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Thermostat Housing and Water Necks

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.

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.

Showing In Stock Items. Show All 88 Items.

Individual Parts

Part Groups

Results 1 - 23 of 23

ACDelco GM Genuine Parts Water Necks and Thermostat Housings 12674634

ACDelco GM Genuine Parts Water Necks and Thermostat Housings 12674634

ACDelco GM Genuine Parts Water Necks and Thermostat Housings 12674634

Water Necks and Thermostat Housings, Stock Style, Plastic, Black, O-ring, Cadillac, Chevy, 6.2L Gen V, Each

Part Number: ADO-15-11113

5.0 out of 5 stars ( 5 )

Estimated Ship Date: Today

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ACDelco GM Genuine Parts Water Necks and Thermostat Housings 12600172

ACDelco GM Genuine Parts Water Necks and Thermostat Housings 12600172

ACDelco GM Genuine Parts Water Necks and Thermostat Housings 12600172

Water Neck, O-ring Sealing Style, Aluminum, Natural, 186 degree Thermostat, Buick, Cadillac, Chevy, GMC, Each

Part Number: ADO-15-11057

4.44 out of 5 stars ( 18 )

Estimated Ship Date: Today

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ACDelco Engine Coolant Thermostat Housings 12571261

ACDelco Engine Coolant Thermostat Housings 12571261

ACDelco Engine Coolant Thermostat Housings 12571261

Water Neck, Aluminum, Natural, Each

Part Number: ADO-15-10412

4.5 out of 5 stars ( 4 )

Estimated Ship Date: Today

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ACDelco GM Genuine Parts Water Necks and Thermostat Housings 28290034

ACDelco GM Genuine Parts Water Necks and Thermostat Housings 28290034

ACDelco GM Genuine Parts Water Necks and Thermostat Housings 28290034

Water Necks and Thermostat Housings, GM Genuine Parts, Plastic, Black, Thermostat Included, 217 degrees F Opening Temperature, Buick, Chevrolet, Each

Part Number: ADO-28290034

Not Yet Reviewed

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Mr. Gasket Water Necks 9714

Mr. Gasket Water Necks 9714

Mr. Gasket Water Necks 9714

Water Neck, Steel, Chrome Plated, 90 Degree, Oldsmobile, Big/Small Block, Each

Part Number: MRG-9714

4.25 out of 5 stars ( 4 )

Estimated Ship Date: Today

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ACDelco GM Genuine Parts Water Necks and Thermostat Housings 12587395

ACDelco GM Genuine Parts Water Necks and Thermostat Housings 12587395

ACDelco GM Genuine Parts Water Necks and Thermostat Housings 12587395

Water Neck and Thermostat Housing, Stock, Aluminum, Natural, Buick, Cadillac, Chevrolet, GMC, Hummer, Saab, Each

Part Number: ADO-15-10595

4.0 out of 5 stars ( 2 )

Estimated Ship Date: Today

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ACDelco GM Genuine Parts Water Necks and Thermostat Housings 19193844

ACDelco GM Genuine Parts Water Necks and Thermostat Housings 19193844

ACDelco GM Genuine Parts Water Necks and Thermostat Housings 19193844

Water Neck, Water Outlet, Stock, Aluminum, Stock, Pontiac, V8, L4, Each

Part Number: ADO-15-10282

Not Yet Reviewed

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Dorman Thermostats 902-2016

Dorman Thermostats 902-2016

Dorman Thermostats 902-2016

Water Neck and Thermostat Housing, Stock, Steel, Natural, Buick, Chevrolet, GMC, Oldsmobile, Pontiac, Each

Part Number: RNB-902-2016

1.5 out of 5 stars ( 4 )

Estimated Ship Date: Today

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ACDelco GM Genuine Parts Water Necks and Thermostat Housings 12645998

ACDelco GM Genuine Parts Water Necks and Thermostat Housings 12645998

ACDelco GM Genuine Parts Water Necks and Thermostat Housings 12645998

Water Neck and Thermostat Housing, Stock, Aluminum, Natural, Chevrolet, GMC, Each

Part Number: ADO-15-81954

Not Yet Reviewed

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Four Seasons Water Necks 84841

Four Seasons Water Necks 84841

Four Seasons Water Necks 84841

Water Neck, Replacement, Buick, Cadillac, Chevy, GMC, Oldsmobile, Pontiac, Each

Part Number: FSS-84841

2.33 out of 5 stars ( 6 )

Estimated Ship Date: Today

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ACDelco GM Genuine Parts Water Necks and Thermostat Housings 12556594

ACDelco GM Genuine Parts Water Necks and Thermostat Housings 12556594

ACDelco GM Genuine Parts Water Necks and Thermostat Housings 12556594

Water Neck and Thermostat Housing, Stock, Aluminum, Natural, Cadillac, Chevrolet, GMC, Each

Part Number: ADO-15-1716

Not Yet Reviewed

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Dorman Thermostat Housings 902-2020

Dorman Thermostat Housings 902-2020

Dorman Thermostat Housings 902-2020

Water Neck, Thermostat Housing, Cast Iron, Natural, Gasket Style, Each

Part Number: RNB-902-2020

3.0 out of 5 stars ( 2 )

