Allmotorparts Thermostat for Chrysler Dodge Jeep Ram Hemi 203℉ - Direct-Fit 5.7–6.4L with Gasket

Allmotorparts 203℉ replacement thermostat with gasket for Chrysler, Dodge, Jeep and Ram Hemi engines controls coolant flow to help the engine reach and hold correct operating temperature.

This aftermarket thermostat is designed as a direct-fit replacement for part number 52028898AE and fits many 5.7L, 6.1L, 6.2L and 6.4L Hemi applications across Chrysler, Dodge, Jeep and Ram model years listed below. It includes a gasket, stainless steel components, and an OE-style configuration intended to match original fit and function. Use the compatibility list in the description to confirm fit before ordering and note the jiggle-pin orientation requirement for vertical installations.

How will this thermostat affect engine temperature readings?

When installed correctly, a functioning thermostat opens at its rated temperature (203℉) to allow coolant flow to the radiator and closes when the engine cools. A proper thermostat reduces wide temperature swings and helps the cooling system maintain steady operating temperature.

• Opens at 203℉ to permit coolant circulation to the radiator.
• Closes when below setpoint to speed warm-up and prevent overcooling.
• OE-style spring and stainless frame for consistent response.

Which vehicles and engines are compatible with this part?

This thermostat replaces Chrysler part 52028898AE and is compatible with many Hemi V8 models in 5.7L–6.4L displacements across Chrysler, Dodge, Jeep and Ram lineups. Check vehicle year, model and engine before purchase to ensure accurate fitment.

• Chrysler: 2005–2023 300, 2007–2009 Aspen.
• Dodge: 2008–2023 Challenger, 2006–2023 Charger, Durango, Magnum, Ram 1500/2500/3500 models listed in description.
• Jeep & Ram: Grand Cherokee, Wagoneer, Commander, Wrangler and Ram 1500/2500/3500 series where 5.7L–6.4L Hemi applies.

What signs indicate the thermostat needs replacement?

A failing thermostat can cause overheating, underheating, erratic temperature gauge behavior or coolant leaks near the housing. If you observe temperature instability, coolant pooling beneath the engine, or the engine never reaching normal temperature, inspect the thermostat and housing for failure.

• High temperature gauge or engine overheating under load.
• Engine running cooler than normal or slow to warm up.
• Visible coolant seepage around the thermostat housing or under the vehicle.

Are there installation notes or orientation details I should know?

Yes. If your thermostat design includes a jiggle pin or check valve intended to bleed trapped air in vertical installations, that pin must face the 12 o'clock position. Follow vehicle-specific service procedures, replace the gasket included in the kit, and bleed the cooling system per manufacturer guidance.

• Install jiggle pin at the north/12 o'clock location for vertical housings.
• Use the supplied gasket and torque bolts to factory specs to avoid leaks.
• Bleed air from the cooling system after installation to prevent hotspots.

Who is this for: This Allmotorparts 203℉ thermostat is for owners, mechanics and DIY technicians maintaining Chrysler, Dodge, Jeep or Ram vehicles equipped with 5.7L–6.4L Hemi engines who need a reliable aftermarket replacement for part 52028898AE. It’s suitable for routine replacement when diagnosing temperature control issues or during cooling-system maintenance; verify your vehicle’s year, model and engine against the compatibility list before purchasing. Note: this is an aftermarket component, not an OEM part.