Gates Engine Coolant Thermostat P/N:34935
Gates 33509 cooling system components for the 1993-2003 Jeep Grand Cherokee 4.0L and other vehicles is an economy engine coolant thermostat that holds engine temperature steady by opening at a set point.
Signs of a failing part can include an engine that runs hotter than normal, a temperature gauge that sits high, or an engine that is slow to warm up. Low coolant or a leak can look the same, so with the engine cool, check the coolant level and look over the hoses and housing before you replace the part.
It is a direct-fit replacement for the 1994-2002 Dodge Ram 1500 5.9L and the 1987-1995 Jeep Wrangler 2.5L, among other vehicles.
Fit and size
Build and materials
This listing holds one part, and a vehicle takes one. An installation tool is included; no gasket or seal comes with it.
Does the Gates 33509 fit a 1993-2003 Jeep Grand Cherokee 4.0L?
Yes. Gates 33509 fits the 1993-2003 Jeep Grand Cherokee 4.0L, the 1994-2002 Dodge Ram 1500 5.9L and the 1987-1995 Jeep Wrangler 2.5L. For any other car, look it up in the "Vehicles it fits" section.
Does the Gates 33509 come with a gasket or seal?
No. This listing has no gasket or seal. It holds one part and an installation tool.
What temperature does the Gates 33509 thermostat start to open at?
Gates 33509 starts to open at 195°F (91°C). It has a reverse poppet design and no jiggle pin weep hole.
How can I tell if my engine's coolant thermostat is going bad?
Signs can include an engine running hotter than normal, a temperature gauge that sits high, or slow warm-up. A shop can test the part if you are unsure.
What spring and element does this Gates economy thermostat use?
It has a factory-calibrated spring for smooth thermal valve operation. A factory-calibrated wax element regulates the opening temperature.
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WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.