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  3. GATES SX-1242

GATES SX-1242 Engine Coolant Thermostat PM151 5.2L 5.5L 5.7L V8

fits model: Sl. make: Gmc. year: 1956–1959.

Sx-1242 Gates Engine Coolant Thermostat For 1956-1959 Gmc Pm151 5.2l 5.5l 5.7l V8 Sl

( Brand: Gates ), ( Manufacturer Part Number: SX-1242 ), ( Type: Engine Coolant Thermostat ), ( Placement On Vehicle: Belts Cooling Thermostat Housing ), ( Manufacturer Warranty: Recommended Service Interval ), ( Item Height: 2.750 ), ( Ipn: C363 9-35 ), ( Compatible Model: Pm151 ), ( Compatible Year: 1959 1958 1957 1956 ), ( Core Charge: Free No Core Charge ), ( Fitment Type: Direct Replacement ), ( Bundle Description: 1 Pc Genuine Gates Engine Coolant Thermostat )

Review GATES Engine Coolant Thermostat For Gmc 5.2l 5.5l 5.7l V8 fits SL 1956–1959

Introducing the Gates SX-1242 Engine Coolant Thermostat, specifically designed for the 1956-1959 GMC models with the PM151 5.2L, 5.5L, and 5.7L V8 SL engines. This thermostat is an essential component of your engine cooling system, regulating the temperature of the coolant to ensure optimal engine performance and longevity.

The Gates SX-1242 is manufactured using advanced engineering techniques and high-quality materials to deliver superior durability and reliability. Its housing is made of robust cast aluminum, which effectively dissipates heat and provides excellent resistance to corrosion and wear. The thermostat valve is constructed from brass, ensuring consistent sealing and reliable operation even after prolonged use.

This thermostat maintains a balanced engine temperature by opening and closing based on the coolant temperature. When the engine is cold, the thermostat remains closed, allowing the coolant to circulate slowly through the engine to promote even heating. Once the engine reaches its optimal operating temperature, the thermostat opens, allowing the coolant to flow freely to the radiator, helping to dissipate excess heat.

The Gates SX-1242 Engine Coolant Thermostat offers an ideal balance between performance and fuel efficiency. By ensuring that the engine operates at its optimal temperature, it helps improve combustion efficiency and reduces fuel consumption. Additionally, it protects the engine from overheating, which can lead to costly repairs and potential engine damage.

Installation of the Gates SX-1242 Engine Coolant Thermostat is straightforward, making it a convenient and hassle-free upgrade for your GMC vehicle. Its design closely matches the original equipment, ensuring a perfect fit and easy integration with your existing cooling system.

In summary, the Gates SX-1242 Engine Coolant Thermostat is an essential upgrade for your 1956-1959 GMC PM151 V8 SL models, offering superior durability, reliability, and performance. This thermostat is engineered to maintain optimal engine temperature for improved fuel efficiency, consistent performance, and long-lasting engine protection.

The Gates SX-1242 engine coolant thermostat is a potential replacement option for the cooling system of 1956-1959 GMC trucks with the PM151 5.2L, 5.5L, and 5.7L V8 SL engines. Here are some pros and cons that might help in deciding whether to purchase this thermostat:

Pros:

1. Reputation: Gates is a well-known and reputable brand in the automotive industry, known for manufacturing high-quality cooling system components.

2. Fitment: This thermostat is specifically designed to fit the mentioned GMC engine models, ensuring a proper fit.

3. Durability: The Gates SX-1242 thermostat is engineered to withstand the rigors of heavy-duty use, making it a reliable choice for those who use their trucks extensively.

4. Temperature Control: The thermostat ensures efficient engine temperature control, preventing the engine from overheating and ensuring optimal performance.

5. Availability: This thermostat is widely available from various automotive parts stores and online retailers, making it easily accessible.

Cons:

1. Price: Compared to some aftermarket options, the Gates SX-1242 thermostat might be pricier.

2. Installation: Installing a thermostat can be a challenging task, especially for those who are not mechanically inclined. It might be necessary to seek professional assistance.

3. OEM vs. Aftermarket: Some people might prefer the Original Equipment Manufacturer (OEM) thermostat, as it is the one that came with their truck originally. However, aftermarket options like the Gates SX-1242 might offer better performance or durability.

In conclusion, the Gates SX-1242 engine coolant thermostat is a reliable and durable option for those in need of a replacement for their 1956-1959 GMC trucks' cooling system. Its reputation, fitment, and temperature control make it a worthwhile investment, despite its price and potential installation challenges. If you're looking for a high-quality, reliable thermostat for your GMC truck, the Gates SX-1242 is a solid choice.

Details:

Gates Engine Coolant Thermostat for 1956-1959 GMC PM151 5.2L 5.5L 5.7L V8 Sl: Status: In Stock.

part #: sx1242 prices

  • $14.51-$22.60

specifications radiatoranch:

  • for models: Sl
  • for makes: Gmc
  • for years: 1956-1959
  • brand: Gates
  • mpn: Sx-1242
  • type: Engine Coolant Thermostat
  • placement on vehicle: Belts Cooling Thermostat Housing
  • manufacturer warranty: Recommended Service Interval
  • item height: 2.750
  • ipn: C363 9-35
  • compatible model: Pm151
  • compatible year: 1959 1958 1957 1956
  • core charge: Free No Core Charge
  • fitment type: Direct Replacement
  • bundle description: 1 Pc Genuine Gates Engine Coolant Thermostat

seller radiatoranch:

  • # reviews: 576476
  • rating: 98.9%
  • city: Indianapolis, Indiana

general radiatoranch:

  • Car Truck Parts Accessories > Engine Cooling Components > Radiators
  • condition: New

returns radiatoranch:

  • policy: Returns Accepted
  • paid by: Seller
  • time: 30 Days

shipping radiatoranch:

  • service: Standard, Expedited
  • transit: 3-6 Days
  • cost: $0.00
  • class: Standard, Expedited
  • type: Fixed

offer radiatoranch:

  • availability: In Stock
  • quantity: 10
  • options: Ship-to-home
  • sold: 0
  • started: October 4, 2025

payments radiatoranch:

  • credit card: Mastercard
  • wallet: Paypal
  • other
for models: sl, for makes: gmc, for years: 1956-1959, type: engine coolant thermostat, placement on vehicle: belts cooling thermostat housing, manufacturer warranty: recommended service interval, item height: 2.750, compatible model: pm151, compatible year: 1959 1958 1957 1956, core charge: free no core charge, fitment type: direct replacement, bundle description: 1 pc genuine gates engine coolant thermostat,
category: auto parts > car truck parts accessories > engine cooling components > radiators, sku: 9444665237135603,

Gates SX-1242 Is Similar To:

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5 offers $14.51–$22.60 USD
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