Small block chevy thermostat housing with temp sensor

Q: What is a water neck?

The water neck helps to hold the vehicles thermostat in place as it opens and closes to regulate the flow of coolant through your engine. The opening in the water neck created by the thermostat allows coolant to flow from the radiator back to the engine.

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Coolant Thermostat Housing

902-2055

Engine Coolant Thermostat Housing

Application Summary: Chevrolet 1978-71, Chevrolet 1966-65, Chevrolet 1962-61, GMC 1978-71, GMC 1966-64

Product Description

This replacement engine coolant thermostat housing is engineered to match the fit and durability of the stock thermostat housing on specified vehicles. It is designed to withstand extreme temperature changes to extend service life.

Ideal replacement - this engine coolant thermostat housing directly replaces the original housing on specified vehicle years, makes and models
Durable construction - this part is specifically designed to withstand extreme temperature changes and resist cracking and leaking
Cost-effective and reliable - offers original manufacturer quality at lower cost than getting replacement at dealer
Industry-leading design - professionally engineered by the aftermarket leader in replacement thermostat housings

Detailed Applications

Product Specifications

Air Vent (Bleeder Valve):	No
Bolt Hole Diameter:	0.313 in
Bolt Hole Quantity:	2
Bolts Included:	No
Color:	Natural
Gasket or Seal Included:	Yes
Housing Neck Angle (°):	80
Material:	Metal
O Rings Included:	Not Required
Outlet Diameter (in):	1.375 in
Package Contents:	Thermostat Housing with Gasket
Package Quantity:	1
Packaging Type:	Box
Thermostat Included:	No

OE Numbers

DIRECT OE CROSS
3836209	GENERAL MOTORS

Documents & Support

Where To Buy

Below you can search and find your area locations that sell Dorman Products. Please be sure to call the location of your choice to verify this item is in stock and available.

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Engine Coolant Thermostat Housing

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Thermostat housing, water neck, water outlet, coolant housing…they’re all names for the same thing. This component is where the upper radiator hose plugs...

Thermostat housing, water neck, water outlet, coolant housing…they’re all names for the same thing. This component is where the upper radiator hose plugs in, and it also contains your mechanical thermostat. Grab a stock replacement to replace a leaky or broken one, dress up your engine with a chrome or anodized finish, or use a 360° swiveling model for versatility on your custom cooling system.

Top Brands

Our powerful search tools make it easy to find the right water neck from manufacturers like Meziere, Dorman, Mr. Gasket, Four Seasons, Trans-Dapt, ACDelco, and so many more.

Top Brands

Our powerful search tools make it easy to find the right water neck from manufacturers like Meziere, Dorman, Mr. Gasket, Four Seasons, Trans-Dapt, ACDelco, and so many more.

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Edelbrock Water Necks 4817

Water Neck, Aluminum, Polished, O-Ring, 45 degree, Swivel, Chevrolet, Each

Part Number: EDL-4817

4.32 out of 5 stars ( 44 )

Estimated USA Ship Date: Nov 17, 2022 Estimated International Ship Date: Today

This product may not be eligible for select promotional offers

Mr. Gasket Water Necks 2670BK

Water Neck, Aluminum, Black Anodized, Swivel, 30 Degree, Chevrolet, LS, Each

Part Number: MRG-2670BK

4.0 out of 5 stars ( 4 )

Estimated USA Ship Date: Oct 13, 2022 Estimated International Ship Date: Today

This product may not be eligible for select promotional offers

Scott Drake Swivel Water Necks B-8592

Water Neck, Swivel, 45 degree, O-ring Sealing Style, Billet Aluminum, Polished, Ford, Small Block Windsor, Each

Part Number: SDK-B-8592

3.29 out of 5 stars ( 7 )

Estimated USA Ship Date: Oct 24, 2022 Estimated International Ship Date: Today

This product may not be eligible for select promotional offers

Ford Performance Parts Thermostat Housings M-8592-M90

Thermostat Housing, 90 degree, Cast Aluminum, Gasket Sealing Style, Ford, 260, 289, 302, 351W, Each

Part Number: FMS-M-8592-M90

4.53 out of 5 stars ( 34 )

Estimated USA Ship Date: Oct 24, 2022 Estimated International Ship Date: Today

CSR Thermostat Housings CSR 9111C

Water Neck, Billet Aluminum, Clear Anodized, Swivel, 90 Degree, Ford, 260-302/351W, Each

Part Number: CSI-9111C

3.5 out of 5 stars ( 8 )

Estimated USA Ship Date: Nov 7, 2022 Estimated International Ship Date: Today

Summit Racing™ Aluminum Water Necks SUM-370998

Water Neck, Thermostat Housing, Cast Aluminum, Polished, 30 Degree, Swivel, Chevrolet, LS, Each

Part Number: SUM-370998

4.33 out of 5 stars ( 6 )

Estimated USA Ship Date: Sep 26, 2022 Estimated International Ship Date: Oct 27, 2022 if ordered today

Edelbrock Water Necks 48093

Water Neck, 15 Degree, O-Ring, Aluminum, Black, Chevrolet, 4.3, V6, SBC, BBC, Each

Part Number: EDL-48093

4.57 out of 5 stars ( 7 )

Estimated USA Ship Date: Oct 13, 2022 Estimated International Ship Date: Today

This product may not be eligible for select promotional offers

Summit Racing™ Chrome Water Necks SUM-377806

Water Neck, Steel, Chrome Plated, Straight Up, Mopar, Small Block LA, Polysphere, Big Block B/RB/Hemi, Each

Part Number: SUM-377806

3.81 out of 5 stars ( 31 )

Estimated USA Ship Date: Nov 7, 2022 Estimated International Ship Date: Today

Edelbrock Water Necks 48143

Water Neck, 15 Degree, O-Ring, Aluminum, Black, Ford, Small Block, Each

Part Number: EDL-48143

3.78 out of 5 stars ( 9 )

Estimated USA Ship Date: Nov 16, 2022 Estimated International Ship Date: Today

This product may not be eligible for select promotional offers

What is the sensor next to the thermostat housing?

Many cars have more than one coolant temperature sensor. In most cars, the primary ECT sensor (ECT sensor 1) is installed near the thermostat in the cylinder head or block or on the thermostat housing. A second coolant temperature sensor could be installed in another part of the engine, or in the radiator.

What is a water neck?

The water neck helps to hold the vehicle's thermostat in place as it opens and closes to regulate the flow of coolant through your engine. The opening in the water neck created by the thermostat allows coolant to flow from the radiator back to the engine.

How long do thermostat housings last?

But, just how long will a thermostat last? They generally last about 10 years but can last longer depending on the make, model, and type of thermostat. Over time, these systems start to age and a thermostat may malfunction because of normal wear and tear, dust accumulation, wiring issues, and rusting.

Do I need to replace my thermostat housing?

How do I know if my thermostat housing needs to be replaced? If the thermostat housing gets broken, it can cause the coolant to leak and damage of the thermostat itself. A coolant leak can lead to bad cooling and overheating, because of it the thermostat wears out. This overheating can lead to several other problems.