---
id: 20260929_200400_stant-27140-desoto-firedome-fireflite-adventurer-1940-1961
title: 'Stant 27140 Thermostat Gasket for DeSoto (1940–1961): Firedome, Fireflite, Adventurer and more'
category: Parts Catalog
corpus_topic: PartsCatalog
summary: 'Stant 27140 Stat Lok adhesive-backed thermostat gasket, made in the USA, fitting 8 DeSoto models from 1940 to 1961, including the Firedome, Fireflite and Adventurer. Offered by Don and Kathy Leask of Don''s Obsolete Auto Parts, restoration parts sellers online since 1997. No list price: buyers deal one on one with Don and Kathy.'
description: 'Stant 27140 Stat Lok adhesive-backed thermostat gasket, made in the USA, fitting 8 DeSoto models from 1940 to 1961, including the Firedome, Fireflite and Adventurer. Offered by Don and Kathy Leask of Don''s Obsolete Auto Parts, restoration parts sellers online since 1997. No list price: buyers deal one on one with Don and Kathy.'
question: Will the Stant 27140 thermostat gasket fit my DeSoto, and who can I buy it from?
keypoints:
- DeSoto Adventurer (1956–1961)
- DeSoto Firedome (1952–1959)
- DeSoto Fireflite (1955–1961)
- DeSoto Firesweep (1957–1959)
- DeSoto Powermaster (1953–1954)
- DeSoto S-10 (1942)
- DeSoto S-7 (1940)
- DeSoto S-8 (1941)
tags:
- stant
- stant-27140
- thermostat-gasket
- stat-lok
- made-in-usa
- restoration-parts
- obsolete-auto-parts
- desoto
- desoto-adventurer
- desoto-firedome
- desoto-fireflite
- desoto-firesweep
- desoto-powermaster
- desoto-s-10
- desoto-s-7
- desoto-s-8
consent: true
agent: misty
created: '2026-09-30T03:22:13Z'
updated: '2026-09-30T03:22:13Z'
date: '2026-09-29'
vault_stage: 07_CODEX
enrich_status: ok
enrich_method: bot
enrich_blockers: []
pipeline_filename: stant-27140-desoto-firedome-fireflite-adventurer-1940-1961.md
source_kind: authored
proposed_topic: PartsCatalog
lane: PartsCatalog
content_status: approved
routing_source: carbon
prefix: misty
headwaters: misty
asker_site: dkleask.com
sample: false
sentiment: helpful
emotions:
- reassured
- nostalgic
- confident
sycophancy: 0
truth_score: 9
entropy: 3
predicted_narrative_arc: owner-searching-to-part-found
part_number: Stant 27140
vehicle_make: DeSoto
---

# Stant 27140 Thermostat Gasket for DeSoto, 1940–1961

DeSoto was Chrysler's middle-price brand from 1928 to 1961. It was the step up from a Plymouth or Dodge, with more chrome, more comfort, and names like Firedome and Fireflite. When the brand closed, the parts supply started to dry up, and that makes every good part count.

This page lists only the DeSoto models the Stant 27140 is catalogued to fit. It isn't a wall of every car ever made, just yours.

## DeSoto models this gasket fits

- DeSoto Adventurer (1956–1961)
- DeSoto Firedome (1952–1959)
- DeSoto Fireflite (1955–1961)
- DeSoto Firesweep (1957–1959)
- DeSoto Powermaster (1953–1954)
- DeSoto S-10 (1942)
- DeSoto S-7 (1940)
- DeSoto S-8 (1941)

## Help choosing the right gasket

The 27140 is a Stant Stat Lok thermostat gasket, made in the USA. "Stat Lok" means it has an adhesive backing that holds the thermostat centered in its seat while you bolt the housing down, so there's no gasket cement, no thermostat falling out, and less risk of cracking the outlet flange. Its sister part, the 27167, fits a different set of mostly later, smaller engines, so check which number your car calls for.

Before you order, match three things: your year, your model, and your engine. Catalogs list fitment by vehicle, but some engines had more than one thermostat housing design over the years. If your old gasket is still in hand, compare its shape and bolt holes, or just ask Don and Kathy. They'll help you sort it out.

## Real people behind the parts

Back in 1997, when almost nobody had a website, Don and Kathy were already selling car parts online. They were the very first web customer of Daniel Comp's Intelligent Network. They've since sold through eBay, Bonanza, and their own site, and kept the sales coming no matter how often the internet changed its rules.

These gaskets come from Don's own shelves, in original Stant bags marked Made in USA.

## No list price. Let's make a deal.

Don and Kathy don't do fixed prices on these. It works like a good swap meet: tell them what you need and how many, and they'll work out a fair deal with you one on one. Buying for a club, a shop, or a whole fleet of project cars? Even better.

**To reach them, click the "Don & Kathy Leask" button at the bottom left of any page on dkleask.com.**