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Automotive replacement thermostat housing caps: top picks

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Automotive replacement thermostat housing caps: top picks

AI-generated summary · updated September 7, 2026 · verify details before purchase.

  1. Dorman 902-021 Engine Coolant Thermostat Housing Cap
    Best overall Dorman

    Dorman 902-021 Engine Coolant Thermostat Housing Cap

    4.5/5 $12.45

    Direct fit replacement for many GM models, includes seal and clips. High quality at a low price.

    • Affordable
    • Easy installation
    • Durable construction
    • Fits only certain GM models
    View on Amazon manufacturer site
  2. Gates 33008 Engine Coolant Thermostat Housing
    Best value Gates

    Gates 33008 Engine Coolant Thermostat Housing

    4.6/5 $13.71

    OE-quality replacement with precision fit. Compatible with many Ford and Mazda vehicles.

    • OE quality
    • Precision fit
    • Includes gasket
    • Limited vehicle compatibility
    View on Amazon manufacturer site
  3. ACDelco 15285786 GM Original Equipment Engine Coolant Thermostat Housing
    Best OEM ACDelco

    ACDelco 15285786 GM Original Equipment Engine Coolant Thermostat Housing

    4.7/5 $36.88

    Genuine GM part for exact fit and reliability. Ideal for Chevy and GMC trucks.

    • OEM quality
    • Perfect fit
    • Long lifespan
    • Higher price than aftermarket
    View on Amazon manufacturer site
  4. Dorman 902-018 Engine Coolant Thermostat Housing Cap
    Best budget pick Dorman

    Dorman 902-018 Engine Coolant Thermostat Housing Cap

    4.4/5 $8.78

    Low-cost solution for Chrysler/Dodge/Jeep vehicles. Replaces original plastic cap with durable material.

    • Very affordable
    • Easy to replace
    • Works well
    • Plastic may crack over time
    View on Amazon manufacturer site
  5. Stant 10238 Thermostat Housing Cap
    Best universal cap Stant

    Stant 10238 Thermostat Housing Cap

    4.3/5 $7.50

    Versatile cap for various engines. Brass insert ensures leak-free seal.

    • Universal fit
    • Leak-proof seal
    • Low cost
    • May not fit all models
    View on Amazon manufacturer site
  6. Four Seasons 84810 Engine Coolant Thermostat Housing
    Best for Ford Four Seasons

    Four Seasons 84810 Engine Coolant Thermostat Housing

    4.5/5 $18.95 Only 6 left

    Direct fit for Ford F-150 and Expedition. Includes gasket and o-rings for complete installation.

    • Complete kit
    • Good build quality
    • Easy installation
    • Slightly higher price
    View on Amazon manufacturer site

Buying tips

When choosing a thermostat housing cap, ensure it matches your vehicle's make, model, and engine. Pay attention to material (plastic vs. metal) and whether it includes necessary seals. OEM parts offer guaranteed fit but at a premium; aftermarket options like Dorman and Gates provide excellent value. Always check customer reviews for fitment issues.

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