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  2. Auto Parts
  3. Belts and Cooling
  4. Thermostat and Housing
  5. Engine Coolant Thermostat
  6. ACDelco 12T18D

ACDelco 12T18D Engine Coolant Thermostat

ACDelco 12T18D Engine Coolant Thermostat

ACDelco
Brand:ACDelco
Part Number: 12T18D
UPC: 00707773060759
Weight: 0.13 lbs
Condition:New



Availability:
0 in Stock
 OUT OF STOCK

Product Information

Description:

THERMOSTAE (B)

ACDelco Professional Engine Coolant Thermostats control the flow of coolant through your vehicle's radiator to help the engine reach and maintain its optimal operating temperature, and are a high quality replacement for many vehicles on the road today. These engine coolant thermostats are manufactured to meet your expectations for fit, form, and function. ⚠ WARNING: Cancer and Reproductive Harm - https://www.P65Warnings.ca.gov

Features and Benefits:

  • Controls the flow of coolant through the radiator to help your vehicle's engine reach and maintain its optimal operating temperature
  • Manufactured to meet expectations for fit, form, and function
  • Professional, premium aftermarket replacement
  • Provides the performance and dependability you expect from ACDelco

Specifications:

Jiggle Pin Weep Hole:
No
Overall Height (mm):
45.4 mm
Seal Type:
Gasket
Sealing Flange Outside Diameter:
2.125 in.
Sealing Flange Outside Diameter:
54 mm
Start to Open Temperature:
180 Degrees Fahrenheit
Start to Open Temperature:
82 Degrees Celsius, Centigrade

Features and Benefits:

  • – Have cooling system inspected immediately if instrument panel-mounted temperature gauge indicates engine overheating

Specifications:

Country of Origin:
IL

Select a vehicle to narrow ACDelco 12T18D Engine Coolant Thermostat fitment info!

Last Updated: 05/20/2023

Years Vehicle Per Vehicle Fit NotesFitment Notes

2001

 

2001

 
Blue Bird All American RE

6.8L 6 CNG
1
 
Gold
Temperature 180F
Standard
Alternate Temp
 

Blue Bird All American RE



6.8L 6 CNG Gold
Temperature 180F
Standard
Alternate Temp

1 Per Vehicle

2002

 

2001

 

2002

 

2001

 
Blue Bird Commercial Bus

6.8L 6 CNG
1
 
Gold
Temperature 180F
Standard
Alternate Temp
 

Blue Bird Commercial Bus



6.8L 6 CNG Gold
Temperature 180F
Standard
Alternate Temp

1 Per Vehicle

1996

 

1996

 
Blue Bird Commercial Bus

6.8L 6 CNG
1
 
Gold
Temperature 180F
Standard
Alternate Temp
 

Blue Bird Commercial Bus



6.8L 6 CNG Gold
Temperature 180F
Standard
Alternate Temp

1 Per Vehicle

2000

 

1999

 

2000

 

1999

 
Blue Bird TC2000

6.8L 6 CNG
1
 
Gold
Temperature 180F
Standard
Alternate Temp
 

Blue Bird TC2000



6.8L 6 CNG Gold
Temperature 180F
Standard
Alternate Temp

1 Per Vehicle

1976

 

1975

 

1976

 

1975

 
Cadillac Calais

8.2L V8 Gas OHV
1
 
Gold
Temperature 180F
Standard
Alternate Temp
 

Cadillac Calais



8.2L V8 Gas OHV Gold
Temperature 180F
Standard
Alternate Temp

1 Per Vehicle

1974

 

1973

 

1972

 

1971

 

1970

 

1969

 

1968

 

1974

 

1973

 

1972

 

1971

 

1970

 

1969

 

1968

 
Cadillac Calais

7.7L V8 Gas OHV
1
 
Gold
Temperature 180F
Standard
Alternate Temp
 

Cadillac Calais



7.7L V8 Gas OHV Gold
Temperature 180F
Standard
Alternate Temp

1 Per Vehicle

1984

 

1983

 

1982

 

1981

 

1980

 

1984

 

1983

 

1982

 

1981

 

