuel than necessary because it never reaches its optimal temperature.
Choosing the Right Aftermarket Thermostat
For a vintage vehicle like the 1962-1968 Gladiator, finding a "New OEM" part from Jeep is nearly impossible. The market consists of aftermarket replacements. Thankfully, many reputable brands produce quality thermostats that meet or exceed original specifications. The key is to choose a trusted brand rather than the cheapest option available.
Aftermarket Brand Tiers
Your Gladiator deserves a part you can trust. Here’s a breakdown of the available brands, from reliable workhorses to performance options.
Tier 1: Trusted OE-Quality Brands
- Gates: A top-tier manufacturer for cooling system components. Gates is widely trusted by professional mechanics and is generally considered a very safe and reliable choice.
- Crown Automotive: Specializing in parts for Jeep vehicles, Crown is a go-to for many Jeep enthusiasts. They focus on creating parts that fit and function like the originals, making them an excellent choice for your Gladiator.
Tier 2: Large Aftermarket & Performance Brands
- Motorad: Motorad is one of the largest thermostat manufacturers in the world and even produces parts for some carmakers. While many users have good experiences, some have reported early failures. They are a budget-friendly option that often gets the job done, but quality can be inconsistent.
- Edelbrock & Mr. Gasket: These are performance-focused brands. They may offer thermostats with different temperature ratings (e.g., 180°F instead of the stock 195°F) for specific tuning needs. For a stock restoration, it's best to stick with the factory temperature rating.
Pro Tip: Test Before You Install
No matter which brand you choose, it's a wise practice to test the new thermostat before installing it. Simply place it in a pot of water on the stove with a thermometer. Watch to see that it opens as the water approaches the rated temperature (e.g., 180°F or 195°F). This simple step can save you from having to do the job twice.
Estimated Replacement Costs
Replacing the thermostat on a 1960s Gladiator is a straightforward job. The part is inexpensive and labor is minimal.
| Part Type | Estimated Cost |
|---|---|
| New Aftermarket Thermostat | $7.93 - $56.13 |
| Shop Labor | $90 - $150 |
| Total Estimated Cost | $98 - $206 |
Note: Costs are estimates and will vary based on your location and chosen parts.
Frequently Asked Questions
Is there a recall on the 1962-1968 Jeep Gladiator thermostat?
No. There are no active recalls or Technical Service Bulletins (TSBs) from the NHTSA for the engine coolant thermostat on the 1962-1968 Jeep Gladiator. The NHTSA database primarily covers vehicles from the 1970s onward.
Should I get a 180°F or 195°F thermostat?
For most stock applications, using the factory-specified 195°F thermostat is recommended to ensure the engine runs at its most efficient temperature. A lower temperature thermostat, like a 180°F model, may be used in certain performance or hot-climate situations but can reduce fuel efficiency.
Can I replace the thermostat myself?
Yes, this is a very DIY-friendly job for a home mechanic. The thermostat is typically located where the upper radiator hose connects to the engine. The process involves draining some coolant, unbolting the housing, swapping the thermostat and gasket, and reassembling. Always make sure the surface is clean before installing the new gasket to prevent leaks.
Do I need to replace the gasket too?
Absolutely. Never reuse an old thermostat gasket. A new gasket is essential for creating a proper seal and preventing coolant leaks. Most new thermostats come with a new gasket in the box.
Technical Specifications
Fits 1962-1968 Jeep Gladiator models, primarily with the 230ci 'Tornado' OHC engine. Standard temperature ratings are typically 180°F or 195°F.
We Have This Part in Stock
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.