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Engine Block Heater for Jeep Cherokee (1987-2001) 4.0L



Precio regular $64.95
Precio de oferta $64.95 Precio regular
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Cold-Weather Freeze Plug Engine Block Heater for 1987-2001 Jeep Cherokee (XJ)

What it Does: The Zerostart Engine Block Heater warms engine coolant directly inside the block of the 1987-2001 Jeep Cherokee to eliminate dry cold-starts, reduce starter draw, and deliver rapid cabin heat in sub-zero environments.

The Stock Jeep Cherokee Cold-Start Vulnerability

The cast-iron AMC 242 4.0L inline-six possesses substantial thermal mass. During sub-zero winter temperatures, thick 10W-30 engine oil resists rapid hydraulic flow to critical top-end components, including the flat-tappet camshaft, lifters, and pushrods. This cold-start boundary friction compounds starter motor load, drains factory battery reserve, and keeps the engine in rich, inefficient open-loop fueling far longer than necessary, accelerating internal cylinder bore wear.

The Engineering Solution

Engineered by Zerostart/Temro under part number 3100072, this 600-watt, 120-volt immersion heater integrates straight into the cooling jacket via a standard 2-inch freeze (core) plug port. By submerging the heating element directly into engine coolant, natural convection circulates heated fluid through the entire cast-iron cylinder block and cylinder head. The package includes a weather-sealed, detachable power cord, providing consistent heat soak down to -40°F to guarantee instant turnover and lower cold-start tailpipe emissions.

Technical Specifications

Fitment 1987-2001 Jeep Cherokee
Engine / Chassis AMC 242 4.0L I6 / XJ
Stock Output 177-190 hp / 220-225 lb-ft
Replaces OEM Part # Zerostart 3100072 (2-Inch Core Plug)

Compatibility

  • 1987-2001 Jeep Cherokee (XJ) with 4.0L Inline 6-Cylinder Gas Engine
  • Note: Does not fit 2.5L 4-cylinder, 2.8L V6, or diesel variants.

Frequently Asked Questions

Does this fit the XJ Cherokee?

Yes, this is a direct fit for the 1987-2001 Jeep Cherokee equipped with the AMC 242 4.0L engine.

Which engine port is used for installation?

It presses directly into a 2-inch engine block freeze plug port; drain coolant completely before driving out the factory core plug and installing the unit.

The Jeep Durability Standard

Engineered for brutal winter duty cycles and extreme overland cold, pre-heating your iron 4.0L preserves oil film strength, protects valvetrain metallurgy, and ensures your trail rig fires on the first turn of the key.




Mueble

Hacer

Jeep

Tamaño del motor

  • 4.0L

Año

  • 1987
  • 1988
  • 1989
  • 1990
  • 1991
  • 1992
  • 1993
  • 1994
  • 1995
  • 1996
  • 1997
  • 1998
  • 1999
  • 2000
  • 2001

Garantía

Todos los productos están respaldados por nuestra garantía limitada de por vida. Confiamos en nuestra calidad. [Ver términos y condiciones]

Engine Block Heater for Jeep Cherokee (1987-2001) 4.0L

$64.95