1980

 
Cadillac Commercial Chassis

6.0L V8 Gas OHV
1
 
Gold
Temperature 180F
Standard
Alternate Temp
 

Cadillac Commercial Chassis



6.0L V8 Gas OHV Gold
Temperature 180F
Standard
Alternate Temp

1 Per Vehicle

1979

 

1978

 

1977

 

1979

 

1978

 

1977

 
Cadillac Commercial Chassis

7.0L V8 Gas OHV
1
 
Gold
Temperature 180F
Standard
Alternate Temp
 

Cadillac Commercial Chassis



7.0L V8 Gas OHV Gold
Temperature 180F
Standard
Alternate Temp

1 Per Vehicle

1976

 

1975

 

1976

 

1975

 
Cadillac Commercial Chassis

8.2L V8 Gas OHV
1
 
Gold
Temperature 180F
Standard
Alternate Temp
 

Cadillac Commercial Chassis



8.2L V8 Gas OHV Gold
Temperature 180F
Standard
Alternate Temp

1 Per Vehicle

1974

 

1973

 

1972

 

1971

 

1974

 

1973

 

1972

 

1971

 
Cadillac Commercial Chassis

7.7L V8 Gas OHV
1
 
Gold
Temperature 180F
Standard
Alternate Temp
 

Cadillac Commercial Chassis



7.7L V8 Gas OHV Gold
Temperature 180F
Standard
Alternate Temp

1 Per Vehicle

1981

 

1980

 

1981

 

1980

 
Cadillac DeVille

6.0L V8 Gas OHV
1
 
Gold
Temperature 180F
Standard
Alternate Temp
 

Cadillac DeVille



6.0L V8 Gas OHV Gold
Temperature 180F
Standard
Alternate Temp

1 Per Vehicle

1979

 

1979

 
Cadillac DeVille

5.7L V8 Diesel OHV
1
 
Gold
Temperature 180F
Standard
Alternate Temp
 

Cadillac DeVille



5.7L V8 Diesel OHV Gold
Temperature 180F
Standard
Alternate Temp

1 Per Vehicle

1979

 

1978

 

1977

 

1979

 

1978

 

1977

 
Cadillac DeVille

7.0L V8 Gas OHV
1
 
Gold
Temperature 180F
Standard
Alternate Temp
 

Cadillac DeVille



7.0L V8 Gas OHV Gold
Temperature 180F
Standard
Alternate Temp

1 Per Vehicle

1976

 

1975

 

1976

 

1975

 
Cadillac DeVille

8.2L V8 Gas OHV
1
 
Gold
Temperature 180F
Standard
Alternate Temp
 

Cadillac DeVille



8.2L V8 Gas OHV Gold
Temperature 180F
Standard
Alternate Temp

1 Per Vehicle

1974

 

1973

 

1972

 

1971

 

1970

 

1969

 

1968

 

1974

 

1973

 

1972

 

1971

 

1970

 

1969

 

1968

 
Cadillac DeVille

7.7L V8 Gas OHV
1
 
Gold
Temperature 180F
Standard
Alternate Temp
 

Cadillac DeVille



7.7L V8 Gas OHV Gold
Temperature 180F
Standard
Alternate Temp

1 Per Vehicle

1981

 

1980

 

1981

 

1980

 
Cadillac Eldorado

6.0L V8 Gas OHV
1
 
Gold
Temperature 180F
Standard
Alternate Temp
 

Cadillac Eldorado



6.0L V8 Gas OHV Gold
Temperature 180F
Standard
Alternate Temp

1 Per Vehicle

1978

 

1977

 

1978

 

1977

 
Cadillac Eldorado

7.0L V8 Gas OHV
1
 
Gold
Temperature 180F
Standard
Alternate Temp
 

Cadillac Eldorado



7.0L V8 Gas OHV Gold
Temperature 180F
Standard
Alternate Temp

1 Per Vehicle

1976

 

1975

 

1974

 

1973

 

1972

 

1971

 

1970

 

1976

 

1975

 

1974

 

1973

 

1972

 

1971

 

