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261298 - Miller 261298 Thermostat Housing Gasket for Cat 1.5T Engine

Packaging: 1 per ea
$56.49/ea $33.85/1 per ea only $33.85/eaSave 40%

Usually ships within 3-5 business days

OVERVIEW

Keep Your Welder Running Cool with the Miller 261298 Gasket

When your livelihood depends on your engine-driven welder, even a small coolant leak can turn into a major headache. The Miller 261298 Gasket is the authentic replacement seal for the thermostat housing on Caterpillar 1.5T engines, commonly used in heavy-duty Miller welding generators. This gasket is the first line of defense against coolant leaks that can lead to engine overheating, automatic shutdowns, and potential internal damage. Don't risk your equipment's performance with ill-fitting generic seals; stick to the parts designed by the manufacturer for your specific machine.

Replacing the thermostat is a standard maintenance procedure for diesel engines, and it is industry best practice to replace the gasket every time the housing is removed. Reusing an old gasket or using liquid sealant alone can result in improper sealing, leading to leaks once the engine reaches operating temperature. The Miller 261298 is designed to compress correctly, filling imperfections in the mating surfaces to create a tight, durable seal that stands up to the vibration and heat of a job site environment.

This part is essential for welders who perform their own equipment maintenance or for service shops looking to stock genuine Miller replacement parts. By ensuring your cooling system is sealed tight, you protect the longevity of the engine and ensure consistent performance during demanding welding tasks. Keep a spare in your maintenance kit to avoid downtime when you need it most.

Maintenance Tips:

  • Always clean the mating surfaces of the thermostat housing and engine block thoroughly before installing the new gasket.
  • Torque housing bolts to the manufacturer's specifications to ensure even compression without damaging the gasket.
  • Check coolant levels after installation and run the engine to operating temperature to verify the seal.
Additional Information
Brand:Miller
Packaging Description:1 Per Ea
Compatible Engine:Caterpillar 1.5T
Part Type:Thermostat Gasket

INCLUDED

  • (1) Thermostat Gasket

APPLICATIONS

  • Thermostat replacement on Miller welders with Caterpillar 1.5T engines
  • Repairing coolant leaks at the thermostat housing
  • Routine diesel engine cooling system maintenance
  • Overhaul of Cat 1.5T engine cooling components

FAQ

This gasket is designed for the Caterpillar 1.5T (Turbo) diesel engine used in various Miller engine-driven welders.

Yes, this is the authentic Miller Electric OEM part number 261298.

Generally, OEM gaskets are designed to be installed dry or with a specific tack spray. Refer to your engine's service manual, but avoid excessive RTV silicone unless specified.

No, gaskets compress to form a seal and take a 'set'. Once removed, they cannot be reused reliably and should always be replaced.

Look for wet spots, dried coolant residue (often white or green), or dripping around the thermostat housing on the engine block.

No, this SKU is for the gasket only. The thermostat itself is sold separately.

A failed gasket leads to coolant loss, which can cause the engine to overheat and potentially suffer severe damage if not addressed immediately.

This is specifically listed for the Cat 1.5T. It is unlikely to fit Perkins, Kubota, or Deutz engines unless they share the exact same housing design.