Gates 33009S thermostat for the 1987-1990 Jeep Wrangler 6-cylinder 4.2L, the 1987-1995 Wrangler 4-cylinder 2.5L, the 1991-1995 Wrangler 6-cylinder 4.0L and other vehicles and equipment regulates how coolant flows through the engine. Also called an engine coolant thermostat, it stays closed while the engine warms up and opens to let coolant reach the radiator.
- Heavy gauge stainless steel construction for corrosion resistance
- Upgraded spring for temperature stability under normal operating conditions
- Upgraded thermal valve that prevents thermal shock to cooling system components
- Specially formulated wax mixture that reacts quickly to changes in coolant temperature
- Reverse poppet design that starts to open at 195°F (91°C)
- Well-suited for severe duty and high-performance applications
Quick facts
- Part: Gates 33009S thermostat
- Also called: engine coolant thermostat
- Fits: the 1987-1990 Jeep Wrangler 6-cylinder 4.2L, the 1987-1995 Wrangler 4-cylinder 2.5L, the 1991-1995 Wrangler 6-cylinder 4.0L and other vehicles and equipment
- Material: Stainless Steel, Copper
- Condition: New
A thermostat that sticks open or closed can show up as an engine that overheats, runs cold or is slow to warm up. Before you replace the thermostat, rule out a coolant leak, a weak radiator cap or a faulty temperature sensor, since each of those can also send the gauge high or low. The 1991-1995 Jeep Wrangler 6-cylinder 4.0L takes one thermostat.
Fits
It is a direct-fit thermostat for the 1992-1995 GMC Yukon V8 5.7L and for the 1975-1976 Ford F-150 V8 5.9L or 6.4L, the 1975-1979 F-150 V8 7.5L, the 1975-1995 F-150 6-cylinder 4.9L or V8 5.0L, the 1977-1979 F-150 V8 5.8L and the 1982-1995 F-150 V8 5.8L, as well as the Wranglers above.
Specifications
Fit and size
- Quantity per vehicle: 1
- Start to open temperature: 195°F (91°C)
- Sealing flange outside diameter: 2.12 in
- Height: 1.56 in
- Flange height: 0.76 in
- Height between flanges: 0.8 in
- Flange thickness: 0.05 in
Build and materials
- Design: reverse poppet
- Type: premium thermostat
- Grade type: OE Improved
- Material: stainless steel, copper
- Condition: new
- Country of origin: China
In the box
One thermostat. No gasket, seal or installation tool is included.
Interchange: 2000-195 · 2044-192
3015433 · 3156283 · 3192166 · 3203275 · 4488422 · 4488471 · 8123420 · 8127383 · 8983500360 · 905594 · 944667 · 60209 · 2843210 · 3780112 · AT10906 · AT22963 · AT24013 · 530090 · 34109 · 45359 · 59359 · 65359
This part cross-references / interchanges with the following part numbers:
3015433, 3156283, 3192166, 3203275, 4488422, 4488471, 8123420, 8127383, 8983500360, 905594, 944667, 60209, 2843210, 3780112, AT10906, AT22963, AT24013, 2000-195, 2044-192, 530090, 33009S, 34109, 45359, 59359, 65359
Frequently Asked Questions
Is the Gates 33009S the right thermostat for a 1991-1995 Jeep Wrangler 6-cylinder 4.0L?
Yes. Gates 33009S fits the 1991-1995 Jeep Wrangler 6-cylinder 4.0L, the 1987-1990 Wrangler 6-cylinder 4.2L and the 1987-1995 Wrangler 4-cylinder 2.5L; for other vehicles, look up your own car in the "Vehicles it fits" section.
Does the Gates 33009S thermostat come with a gasket or seal?
No. The Gates 33009S thermostat lists zero gaskets and zero seals, and no installation tool is included, so those are bought separately.
At what temperature does this Gates Premium thermostat start to open?
It starts to open at 195°F (91°C). The valve is a reverse poppet design.
Which symptoms can a worn Gates 33009S thermostat show?
An engine that runs hot, takes a long time to warm up or has a temperature gauge that swings can mean the thermostat is not opening or closing as it should. A shop can test it.
What do the wax mixture and thermal valve do in this Gates Premium thermostat?
The specially formulated wax mixture reacts quickly to changes in coolant temperature, and the upgraded thermal valve prevents thermal shock to cooling system components.
