Generac 099729A Housing Thermostat Imprex

Description

Genuine Generac 099729A Thermostat Housing for Select GM 4.3L Generators

The Generac 099729A Thermostat Imprex Housing is a genuine OEM cooling-system component for select older Generac liquid-cooled generators equipped with a GM 4.3L gasoline engine. Generac’s catalog lists it as “Housing Therm Imprex.” It forms part of the engine’s thermostat and coolant-routing assembly.

“Imprex” is Generac’s catalog description for this component. It is not an electronic or building thermostat.

Why Replace a Damaged Thermostat Housing?

A cracked, corroded, distorted, or leaking housing can compromise the sealed coolant passage. Replacing it can help restore a properly sealed cooling system and dependable coolant circulation. The Generac 099729A is manufactured for the original generator configuration, so it is a direct OEM replacement choice for the generators listed below.

Generac 099729A Product Features

• Genuine Generac OEM replacement part
• Part number: 099729A
• Cooling-system thermostat housing component
• Designed for select GM 4.3L liquid-cooled generator engines
• Helps maintain a sealed coolant passage
• Manufactured for the original generator configuration
• Sold individually
• Condition: New

Selected Applications

This housing is intended for select Generac generators with the applicable GM 4.3L engine, including:

• Select Generac Guardian 40kW liquid-cooled generators
• Select model 004373-series generators
• Select model 004626-series generators
• Additional compatible generators equipped with the applicable GM 4.3L engine

Generac parts documentation lists 099729A in the cooling system of select 40kW Guardian generators with GM 4.3L engines. Always verify compatibility using the generator model, serial number, engine designation, and original housing number before ordering.

Product Information

• Manufacturer: Generac
• Brand: Generac
• Part number: 099729A
• Catalog description: Housing Therm Imprex
• Product type: Thermostat/cooling-system housing
• Engine application: Select GM 4.3L engines
• Quantity: 1 housing

What Is Not Included With the Generac 099729A

Unless expressly included in the package description, this listing does not include:

• Thermostat
• Thermostat gasket
• Water-inlet housing
• Temperature sender or shutdown sensor
• Pipe plug
• Coolant hoses
• Mounting bolts

Related Generac Parts

You may need these items for a complete service. Check each one against your generator before ordering:

• 075885 – 195-degree thermostat
• 0A2440 – Thermostat gasket
• 069939 – Thermostat/water-inlet housing
• 035606 – High-coolant-temperature shutdown sensor
• 061012 – Pipe plug

Installation Information for the Generac 099729A

Allow the engine to cool completely before opening the cooling system. Drain the coolant to the appropriate level, disconnect all generator power sources, and clean the mating surfaces before installing the replacement housing.

Use the correct gasket and tightening procedure specified in the generator service manual. During service, inspect the thermostat, hoses, sensors, fasteners, and adjoining water-inlet housing. Refill the system with the approved coolant, remove trapped air, and check carefully for leaks.

Frequently Asked Questions

What is the Generac 099729A Imprex housing?

The Generac 099729A is a genuine OEM thermostat/cooling-system housing for select older Generac liquid-cooled generators with a GM 4.3L gasoline engine. “Imprex” is Generac’s catalog description for this part. It is not an electronic or building thermostat.

Does this housing include the thermostat and gasket?

No. Unless the package description expressly says otherwise, the thermostat, thermostat gasket, water-inlet housing, sensors, pipe plug, coolant hoses, and mounting bolts are not included. Related part numbers are listed above.

How do I confirm this housing fits my generator?

Compare your generator model, serial number, engine designation, and original housing number with the part details before ordering. Generac parts documentation lists 099729A in the cooling system of select 40kW Guardian generators with GM 4.3L engines.