OE Quality
60-Day Returns

Gates 33948 Engine Coolant Thermostat
Reliable Engine Cooling with Gates OE Type Thermostat 33948
The Gates OE Type Thermostat 33948 is engineered to maintain optimal engine temperature for Ford, Jaguar, and Lincoln vehicles. Designed with durable stainless steel and copper materials, this engine coolant thermostat ensures precise temperature regulation and reliable performance.
- Constructed from stainless steel and copper for durability
- Bottom by-pass design with jiggle pin weep hole for effective coolant flow
- O-ring seal type with rubber seal material for leak prevention
- Start to open temperature at 183°F (84°C) for accurate thermal control
- Compatible with Ford Thunderbird, Lincoln LS, Jaguar XJ8, XK8, and other models
About the Gates OE Type Thermostat Product Line
The OE Type Thermostat line by Gates is designed to meet original equipment performance standards. This product line focuses on delivering thermostats that match the exact specifications and quality of factory-installed parts. The 33948 thermostat exemplifies this approach by providing OE performance ratings and precise fitment for select Ford, Jaguar, and Lincoln models.
Detailed Product Description
The Gates 33948 thermostat features a bottom by-pass design that allows coolant to circulate efficiently during engine warm-up, reducing wear and improving fuel efficiency. Its stainless steel and copper construction offers corrosion resistance and long service life. The thermostat includes a jiggle pin weep hole to prevent air locks and ensure smooth coolant flow. With a sealing flange outside diameter of 2.63 inches and an O-ring seal, it provides a secure, leak-free fit. The thermostat opens at 183°F (84°C), maintaining optimal engine temperature for reliable operation.
Common Applications and Problem Solving
- Prevents engine overheating by regulating coolant flow
- Eliminates coolant leaks with durable O-ring seal
- Reduces engine warm-up time for improved efficiency
- Prevents air locks with integrated jiggle pin weep hole
- Ensures proper fitment for Ford Thunderbird, Jaguar XF, and Lincoln Vanden Plas models
Installation Notes and Tips
The Gates 33948 thermostat does not include an installation tool, so ensure you have the appropriate tools for removal and installation. Verify the correct orientation of the bottom by-pass design during installation. Inspect the housing and gasket surfaces for cleanliness to ensure a proper seal. Replacement is recommended when the engine shows signs of overheating or inconsistent temperature regulation.
Quality Assurance and Warranty
Gates OE Type Thermostats are manufactured to meet or exceed OEM specifications, ensuring reliable performance and durability. This thermostat carries an OE comparison rating, confirming its suitability as a direct replacement part. While specific warranty details are not provided, Gates products typically come with manufacturer-backed quality assurance to support long-term use.
| Brand | Gates |
| Part Number | 33948 |
| Position | OE Type Thermostat |
| .71 | |
| 1 | |
| 1 | |
| 1.38 | |
| 1.43 | |
| By-Pass Flange Diameter (in) | 1.38 |
| Design | Bottom By-Pass |
| Design | Bottom By-Pass |
| Flange Thickness | .05 |
| Gasket Quantity | 0 |
| Height | 1.81 |
| Height | 4.75 |
| Height Between Flanges | 1.1 |
| Height Between Flanges | 3.33 |
| Height from Flange (in) | .71 |
| Includes Installation Tool | No |
| Installation Tool Included | No |
| Jiggle Pin Weep Hole | Yes |
| Material | Stainless Steel, Copper |
| Material | Steel, Copper |
| Number of Gaskets | 0 |
| Number of Jiggle Pins/Check Valves | 1 |
| Number of Seals | 1 |
| OE Comparison Rating | OE Performance |
| Seal Material | Rubber |
| Seal Type | O-Ring |
| Sealing Flange Outside Diameter | 2.63 |
| Start to Open Temperature | 84 |
| Start to Open Temperature | 183 |
| Type | OE Type Thermostat |
This part fits 64 vehicles. Search below:
| Year | Make | Model | Liters | Cylinders | Fuel Type | Position | Notes |
|---|---|---|---|---|---|---|---|
| 2010 | Jaguar | XF | 4.2L | V8 | GAS | N/A | 183 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2009 | Jaguar | Super V8 | 4.2L | V8 | GAS | N/A | Excludes Housing; 183 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2009 | Jaguar | Vanden Plas | 4.2L | V8 | GAS | N/A | Excludes Housing; 183 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2009 | Jaguar | XF | 4.2L | V8 | GAS | N/A | 183 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2009 | Jaguar | XJ8 | 4.2L | V8 | GAS | N/A | Excludes Housing; 183 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2009 | Jaguar | XJR | 4.2L | V8 | GAS | N/A | Excludes Housing; 183 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2009 | Jaguar | XK | 4.2L | V8 | GAS | N/A | 183 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2009 | Jaguar | XKR | 4.2L | V8 | GAS | N/A | Excludes Housing; 183 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2008 | Jaguar | S-Type | 4.2L | V8 | GAS | N/A | Excludes Housing; 183 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2008 | Jaguar | Super V8 | 4.2L | V8 | GAS | N/A | Excludes Housing; 183 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2008 | Jaguar | XJR | 4.2L | V8 | GAS | N/A | Excludes Housing; 183 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2008 | Jaguar | XKR | 4.2L | V8 | GAS | N/A | Excludes Housing; 183 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2007 | Jaguar | S-Type | 4.2L | V8 | GAS | N/A | Excludes Housing; 183 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2007 | Jaguar | Super V8 | 4.2L | V8 | GAS | N/A | Excludes Housing; 183 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2007 | Jaguar | XJR | 4.2L | V8 | GAS | N/A | Excludes Housing; 183 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2007 | Jaguar | XKR | 4.2L | V8 | GAS | N/A | Excludes Housing; 183 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2006 | Jaguar | S-Type | 4.2L | V8 | GAS | N/A | Excludes Housing; 183 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2006 | Jaguar | Super V8 | 4.2L | V8 | GAS | N/A | Excludes Housing; 183 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2006 | Jaguar | XJR | 4.2L | V8 | GAS | N/A | Excludes Housing; 183 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2006 | Jaguar | XKR | 4.2L | V8 | GAS | N/A | Excludes Housing; 183 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2005 | Jaguar | S-Type | 4.2L | V8 | GAS | N/A | Excludes Housing; 183 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2005 | Jaguar | Super V8 | 4.2L | V8 | GAS | N/A | Excludes Housing; 183 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2005 | Jaguar | XJR | 4.2L | V8 | GAS | N/A | Excludes Housing; 183 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2005 | Jaguar | XKR | 4.2L | V8 | GAS | N/A | Excludes Housing; 183 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2004 | Jaguar | S-Type | 4.2L | V8 | GAS | N/A | Excludes Housing; 183 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2004 | Jaguar | XJR | 4.2L | V8 | GAS | N/A | Excludes Housing; 183 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2004 | Jaguar | XKR | 4.2L | V8 | GAS | N/A | Excludes Housing; 183 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2003 | Ford | Thunderbird | 3.9L | V8 | GAS | N/A | Oct. 31 & Older; Excludes Housing; 183 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2003 | Jaguar | S-Type | 4.2L | V8 | GAS | N/A | Excludes Housing; 183 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2003 | Jaguar | Vanden Plas | 4.0L | V8 | GAS | N/A | Excludes Housing; 183 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2003 | Jaguar | XJ8 | 4.0L | V8 | GAS | N/A | Excludes Housing; 183 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2003 | Jaguar | XJR | 4.0L | V8 | GAS | N/A | Excludes Housing; 183 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2003 | Jaguar | XKR | 4.2L | V8 | GAS | N/A | Excludes Housing; 183 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2003 | Lincoln | LS | 3.9L | V8 | GAS | N/A | Oct. 31 & Older; Excludes Housing; 183 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2002 | Ford | Thunderbird | 3.9L | V8 | GAS | N/A | Excludes Housing; 183 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2002 | Jaguar | S-Type | 4.0L | V8 | GAS | N/A | Excludes Housing; 183 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2002 | Jaguar | Vanden Plas | 4.0L | V8 | GAS | N/A | Excludes Housing; 183 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2002 | Jaguar | XJ8 | 4.0L | V8 | GAS | N/A | Excludes Housing; 183 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2002 | Jaguar | XJR | 4.0L | V8 | GAS | N/A | Excludes Housing; 183 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2002 | Jaguar | XK8 | 4.0L | V8 | GAS | N/A | Excludes Housing; 183 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2002 | Jaguar | XKR | 4.0L | V8 | GAS | N/A | Excludes Housing; 183 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2002 | Lincoln | LS | 3.9L | V8 | GAS | N/A | Excludes Housing; 183 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2001 | Jaguar | S-Type | 4.0L | V8 | GAS | N/A | Excludes Housing; 183 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2001 | Jaguar | Vanden Plas | 4.0L | V8 | GAS | N/A | Excludes Housing; 183 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2001 | Jaguar | XJ8 | 4.0L | V8 | GAS | N/A | Excludes Housing; 183 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2001 | Jaguar | XJR | 4.0L | V8 | GAS | N/A | Excludes Housing; 183 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2001 | Jaguar | XK8 | 4.0L | V8 | GAS | N/A | Excludes Housing; 183 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2001 | Jaguar | XKR | 4.0L | V8 | GAS | N/A | Excludes Housing; 183 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2001 | Lincoln | LS | 3.9L | V8 | GAS | N/A | Excludes Housing; 183 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2000 | Jaguar | S-Type | 4.0L | V8 | GAS | N/A | Excludes Housing; 183 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2000 | Jaguar | Vanden Plas | 4.0L | V8 | GAS | N/A | Excludes Housing; 183 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2000 | Jaguar | XJ8 | 4.0L | V8 | GAS | N/A | Excludes Housing; 183 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2000 | Jaguar | XJR | 4.0L | V8 | GAS | N/A | Excludes Housing; 183 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2000 | Jaguar | XK8 | 4.0L | V8 | GAS | N/A | Excludes Housing; 183 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2000 | Jaguar | XKR | 4.0L | V8 | GAS | N/A | 183 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2000 | Lincoln | LS | 3.9L | V8 | GAS | N/A | Excludes Housing; 183 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 1999 | Jaguar | Vanden Plas | 4.0L | V8 | GAS | N/A | Excludes Housing; 183 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 1999 | Jaguar | XJ8 | 4.0L | V8 | GAS | N/A | Excludes Housing; 183 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 1999 | Jaguar | XJR | 4.0L | V8 | GAS | N/A | Excludes Housing; 183 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 1999 | Jaguar | XK8 | 4.0L | V8 | GAS | N/A | Excludes Housing; 183 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 1998 | Jaguar | XJ8 | 4.0L | V8 | GAS | N/A | Excludes Housing; 183 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 1998 | Jaguar | XJR | 4.0L | V8 | GAS | N/A | Excludes Housing; 183 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 1998 | Jaguar | XK8 | 4.0L | V8 | GAS | N/A | Excludes Housing; 183 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 1997 | Jaguar | XK8 | 4.0L | V8 | GAS | N/A | Excludes Housing; 183 Degree; OE Temperature; Seal included; OE Type Thermostat |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.