Stant 27279 Thermostat Seal – Fitment Guide for Ford, Mazda, Merkur, Suzuki (1986–1994)
Ford, Mazda, Merkur, Suzuki (1986–1994)
Stant 27279 Engine Coolant Thermostat Seal – from Don's Obsolete Auto Parts
Keep your car or truck on the road with a genuine Stant 27279, the Stant thermostat seal for Ford 2.9L and 4.0L V6 trucks (1986–1994 Ranger, Bronco II, Aerostar, Explorer), Mazda Navajo and B4000, the Merkur Scorpio, and the 1990–1991 Suzuki Sidekick 1.6L. A thermostat seal is a molded rubber ring that seals the thermostat or the water outlet instead of a flat paper gasket. Stant's description of these seals: no sealer or RTV is needed, and each one is shaped for its application.
Key Features
- Part Number: Stant 27279 (single pack); same seal as Stant 25279 in the Stant catalog
- Type: Engine coolant thermostat / water outlet seal (rubber, grooved, molded style per the Gates equivalent)
- Size: about 1.82 in. inside diameter × 2.2 in. outside diameter × 0.25 in. thick (Gates 33608 data for the direct equivalent)
- Cross-references: Gates 33608; Carquest 30701; Fel-Pro 35404; Ford E6TZ 8255 A, F6ZZ 8A571 A, W700319 S300; Ideal Tridon 30982; Mazda ZZL015173; McCord 74-0141; Motorad MG29
Stant's own 1928–1994 application catalog lists the 27279 for 4 makes from 1986 to 1994. It's a good fit for restoration projects, weekend drivers and mechanics keeping older vehicles running.
Compatible Makes & Models (from the Stant catalog)
- Ford (1986–1994): Aerostar (1990–1994), Bronco Compact (Bronco II) (1986–1990), Explorer (1991–1994), Ranger (1986–1994)
- Mazda (1991–1994): B4000 Pickup (1994), Navajo (1991–1994)
- Merkur (1988–1989): Scorpio (1988–1989)
- Suzuki (1990–1991): Sidekick (1990–1991)
Note: Always verify fitment for your specific year, make, model and engine. Some catalog lines are limited to one engine code or housing type; the full engine-by-engine list is in the fitment appendix below. If you have your old seal, compare its size and shape, or just ask Don and Kathy.
Price is $9.95 plus $3.00 for shipping. Don and Kathy offer a fair deal for this. Buying for a club, a shop, or a whole fleet of project cars? Even better.
Why Buy From Don & Kathy at Don's Obsolete Auto Parts? Don Leask founded one of the earliest online obsolete auto parts businesses (carparts2 on eBay in 1997, the second auto parts store on eBay) and grew it to 11,000–17,000 unique listings. Today, with help from their digital agent Misty ([email protected]), Don and Kathy connect directly with restorers and collectors while preserving their legacy of quality parts. These seals come from Don's own shelves.
To reach them, click the "Don & Kathy Leask" button at the bottom left of any page on donsobsoleteautoparts.com, or email [email protected].
The Stant 27279 Thermostat Seal: The Right Seal for Ford and Mazda Owners
Thermostat seals are small, but they decide whether a cooling system stays dry. When the thermostat housing comes off, the right seal is the quiet part that keeps the job from turning into a second trip to the parts counter.
Why This Seal Matters Stant's application catalog covering 1928 through 1994 lists the 27279 across 4 makes (Ford, Mazda, Merkur, Suzuki). Cross-reference tables tie it to the Stant 25279 and Gates 33608, which makes it easy to match against an old parts list or a worn-out seal.
Real-World Fitment Examples
- 1990–1994 Ford Aerostar V-6 4.0L
- 1994 Mazda B4000 Pickup V-6 4.0L
- 1988–1989 Merkur Scorpio V-6 2.9L
- 1990–1991 Suzuki Sidekick 4-Cyl. 1.6L
Keeping Older Cars on the Road Don and Kathy Leask have been part of the classic car world since the early days of the internet. Starting with carparts2 on eBay in 1997, they became one of the largest online sellers of obsolete parts. Now, with their Don's Obsolete Auto Parts site and digital agent Misty, they're making hard-to-find parts discoverable again, connecting owners of rare inventory with the enthusiasts who need them.
Buying Tips
- Match three things before ordering: year, model and engine. Watch for catalog notes such as engine VIN codes or housing type.
- Compare sizes: the 27279 is about 1.82 in. inside diameter × 2.2 in. outside diameter × 0.25 in. thick.
- Some engines use a gasket and a seal at the thermostat; check what came off yours.
- Restoration shops, clubs and collectors can ask about quantity pricing.
Fitment appendix — every Stant catalog line for
27279
Source: Stant Thermostats, Gaskets, Caps – 1928 through 1994 (application pages). Format: Model — years [engine: years (catalog notes)]. Catalog coverage ends with 1994 models.
Ford
- Aerostar — 1990–1994 [V-6 4.0L: 1990–1994]
- Bronco Compact (Bronco II) — 1986–1990 [V-6 2.9L: 1986–1990]
- Explorer — 1991–1994 [V-6 4.0L: 1991–1994]
- Ranger — 1986–1994 [V-6 2.9L: 1986–1992 | V-6 4.0L: 1990–1994]
Mazda
- B4000 Pickup — 1994 [V-6 4.0L: 1994]
- Navajo — 1991–1994 [V-6 4.0L: 1991–1994]
Merkur
- Scorpio — 1988–1989 [V-6 2.9L: 1988–1989]
Suzuki
- Sidekick — 1990–1991 [4-Cyl. 1.6L: 1990–1991 (1990–1991: Use either gasket or seal to match OE design.)]
Cross-references (full)
- Gates: 33608
- Carquest: 30701
- Fel-Pro: 35404
- Ford: E6TZ 8255 A, F6ZZ 8A571 A, W700319 S300
- Ideal Tridon: 30982
- Mazda: ZZL015173
- McCord: 74-0141
- Motorad: MG29
- Motorcraft: RG-558
- NAPA: 1087
- Pep Boys: 35404
- Standard Thomson: 1087
- Stant equivalents: 25279, 30982, C79
Sources
- Stant Thermostats, Gaskets, Caps – 1928 through 1994 catalog (scan on Internet Archive): https://archive.org/details/StantThermostatsGasketsCaps1928Through1994OCR637Pages — part-number index ("Make / Year(s)" table at the back of the catalog) and application pages (PDF pages 429, 430, 436, 453, 503, 504, 524, 612). Every catalog line pairs "Thermostat Seal 25279" with "Thermostat Seal (1 Pack) 27279".
- PartsHawk – Gates 33608 (interchange lists Stant 27279; style and dimensions): https://partshawk.com/gates-33608-engine-coolant-thermostat-seal.html
- AutoPartsPrime – Stant 27279 ("Engine Coolant Thermostat Seal"; UPC 033342072794; vehicle list): https://www.autopartsprime.com/stant/engine-coolant-thermostat-seal/mp-27279