--- id: 20261004_190000_stant-27174-thermostat-gasket-fitment-guide title: Stant 27174 Thermostat Gasket (Stat Lok, NOS) – Fitment Guide for Ford, Mazda, Mercury, Merkur (1978–1994) category: Parts Catalog corpus_topic: PartsCatalog site_category: Parts Catalog summary: Find the exact vehicles that fit the Stant 27174 Stat Lok thermostat gasket (also 25174, B74, Gates 33645). NOS inventory from Don's Obsolete Auto Parts (donsobsoleteautoparts.com). Verify year, model and engine before you order. Price is $9.95 plus shipping. description: Find the exact vehicles that fit the Stant 27174 Stat Lok thermostat gasket (also 25174, B74, Gates 33645). NOS inventory from Don's Obsolete Auto Parts (donsobsoleteautoparts.com). Verify year, model and engine before you order. Price is $9.95 plus shipping. question: Which vehicles does the Stant 27174 thermostat gasket fit, and where can I buy one? keypoints: - 'Part Number: Stant 27174 (single pack); same gasket as Stant 25174 / B74 in the Stant catalog and cross-reference tables' - 'Thermostat opening (mounting hole) diameter: 1.75 in. (per Gates/retailer data for the direct equivalent)' - Stant 1928–1994 catalog lists it for 4 make(s), 1978–1994 - Price is $9.95 plus shipping tags: - stant - stant-27174 - thermostat-gasket - stat-lok - restoration-parts - obsolete-auto-parts - fitment-guide - ford - mazda - mercury - merkur consent: true agent: misty created: '2026-10-05T02:38:49Z' updated: '2026-10-05T02:38:49Z' date: '2026-10-04' vault_stage: 07_CODEX enrich_status: ok enrich_method: bot enrich_blockers: [] pipeline_filename: stant-27174-thermostat-gasket-fitment-guide.md source_kind: authored proposed_topic: PartsCatalog lane: PartsCatalog content_status: approved routing_source: carbon prefix: misty headwaters: misty voice: misty active_voice: misty voices: - misty asker_site: donsobsoleteautoparts.com sample: false sentiment: helpful emotions: - reassured - confident sycophancy: 0 truth_score: 9 entropy: 3 predicted_narrative_arc: owner-searching-to-part-found share_url: https://donsobsoleteautoparts.com/kb/PartsCatalog/stant-27174-thermostat-gasket-fitment-guide.md source_url: '' part_number: Stant 27174 approved_by: Daniel Comp (chat, 2026-10-04 ~7:00 PM PT) --- # Stant 27174 Thermostat Gasket (Stat Lok, NOS) – Fitment Guide for Ford, Mazda, Mercury, Merkur (1978–1994) **Stant 27174 Stat Lok Engine Coolant Thermostat Gasket – NOS in Original Stant Packaging** Keep your classic on the road with a genuine Stant 27174, the Stant thermostat gasket for Ford-family four-cylinders from 1978 to 1994 — the 140/2.3L, the 1.6L/1.9L, the 2.0L and the 2.5L — in Ford, Mercury, Merkur and the 1994 Mazda B2300. Stant's Stat Lok gaskets have an adhesive backing that holds the thermostat centered in its seat while you bolt the housing down — no gasket cement, no thermostat falling out, and less risk of misalignment or cracking the outlet flange. **Key Features** - Part Number: Stant 27174 (single pack); same gasket as Stant 25174 / B74 in the Stant catalog and cross-reference tables - Type: Engine coolant thermostat (housing/water outlet) gasket, Stat Lok adhesive-backed - Thermostat opening (mounting hole) diameter: 1.75 in. (per Gates/retailer data for the direct equivalent) - Condition: New Old Stock (NOS) in original Stant packaging - Cross-references: Gates 33645; ACDelco 12G28; Fel-Pro 35358, 35477; Ford OE E1FZ 8255 A, E1FZ 8255 