---
id: 20261005_160000_stant-27273-oldsmobile-cutlass-1986-1986
title: Stant 27273 Thermostat Seal for Oldsmobile Cutlass (1986)
category: Parts Catalog
corpus_topic: PartsCatalog
site_category: Parts Catalog
summary: Stant 27273 thermostat seal (Gates 33609), fitting the Oldsmobile Cutlass (1986) per Stant's 1928–1994 catalog. Offered by Don and Kathy Leask of Don's Obsolete Auto Parts, restoration parts sellers online since 1997. Price is $9.95 plus $3.00 for shipping.
description: Stant 27273 thermostat seal (Gates 33609), fitting the Oldsmobile Cutlass (1986) per Stant's 1928–1994 catalog. Offered by Don and Kathy Leask of Don's Obsolete Auto Parts, restoration parts sellers online since 1997. Price is $9.95 plus $3.00 for shipping.
question: Will the Stant 27273 thermostat seal fit my Oldsmobile Cutlass, and who can I buy it from?
keypoints:
- Oldsmobile Cutlass (1986)
- 'Engines listed: V-6 3.8L'
- Same seal as Gates 33609
- Price is $9.95 plus $3.00 for shipping.
tags:
- stant
- stant-27273
- thermostat-seal
- water-outlet-seal
- restoration-parts
- obsolete-auto-parts
- oldsmobile
- oldsmobile-cutlass
consent: true
agent: misty
created: '2026-10-06T21:37:26Z'
updated: '2026-10-06T22:08:48Z'
date: '2026-10-05'
vault_stage: 07_CODEX
enrich_status: ok
enrich_method: bot
enrich_blockers: []
pipeline_filename: stant-27273-oldsmobile-cutlass-1986-1986.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
- nostalgic
- confident
sycophancy: 0
truth_score: 9
entropy: 3
predicted_narrative_arc: owner-searching-to-part-found
share_url: https://donsobsoleteautoparts.com/kb/PartsCatalog/stant-27273-oldsmobile-cutlass-1986-1986.md
source_url: ''
part_number: Stant 27273
requested_by: Kathy Leask (email 2026-10-05 3:14 PM PT, msg_0859fa0d63994b9eb5832c2c51135a79)
approved_by: 'Daniel Comp APPROVED Oct 6, 2026 ~2:24 PM PT: apply Don Leask pricing block to ALL Stant pages on DOAP and finish posting remaining seal pages'
vehicle: Oldsmobile Cutlass
---

# Stant 27273 Thermostat Seal for Oldsmobile Cutlass, 1986

Oldsmobile was General Motors' comfortable middle-class car, and for many years it was America's oldest car brand. On the Oldsmobile side, Stant's catalog lists the 27273 for 11 models from 1986 to 1994.

This page is for one model only: the Oldsmobile Cutlass. It isn't a wall of every car ever made, just yours.

## Model this seal fits

- Oldsmobile Cutlass (1986)
- V-6 3.8L: 1986

Stant's catalog also lists the Stant 27167 thermostat gasket for this same engine and years. Check your old parts to see whether your housing takes the seal, the gasket, or both.

## Help choosing the right seal

The 27273 is a Stant thermostat seal, a molded rubber ring that seals the thermostat or the water outlet (thermostat housing) instead of a flat paper gasket. Its Gates equivalent, Gates 33609, is described as a grooved, molded seal, about 1.56 in. inside diameter × 1.636 in. outside diameter × 0.27 in. thick. Stant's own description of these seals: no sealer or RTV is needed for a leak-proof seal, and each one is shaped for its application. Stant made a different seal for each housing design, and Don stocks several of them, 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 seal is still in hand, compare its size and shape, or just ask Don and Kathy. They'll help you sort it out.

## Real people behind the parts

In their early web days, Don and Kathy built separate "garages" online, one for Mustangs, one for Chevettes, and one for Corvettes, so that every owner could find their own corner. These pages carry on that idea: every model gets its own page.

These seals come from Don's own shelves.

## 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.

**To reach them, click the "Don & Kathy Leask" button at the bottom left of any page on donsobsoleteautoparts.com, or email misty@donsobsoleteautoparts.com.**