Gates Engine Coolant Thermostat 33958
Gates Engine Coolant Thermostat 33958

Gates Engine Coolant Thermostat P/N:33958

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$43.99
MPN: 33958
UPC: 770075225935
Item Package Quantity: 1
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Gates Engine Coolant Thermostat P/N:33958
Gates Engine Coolant Thermostat P/N:33958
$43.99

Regulate engine warm-up and coolant flow with the Gates Engine Coolant Thermostat 33958, a direct-fit replacement for the listed applications, including the 2003-2005 Ford Excursion, the 2003-2007 Ford F-250, F-350, F-450 and F-550 Super Duty, the 2004-2010 Ford E-350 and E-450 Super Duty, and International models such as the 2002-2007 and 2009 International 4200. See the Buyer's Guide tab for the full list of applications.

The thermostat is a temperature-controlled valve in the engine's cooling circuit. It stays closed during a cold start so the engine reaches operating temperature quickly, then opens to route coolant to the radiator and hold the engine within its normal operating range.

  • Temperature-regulated valve: opens and closes with coolant temperature to help maintain a stable operating temperature.
  • Faster, cleaner warm-up: remains closed on cold start to help the engine warm up before circulating coolant to the radiator.
  • Signs it may need replacing: overheating, running colder than normal, a fluctuating temperature gauge, or weak cabin heat. Diagnose the cause first; if a stuck thermostat is the cause, this replaces it.

Interchange: 4899 · 30309 · 14899 · 3C3Z 8575 AA · 3C3Z8575AA · 85691 · 1839304C92 · 4038-92 · 403892 · 510-192 · 510192 · 436-192 · 436192
Manufacturer part number 33958

This part cross-references / interchanges with the following part numbers:

4899, 30309, 14899, 3C3Z 8575 AA, 85691, 1839304C92, 4038-92, 510-192, 436-192, 33958

Frequently Asked Questions

What does the Gates 33958 thermostat do?

It's a temperature-controlled valve that stays closed during warm-up, then opens to route coolant to the radiator, helping hold the engine at its normal operating temperature.

What vehicles does it fit?

Direct-fit for the listed applications, including the 2003-2005 Ford Excursion, 2003-2007 Ford F-250 through F-550 Super Duty, and 2002-2007 and 2009 International 4200. See the Buyer's Guide tab for the full list.

What numbers does it interchange with?

It cross-references 4899, 30309, 14899, 3C3Z 8575 AA, 85691, 1839304C92, 4038-92, 510-192 and 436-192.

How do I know if my thermostat is failing?

Common signs include overheating, running colder than normal, a fluctuating temperature gauge, or weak cabin heat. Diagnose the cause first; if a faulty thermostat is to blame, this replaces it.

Do I need anything else to install it?

Consult the vehicle service information for the correct gasket or seal, fasteners, and the coolant refill and bleed procedure before installing.

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