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Reische 170° Performance Thermostat Application Guide
Thermostats may be cross referenced by engine type or Motorcraft model number.

ENGINE TYPE CROSS REFERENCE

Ford Duratec V6 engines (including Lincoln, Mercury and Mazda)
1995-2001 2.5L DOHC (24V) FORD-4D
2015-2023 2.7L EcoBoost FORD-50
1996-2012 3.0L DOHC (24V) FORD-4D
2017-2023 3.0L EcoBoost FORD-50
2018-2023 3.3L DOHC FORD-50
2007-2019 3.5L DOHC/EcoBoost (transverse* eng.) FORD-4D
2011-2023 3.5L DOHC/EcoBoost (RWD/4WD only) FORD-50
2009-2020 3.7L DOHC (transverse* eng.) FORD-4D * transverse mounted engine typically
2011-2017 3.7L DOHC (Mustang/F150 only) FORD-50 refers to front wheel drive or AWD vehicles
Ford/Lincoln/Mercury V8/V10
1993-2005 4.6L DOHC (32V) FORD-4D
2005-2006 4.6L SOHC-3V (Mustang GT only) FORD-4D
2011-2023 5.0L DOHC FORD-50
2015-2020 5.2L DOHC (Shelby GT350 only) FORD-50

Reische thermostats are not necessarily compatible with the above engines in every vehicle however, if your Ford vehicle’s Motorcraft thermostat (RT #) cross-references to any of the numbers below, then the corresponding Reische unit is guaranteed to fit your application. (Motorcraft notes and temp ratings are for informational purposes only)

MOTORCRAFT THERMOSTAT CROSS REFERENCE
Motorcraft

RT-1208

RT-1213

RT-1217

RT-1225

RT-1226

RT-1227

RT-1238

RT-1250

RT-1251

RT-1252

RT-1255

RT-1258
Notes

Superseded by RT-1225

Mustang/F150 3.0/3.3/3.5/3.7L - 188°

Superseded by RT-1227

EB3.0L, Mustang 5.0/5.2L - 180°

2.0/2.5L Hybrid - 180°

EB2.7/3.0L, F150 5.0L - 190°

2017-20 F150 EB3.5L - 195°

New OEM 2021+ F150 EB3.5L - 195°

New OEM EB2.7/3.0L, F150 5.0L - 190°

New OEM 2017-20 F150 EB3.5L - 195°

New OEM 3.3/3.5/3.7 - 188°

New OEM EB3.0L, Mustang 5.0/5.2L - 180°
Reische 170°

FORD-50
Motorcraft

RT-1085

RT-1104

RT-1110

RT-1131

RT-1168

RT-1172

RT-1175

RT-1228

RT-1253*
Notes

Early 188°

Early 180°

190°

V6 - 190°

03-04 Cobra - 180°

Superseded by RT-1228

Updated V6 - 190°

Updated V6 - 180°

New OEM V6 - 180°
Reische 170°

FORD-4D

* The Motorcraft RT-1253 may require modifications to fit the older remote-style thermostat housings.

If you have any questions about compatibility with your vehicle please feel free to Contact Us.
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