HomeBelts and Cooling > Thermostat and HousingGates CO34904 Engine Coolant Thermostat Housing Cover
Part #: CO34904

Gates CO34904 Engine Coolant Thermostat Housing Cover

Coolant Outlet
⚙️ 50 vehicles fit this part
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Select your vehicle to confirm fitment
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✅ In Stock · Ready To Ship Most orders ship same-day if ordered before 1pm CST.
OE Direct Replacement — Bolt-on fit, no modifications needed
📦Coolant Outlet
🚗Fitment: INFINITI and Nissan, 200SX, 300ZX, D21, Frontier, M30, Pathfinder, Pickup, QX4, and Xterra
🔄Easy Returns — Return within 60 days for a full refund
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Overview of Gates Coolant Outlet CO34904

The Gates Coolant Outlet CO34904 is a stamped steel engine coolant thermostat housing cover designed for select Nissan and INFINITI vehicles. Engineered to meet OE exact specifications, this thermostat cover ensures reliable coolant flow and system integrity for models like the Nissan 300ZX and INFINITI QX4.

  • Constructed from durable stamped steel for long-lasting performance
  • OE exact fit for precise compatibility
  • Features three bolt holes for secure mounting
  • Outlet inside diameter of 1.48 inches and outside diameter of 1.625 inches
  • Includes one seal but no gaskets
  • Designed without by-pass holes to match original equipment

About the Gates Coolant Outlet Product Line

The Gates Coolant Outlet line focuses on high-quality thermostat covers and coolant outlets that maintain proper engine temperature regulation. This product line is engineered to provide exact fitment and reliable sealing, helping to prevent coolant leaks and maintain optimal engine cooling performance. The CO34904 is part of this line, offering a stamped steel construction that aligns with the durability and precision expected from Gates components.

Detailed Product Description

The CO34904 thermostat housing cover is manufactured from stamped steel, providing strength and resistance to corrosion under typical engine operating conditions. It features three bolt holes for secure attachment and an outlet designed with an inside diameter of 1.48 inches and an outside diameter of 1.625 inches, ensuring proper coolant flow. This thermostat cover does not include by-pass holes, matching the original equipment design for vehicles such as the Nissan Pathfinder and Frontier. The product includes one seal to maintain a tight connection but does not come with additional gaskets.

Compatible Vehicles and Common Applications

  • Compatible with Nissan 200SX, 300ZX, D21, Frontier, Pathfinder, Pickup, and Xterra models
  • Fits INFINITI M30 and QX4 vehicles
  • Used to replace worn or damaged thermostat housing covers
  • Helps resolve coolant leaks around the thermostat housing
  • Addresses issues related to improper coolant flow or overheating

Installation Notes and Tips

When installing the Gates CO34904 thermostat housing cover, ensure the mating surfaces are clean and free of old gasket material. Since this part includes one seal but no gaskets, verify if your vehicle requires a separate gasket for installation. Tighten the three mounting bolts evenly to the manufacturer’s torque specifications to prevent leaks. Inspect the coolant outlet diameter to confirm compatibility with your vehicle’s cooling system hoses.

Quality Assurance and Warranty

The Gates CO34904 thermostat housing cover is manufactured to meet OE exact standards, ensuring reliable fit and function. Gates is known for rigorous quality control processes, providing durable components designed for long-term use. While specific warranty details are not provided here, Gates products typically come with a limited warranty against defects in material and workmanship.

BrandGates
Part NumberCO34904
PositionCoolant Outlet
MaterialStamped steel
Outlet Outside Diameter1.625
Bolt Hole Quantity3
TypeThermostat cover
Gasket Quantity0
Outlet Inside Diameter1.48
98411
9848No
By-Pass HolesNo
ContentsCoolant outlet, gasket
Number of Bolt Holes3
Number of Gaskets0
Number of Seals1
OE ExactYes
Outlet Inside Diameter 1 (in)1.48
Outlet Outside Diameter 1 (in)1.625
TypeCoolant outlet

This part fits 50 vehicles. Search below:

YearMakeModelLitersCylindersFuel TypePositionNotes
2004NissanFrontier3.3LV6GASN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
2004NissanXterra3.3LV6GASN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
2003NissanFrontier3.3LV6GASN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
2003NissanXterra3.3LV6GASN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
2002NissanFrontier3.3LV6GASN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
2002NissanXterra3.3LV6GASN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
2001NissanFrontier3.3LV6GASN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
2001NissanXterra3.3LV6GASN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
2000INFINITIQX43.3LV6GASN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
2000NissanFrontier3.3LV6GASN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
2000NissanPathfinder3.3LV6GASN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
2000NissanXterra3.3LV6GASN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
1999INFINITIQX43.3LV6GASN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
1999NissanFrontier3.3LV6GASN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
1999NissanPathfinder3.3LV6GASN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
1998INFINITIQX43.3LV6GASN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
1998NissanPathfinder3.3LV6GASN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
1997INFINITIQX43.3LV6GASN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
1997NissanPathfinder3.3LV6GASN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
1996NissanPathfinder3.3LV6GASN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
1995NissanPathfinder3.0LV6GASN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
1995NissanPickup3.0LV6GASN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
1994NissanD213.0LV6GASN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
1994NissanPathfinder3.0LV6GASN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
1993NissanD213.0LV6GASN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
1993NissanPathfinder3.0LV6GASN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
1992INFINITIM303.0LV6GASN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
1992NissanD213.0LV6GASN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
1992NissanPathfinder3.0LV6GASN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
1991INFINITIM303.0LV6GASN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
1991NissanD213.0LV6GASN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
1991NissanPathfinder3.0LV6GASN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
1990INFINITIM303.0LV6GASN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
1990NissanD213.0LV6GASN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
1990NissanPathfinder3.0LV6GASN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
1989Nissan300ZX3.0LV6GASN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
1989NissanD213.0LV6GASN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
1989NissanPathfinder3.0LV6GASN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
1988Nissan200SX3.0LV6GASN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
1988Nissan300ZX3.0LV6GASN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
1988NissanD213.0LV6GASN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
1988NissanPathfinder3.0LV6GASN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
1987Nissan200SX3.0LV6GASN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
1987Nissan300ZX3.0LV6GASN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
1987NissanD213.0LV6GASN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
1987NissanPathfinder3.0LV6GASN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
1986Nissan300ZX3.0LV6GASN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
1986NissanD213.0LV6GASN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
1985Nissan300ZX3.0LV6GASN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
1984Nissan300ZX3.0LV6GASN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

1304942L00130494S10013049V500085231902-5009CH5231

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.