1970

 
Cadillac Eldorado

8.2L V8 Gas OHV
1
 
Gold
Temperature 180F
Standard
Alternate Temp
 

Cadillac Eldorado



8.2L V8 Gas OHV Gold
Temperature 180F
Standard
Alternate Temp

1 Per Vehicle

1969

 

1968

 

1969

 

1968

 
Cadillac Eldorado

7.7L V8 Gas OHV
1
 
Gold
Temperature 180F
Standard
Alternate Temp
 

Cadillac Eldorado



7.7L V8 Gas OHV Gold
Temperature 180F
Standard
Alternate Temp

1 Per Vehicle

1984

 

1983

 

1984

 

1983

 
Cadillac Fleetwood

6.0L V8 Gas OHV
1
 
Gold
Temperature 180F
Standard
Alternate Temp
 

Cadillac Fleetwood



6.0L V8 Gas OHV Gold
Temperature 180F
Standard
Alternate Temp

1 Per Vehicle

1982

 

1982

 
Cadillac Fleetwood

6.0L V8 Gas OHV
1
 
Gold
Temperature 180F
Standard
Alternate Temp
8th VIN Digit: 6
 

Cadillac Fleetwood



6.0L V8 Gas OHV Gold
Temperature 180F
Standard
Alternate Temp
8th VIN Digit: 6

1 Per Vehicle

1982

 

1982

 
Cadillac Fleetwood

6.0L V8 Gas OHV
1
 
Gold
Temperature 180F
Standard
Alternate Temp
8th VIN Digit: 9
 

Cadillac Fleetwood



6.0L V8 Gas OHV Gold
Temperature 180F
Standard
Alternate Temp
8th VIN Digit: 9

1 Per Vehicle

1981

 

1980

 

1981

 

1980

 
Cadillac Fleetwood

6.0L V8 Gas OHV
1
 
Gold
Temperature 180F
Standard
Alternate Temp
 

Cadillac Fleetwood



6.0L V8 Gas OHV Gold
Temperature 180F
Standard
Alternate Temp

1 Per Vehicle

1979

 

1978

 

1977

 

1979

 

1978

 

1977

 
Cadillac Fleetwood

7.0L V8 Gas OHV
1
 
Gold
Temperature 180F
Standard
Alternate Temp
 

Cadillac Fleetwood



7.0L V8 Gas OHV Gold
Temperature 180F
Standard
Alternate Temp

1 Per Vehicle

1976

 

1975

 

1976

 

1975

 
Cadillac Fleetwood

8.2L V8 Gas OHV
1
 
Gold
Temperature 180F
Standard
Alternate Temp
 

Cadillac Fleetwood



8.2L V8 Gas OHV Gold
Temperature 180F
Standard
Alternate Temp

1 Per Vehicle

1974

 

1973

 

1972

 

1971

 

1970

 

1969

 

1968

 

1974

 

1973

 

1972

 

1971

 

1970

 

1969

 

1968

 
Cadillac Fleetwood

7.7L V8 Gas OHV
1
 
Gold
Temperature 180F
Standard
Alternate Temp
 

Cadillac Fleetwood



7.7L V8 Gas OHV Gold
Temperature 180F
Standard
Alternate Temp

1 Per Vehicle

1973

 

1973

 
Cadillac Fleetwood

7.7L V8 Gas
1
 
Gold
Temperature 180F
Standard
Alternate Temp
 

Cadillac Fleetwood



7.7L V8 Gas Gold
Temperature 180F
Standard
Alternate Temp

1 Per Vehicle

1981

 

1981

 
Cadillac Seville

6.0L V8 Gas OHV
1
 
Gold
Temperature 180F
Standard
Alternate Temp
 

Cadillac Seville



6.0L V8 Gas OHV Gold
Temperature 180F
Standard
Alternate Temp

1 Per Vehicle

1980

 

1980

 
Cadillac Seville

5.7L V8 Gas OHV
1
 
Gold
Temperature 180F
Standard
Alternate Temp
8th VIN Digit: 8
 

Cadillac Seville



5.7L V8 Gas OHV Gold
Temperature 180F
Standard
Alternate Temp
8th VIN Digit: 8

1 Per Vehicle

1980

 