Estimated Ship Date: Today

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ACDelco GM Genuine Parts Water Necks and Thermostat Housings 25193922

ACDelco GM Genuine Parts Water Necks and Thermostat Housings 25193922

ACDelco GM Genuine Parts Water Necks and Thermostat Housings 25193922

Water Neck, Plastic, Black, Buick, Chevy, 1.4L, Each

Part Number: ADO-15-11105

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Today

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ACDelco GM Genuine Parts Water Necks and Thermostat Housings 12689041

ACDelco GM Genuine Parts Water Necks and Thermostat Housings 12689041

ACDelco GM Genuine Parts Water Necks and Thermostat Housings 12689041

Water Necks and Thermostat Housings, Replacement, Stock Style, Aluminum/Steel, Natural, Buick, Chevrolet, GMC, Saturn, Each

Part Number: ADO-15-11076

Not Yet Reviewed

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ACDelco Water Necks and Thermostat Housings 12681132

ACDelco Water Necks and Thermostat Housings 12681132

ACDelco Water Necks and Thermostat Housings 12681132

HOUSING ASM-ENG COOL THERM

Part Number: ADO-15-81939

Not Yet Reviewed

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ACDelco GM Genuine Parts Water Necks and Thermostat Housings 01647540

ACDelco GM Genuine Parts Water Necks and Thermostat Housings 01647540

ACDelco GM Genuine Parts Water Necks and Thermostat Housings 01647540

Water Necks and Thermostat Housings, Replacement, Stock Style, Steel, Black, Buick, Cadillac, Oldsmobile, Pontiac, Each

Part Number: ADO-15-80767

Not Yet Reviewed

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ACDelco GM Genuine Parts Water Necks and Thermostat Housings for 2011-2016 LACROSSE - 12689039

ACDelco GM Genuine Parts Water Necks and Thermostat Housings for 2011-2016 LACROSSE - 12689039

ACDelco GM Genuine Parts Water Necks and Thermostat Housings for 2011-2016 LACROSSE - 12689039

Water Necks and Thermostat Housings, Replacement, Stock Style, Aluminum/Steel, Natural, Buick, Each

Part Number: ADO-15-81750

Not Yet Reviewed

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ACDelco GM Genuine Parts Water Necks and Thermostat Housings 19193953

ACDelco GM Genuine Parts Water Necks and Thermostat Housings 19193953

ACDelco GM Genuine Parts Water Necks and Thermostat Housings 19193953

Water Necks and Thermostat Housings, Replacement, Stock Style, Steel, Black, Dodge, Jeep, Each

Part Number: ADO-15-10673

Not Yet Reviewed

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ACDelco GM Genuine Parts Water Necks and Thermostat Housings 25201447

ACDelco GM Genuine Parts Water Necks and Thermostat Housings 25201447

ACDelco GM Genuine Parts Water Necks and Thermostat Housings 25201447

Water Necks and Thermostat Housings, Replacement, Stock Style, Aluminum/Steel, Natural, Buick, Cadillac, Chevrolet, GMC, Each

Part Number: ADO-15-81764

Not Yet Reviewed

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ACDelco Water Necks and Thermostat Housings 12707589

ACDelco Water Necks and Thermostat Housings 12707589

ACDelco Water Necks and Thermostat Housings 12707589

OUTLET ASM-WAT

Part Number: ADO-12707589

Not Yet Reviewed

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ACDelco - Water Necks and Thermostat Housings for 2008-2014 CTS, 2008-2011 STS - 12706566

ACDelco - Water Necks and Thermostat Housings for 2008-2014 CTS, 2008-2011 STS - 12706566

ACDelco - Water Necks and Thermostat Housings for 2008-2014 CTS, 2008-2011 STS - 12706566

Engine Coolant Thermostat Housing

Part Number: ADO-12706566

Not Yet Reviewed

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ACDelco GM Genuine Parts Water Necks and Thermostat Housings 12600023

ACDelco GM Genuine Parts Water Necks and Thermostat Housings 12600023

ACDelco GM Genuine Parts Water Necks and Thermostat Housings 12600023

Engine Water Pump Cover, Thermostat Housing, Aluminum, Natural, Buick, Cadillac, Oldsmobile, Pontiac, Each

Part Number: ADO-131-164

Not Yet Reviewed

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ACDelco GM Genuine Parts Water Necks and Thermostat Housings for 2009-2011 AVEO, AVEO5, 2009-2010 G3 - 25199826

ACDelco GM Genuine Parts Water Necks and Thermostat Housings for 2009-2011 AVEO, AVEO5, 2009-2010 G3 - 25199826

ACDelco GM Genuine Parts Water Necks and Thermostat Housings for 2009-2011 AVEO, AVEO5, 2009-2010 G3 - 25199826

Water Necks and Thermostat Housings, Replacement, Stock Style, Aluminum/Plastic, Black/Natural, Chevrolet, Pontiac, 1.6L, Each

Part Number: ADO-15-81766

Not Yet Reviewed

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