B, E4PZ 8255 A, E5FZ 8255 A, E6FZ 8255 A, F0CZ 8255 A; Victor Reinz C26235, C26302; OE F6CZ8255AA, E5FZ8255A, F0CZ8255B, E4PZ8255A, E6FZ8255A, E1FZ8255B, F0CZ8255A, E1FZ8255A Stant's own 1928–1994 application catalog lists the 27174 for 4 makes from 1978 to 1994. It is ideal for restoration projects, weekend drivers and mechanics working on obsolete iron. **Compatible Makes & Models (from the Stant catalog)** - **Ford** (1979–1994): Aerostar (1986–1987), Bronco Compact (1985), Escort (1981–1994), EXP (1982–1988), Fairmont (1979–1983), Granada (1981–1982), LTD (1983–1986), Mustang (1979–1993), Pinto (1979–1980), Ranger (1983–1994), Taurus (1986–1991), Tempo (1984–1994), Thunderbird (1983–1988) - **Mazda** (1994): B2300 Pickup (1994) - **Mercury** (1978–1994): Bobcat (1978–1980), Capri (1978–1986), Cougar (1981–1982, 1984–1986), LN7 (1982–1983), Lynx (1981–1987), Marquis (1983–1986), Sable (1986), Topaz (1984–1994), Tracer (1991–1994), Zephyr (1978–1983) - **Merkur** (1985–1989): XR4Ti (1985–1989) **Note**: Always verify fitment for your specific year, make, model and engine. The full engine-by-engine list is in the fitment appendix below. If you have your old gasket, compare its shape, bolt holes and opening size — or just ask Don and Kathy. **Price is $9.95 plus 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 (misty@donsobsoleteautoparts.com), Don and Kathy connect directly with restorers and collectors while preserving their legacy of quality parts. These gaskets come from Don's own shelves, in original Stant packaging. To reach them, click the "Don & Kathy Leask" button at the bottom left of any page on donsobsoleteautoparts.com, or email misty@donsobsoleteautoparts.com. **The Stant 27174 Thermostat Gasket: The Right Seal for Ford and Mazda Restorations** Thermostat gaskets are small, but they decide whether a cooling system stays dry. When the thermostat housing comes off a project car or truck, the right gasket is the quiet part that keeps the job from turning into a second trip to the parts counter. The **Stant 27174** is the Stant thermostat gasket for Ford-family four-cylinders from 1978 to 1994 — the 140/2.3L, the 1.6L/1.9L, the 2.0L and the 2.5L — in Ford, Mercury, Merkur and the 1994 Mazda B2300. Like the rest of Stant's Stat Lok line, it has an adhesive backing that holds the thermostat in place during installation, so it seats squarely and seals the first time. **Why This Gasket Matters** Stant's application catalog covering 1928 through 1994 lists the 27174 across 4 makes (Ford, Mazda, Mercury, Merkur). Cross-reference tables tie it to the Stant 25174, Gates 33645 and Fel-Pro 35358, which makes it easy to match against an old parts list or a worn-out gasket. **Real-World Fitment Examples** - Ford Mustang 2.3L (1979–1993) - Ford Escort/EXP and Mercury Lynx/LN7 1.6L/1.9L - Ford Ranger 2.0L/2.3L (1983–1994); 1994 Mazda B2300 - Ford Fairmont, Granada, LTD, Thunderbird and Mercury Zephyr, Capri, Cougar, Marquis, Topaz 2.3L - Merkur XR4Ti (1985–1989); Ford Taurus/Mercury Sable 2.5L Because these were high-volume service items, NOS stock still turns up in collections like Don Leask's — in original Stant packaging, sorted by number. **Preserving American Automotive History** 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 AI-assisted 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. Some engines had more than one thermostat housing design. - Measure