1980

 
Cadillac Seville

6.0L V8 Gas OHV
1
 
Gold
Temperature 180F
Standard
Alternate Temp
8th VIN Digit: 9
 

Cadillac Seville



6.0L V8 Gas OHV Gold
Temperature 180F
Standard
Alternate Temp
8th VIN Digit: 9

1 Per Vehicle

1988

 

1987

 

1988

 

1987

 
International 1754

9.0L V8 Diesel
1
 
Gold
Temperature 180F
Standard
 

International 1754



9.0L V8 Diesel Gold
Temperature 180F
Standard

1 Per Vehicle

1986

 

1985

 

1986

 

1985

 
International 1754

9.0L V8 Diesel
1
 
Gold
Temperature 180F
Standard
Alternate Temp
 

International 1754



9.0L V8 Diesel Gold
Temperature 180F
Standard
Alternate Temp

1 Per Vehicle

1988

 

1987

 

1986

 

1985

 

1984

 

1983

 

1982

 

1981

 

1980

 

1988

 

1987

 

1986

 

1985

 

1984

 

1983

 

1982

 

1981

 

1980

 
International 1854

9.0L V8 Diesel
1
 
Gold
Temperature 180F
Standard
 

International 1854



9.0L V8 Diesel Gold
Temperature 180F
Standard

1 Per Vehicle

1984

 

1984

 
International 1954

9.0L V8 Diesel
1
 
Gold
Temperature 180F
Standard
 

International 1954



9.0L V8 Diesel Gold
Temperature 180F
Standard

1 Per Vehicle

1980

 

1980

 
International 1954

9.0L V8 Diesel
1
 
Gold
Temperature 180F
Standard
 

International 1954



9.0L V8 Diesel Gold
Temperature 180F
Standard

1 Per Vehicle

1982

 

1981

 

1982

 

1981

 
International 1955

9.0L V8 Diesel
1
 
Gold
Temperature 180F
Standard
 

International 1955



9.0L V8 Diesel Gold
Temperature 180F
Standard

1 Per Vehicle

1980

 

1980

 
International 2155

9.0L V8 Diesel
1
 
Gold
Temperature 180F
Standard
 

International 2155



9.0L V8 Diesel Gold
Temperature 180F
Standard

1 Per Vehicle

1986

 

1985

 

1984

 

1986

 

1985

 

1984

 
International Cargostar

9.0L L6 Diesel Turbo
1
 
Gold
Temperature 180F
Standard
 

International Cargostar



9.0L L6 Diesel Turbo Gold
Temperature 180F
Standard

1 Per Vehicle

1980

 

1980

 
International Cargostar

6.6L V8 Gas,
7.3L V8 Gas
1
 
Gold
Temperature 180F
Standard
 

International Cargostar



6.6L V8 Gas,
7.3L V8 Gas Gold
Temperature 180F
Standard

1 Per Vehicle

1982

 

1981

 

1980

 

1982

 

1981

 

1980

 
International F1954

9.0L V8 Diesel
1
 
Gold
Temperature 180F
Standard
 

International F1954



9.0L V8 Diesel Gold
Temperature 180F
Standard

1 Per Vehicle

1988

 

1987

 

1986

 

1988

 

1987

 

1986

 
International S1754

9.0L L6 Diesel Turbo
1
 
Gold
Temperature 180F
Standard
 

International S1754



9.0L L6 Diesel Turbo Gold
Temperature 180F
Standard

1 Per Vehicle

1988

 

1987

 

1986

 

1985

 

1984

 

1988

 

1987

 

1986

 

1985

 

1984

 
International S1853

9.0L L6 Diesel Turbo
1
 
Gold
Temperature 180F
Standard
 

International S1853



9.0L L6 Diesel Turbo Gold
Temperature 180F
Standard

1 Per Vehicle

1987

 

1986

 

1985

 

1984

 

1987

 

1986

 

1985

 

1984

 
International S1854

9.0L L6 Diesel Turbo
1
 
Gold
Temperature 180F
Standard
 

International S1854



9.0L L6 Diesel Turbo Gold
Temperature 180F
Standard

1 Per Vehicle


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