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Stant 27140 Thermostat Gasket (Stat Lok, NOS) – Fitment Guide for AM General, American Motors, Buick, Chevrolet, Chrysler, DeSoto and more (1933–1994)

Fitment Guide for AM General, American Motors, Buick, Chevrolet, Chrysler, DeSoto and more (1933–1994)

Stant 27140 Stat Lok Engine Coolant Thermostat Gasket – NOS in Original Stant Packaging

Keep your classic on the road with a genuine Stant 27140, the Stant thermostat gasket for Chrysler-family V8s (and some early sixes) from the 1940s through 1978, Ford/Edsel/Lincoln/Mercury big-block V8s from 1958 to 1967, Pontiac from 1933 to 1967, GM's 6.2L and 6.5L diesel V8s from 1982 to 1994, and 1958–1966 Rambler/AMC (two required on those). 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

Stant's own 1928–1994 application catalog lists the 27140 for 17 makes from 1933 to 1994. It is ideal for restoration projects, weekend drivers and mechanics working on obsolete iron.

Compatible Makes & Models (from the Stant catalog)

×2 = two gaskets required per vehicle on that application (per the Stant catalog).

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 ([email protected]), 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 [email protected].

The Stant 27140 Thermostat Gasket: The Right Seal for AM General and American Motors 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 27140 is the Stant thermostat gasket for Chrysler-family V8s (and some early sixes) from the 1940s through 1978, Ford/Edsel/Lincoln/Mercury big-block V8s from 1958 to 1967, Pontiac from 1933 to 1967, GM's 6.2L and 6.5L diesel V8s from 1982 to 1994, and 1958–1966 Rambler/AMC (two required on those). 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 27140 across 17 makes (AM General, American Motors, Buick, Chevrolet, Chrysler, DeSoto, Dodge, Edsel, Ford, GMC, Hudson, Jeep, Lincoln, Mercury, Plymouth, Pontiac, Rambler). Cross-reference tables tie it to the Stant 25140, Gates 33625 and Fel-Pro 11430, which makes it easy to match against an old parts list or a worn-out gasket.

Real-World Fitment Examples

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

Whether you're chasing a concours restoration or simply keeping a classic on the road, the Stant 27140 is a period-correct, ready-to-install solution.


Fitment appendix — every Stant catalog line for

27140

Source: Stant Thermostats, Gaskets, Caps – 1928 through 1994 (application pages). Format: Model — years [engine: years] (notes). Catalog coverage ends with 1994 models.

AM General

American Motors

Buick

Chevrolet

Chrysler

DeSoto

Dodge

Edsel

Ford

GMC

Hudson

Jeep

Lincoln

Mercury

Plymouth

Pontiac

Rambler

Cross-references (full)

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 304–603; 102 pages list 27140). Every catalog line pairs "Thermostat Gasket 25140" with "Thermostat Gasket (1 Pack) 27140".
  2. AutoPartsPrime – STANT 27140 Engine Coolant Thermostat Gasket (type, UPC, OE numbers, fitment): https://www.autopartsprime.com/stant/engine-coolant-thermostat-gasket/mp-27140
  3. PartsHawk – Gates 33625 (interchange lists Stant 27140; mounting hole diameter 2.25"; fitment): https://partshawk.com/gates-33625-engine-coolant-thermostat-housing-gasket.html
  4. KaKaPart – Stant 27140 (type "Thermostat Gasket", hole diameter 2.25"; application table): http://www.kakapart.com/parts/stant-27140.html
  5. CARiD – Stant 27140: https://www.carid.com/stant/engine-coolant-thermostat-gasket-mpn-27140.html
  6. FRsport – Stant 27140 application list: https://frsport.com/products/stant-engine-coolant-thermostat-gasket-27141

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