the thermostat opening: the 27174 is listed at about 1.75 in. - Prefer original packaging for authenticity; keep the Stant label with the part. - Restoration shops, clubs and collectors can ask about quantity pricing. Whether you're chasing a concours restoration or simply keeping a classic on the road, the Stant 27174 is a period-correct, ready-to-install solution. --- ## Fitment appendix — every Stant catalog line for 27174 Source: Stant *Thermostats, Gaskets, Caps – 1928 through 1994* (application pages). Format: Model — years [engine: years] (notes). Catalog coverage ends with 1994 models. **Ford** - Aerostar — 1986–1987 [4-Cyl. 2.3 L: 1986–1987] - Bronco Compact — 1985 [4-Cyl. 2.3 L Diesel: 1985] - Escort — 1981–1994 [4-Cyl. 1.6 L: 1981–1985; 4-Cyl. 1.9 L: 1985–1994] - EXP — 1982–1988 [4-Cyl. 1.6 L: 1982–1985; 4-Cyl. 1.9 L: 1986–1988] - Fairmont — 1979–1983 [4-Cyl. 140: 1979; 4-Cyl. 2.3 L: 1980–1983] - Granada — 1981–1982 [4-Cyl. 2.3 L: 1981–1982] - LTD — 1983–1986 [4-Cyl. 2.3 L: 1983–1986] - Mustang — 1979–1993 [4-Cyl. 140: 1979; 4-Cyl. 2.3 L: 1980–1993] - Pinto — 1979–1980 [4-Cyl. 140: 1979; 4-Cyl. 2.3 L: 1980] - Ranger — 1983–1994 [4-Cyl. 2.0 L: 1983–1988; 4-Cyl. 2.3 L: 1983–1994] - Taurus — 1986–1991 [4-Cyl. 2.5 L: 1986–1991] - Tempo — 1984–1994 [4-Cyl. 2.3 L: 1984–1994] - Thunderbird — 1983–1988 [4-Cyl. 2.3 L: 1983–1988] **Mazda** - B2300 Pickup — 1994 [4-Cyl. 2.3 L: 1994] **Mercury** - Bobcat — 1978–1980 [4-Cyl. 140: 1978–1979; 4-Cyl. 2.3 L: 1980] - Capri — 1978–1986 [4-Cyl. 140: 1978–1979; 4-Cyl. 2.3 L: 1980–1986] - Cougar — 1981–1982, 1984–1986 [4-Cyl. 2.3 L: 1981–1982, 1984–1986] - LN7 — 1982–1983 [4-Cyl. 1.6 L: 1982–1983] - Lynx — 1981–1987 [4-Cyl. 1.6 L: 1981–1985; 4-Cyl. 1.9 L: 1985–1987] - Marquis — 1983–1986 [4-Cyl. 2.3 L: 1983–1986] - Sable — 1986 [4-Cyl. 2.5 L: 1986] - Topaz — 1984–1994 [4-Cyl. 2.3 L: 1984–1994] - Tracer — 1991–1994 [4-Cyl. 1.9 L: 1991–1994] - Zephyr — 1978–1983 [4-Cyl. 140: 1978–1979; 4-Cyl. 2.3 L: 1980–1983] **Merkur** - XR4Ti — 1985–1989 [4-Cyl. 2.3 L: 1985–1989] ## Cross-references (full) - **Gates:** 33645 - **ACDelco:** 12G28 - **Fel-Pro:** 35358, 35477 - **Ford OE:** E1FZ 8255 A, E1FZ 8255 B, E4PZ 8255 A, E5FZ 8255 A, E6FZ 8255 A, F0CZ 8255 A, F0CZ 8255 B, F6CZ 8255 AA - **Victor Reinz:** C26235, C26302 - **OE numbers listed by AutoPartsPrime:** F6CZ8255AA, E5FZ8255A, F0CZ8255B, E4PZ8255A, E6FZ8255A, E1FZ8255B, F0CZ8255A, E1FZ8255A - **Stant equivalents:** 25174 (multi/bulk-pack number paired with 27174 in the catalog), B74 ## Sources 1. Stant *Thermostats, Gaskets, Caps – 1928 through 1994* catalog (scan on Internet Archive): https://archive.org/details/StantThermostatsGasketsCaps1928Through1994OCR637Pages — Stant part-number index ("Make / Year(s)" table, PDF p. 633–634) and application pages (PDF pages 428–524; 16 pages list 27174). Every catalog line pairs "Thermostat Gasket 25174" with "Thermostat Gasket (1 Pack) 27174". 2. AutoPartsPrime – STANT 27174 Engine Coolant Thermostat Gasket (type, UPC, OE numbers, fitment): https://www.autopartsprime.com/stant/engine-coolant-thermostat-gasket/mp-27174 3. PartsHawk – Gates 33645 (interchange lists Stant 27174; mounting hole diameter 1.75"; fitment): https://partshawk.com/gates-33645-engine-coolant-thermostat-housing-gasket.html 4. KaKaPart – Stant 27174 (type "Thermostat Gasket", hole diameter 1.75"; application table): http://www.kakapart.com/parts/stant-27174.html