Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSBUICK1991CENTURY L4-151 2.5L VIN R TBIREPAIR AND DIAGNOSISSPECIFICATIONSCAPACITY SPECIFICATIONSCOOLING SYSTEMSYSTEM SPECIFICATIONS
1991 Buick Century L4-151 2.5L VIN R TBI
System Specifications
1991 Buick Century L4-151 2.5L VIN R TBISECTION System Specifications
MAKE, YEAR & MODEL LITERS QUARTS
BUICK CENTURY, REGAL
1992 Regal: 3.1L 12.0 12.5
3.8L 10.5 11.0
Century: 2.5L 9.5 10.0
3.3L 12.0 13.0
1991-89 Century: 4-cyl 9.0 9.5
V6 3.3L 12.5 13.0
1989-88 Regal 12.0 12.5
1988-86 Century: 4-cyl 9.0 9.5
V6. 2.8L (173) 12.0 12.5
3.8L (231) 11.5 12.0
1987-86 Regal: V6 ex Turbo 12.5 13.0
V6 Turbo 11.5 12.0
V8 5.0L (307) 14.0, 15.0* 15.0, 16.0*
V8 5.0L (305) Canada 14.5, 15.0 15.5, 16,0*
1985 Century V6: 3.0L (181) 12.0, 12.5* 12.5, 13.0*
4.3L (262) Diesel 12.0 12.5
Somerset Regal 4-cyl. 6.0 7.0
V6 9.5, 10.5* 10.0, 11.0*
1985-84 Century 4-cyl. 9.0 9.5
3.8L (231) 11.5, 12.01 12.0, 12.5*
Regal: V6 ex Diesel & Turbo 12.5 13.0
Diesel 14.0 15.0
Turbo 12.5, 12.0* 13.5, 13.0*
1984 V6: 3.0L (181) 13.5, 13.0* 14.5, 13.5*
4.3L (262) Diesel 13.0, 12.5* 13.5, 13,0*
1983 Century: 4-cyl 9.0, 9.5* 9.5, 10.0*
V6 3.0L (181) 13.5, 13.0* 14.5, 13.5*
Diesel 13.0 13.5
Regal: V6 ex. Diesel & Turbo 12.5 13.0
Turbo 13.0 13.5
Diesel 14.0 15.0
* Indicates with air conditioning
BUICK CENTURY, REGAL
1992 Regal: 3.1L 12.0 12.5
3.8L 10.5 11.0
Century: 2.5L 9.5 10.0
3.3L 12.0 13.0
1991-89 Century: 4-cyl 9.0 9.5
V6 3.3L 12.5 13.0
1989-88 Regal 12.0 12.5
1988-86 Century: 4-cyl 9.0 9.5
V6. 2.8L (173) 12.0 12.5
3.8L (231) 11.5 12.0
1987-86 Regal: V6 ex Turbo 12.5 13.0
V6 Turbo 11.5 12.0
V8 5.0L (307) 14.0, 15.0* 15.0, 16.0*
V8 5.0L (305) Canada 14.5, 15.0 15.5, 16,0*
1985 Century V6: 3.0L (181) 12.0, 12.5* 12.5, 13.0*
4.3L (262) Diesel 12.0 12.5
Somerset Regal 4-cyl. 6.0 7.0
V6 9.5, 10.5* 10.0, 11.0*
1985-84 Century 4-cyl. 9.0 9.5
3.8L (231) 11.5, 12.01 12.0, 12.5*
Regal: V6 ex Diesel & Turbo 12.5 13.0
Diesel 14.0 15.0
Turbo 12.5, 12.0* 13.5, 13.0*
1984 V6: 3.0L (181) 13.5, 13.0* 14.5, 13.5*
4.3L (262) Diesel 13.0, 12.5* 13.5, 13,0*
1983 Century: 4-cyl 9.0, 9.5* 9.5, 10.0*
V6 3.0L (181) 13.5, 13.0* 14.5, 13.5*
Diesel 13.0 13.5
Regal: V6 ex. Diesel & Turbo 12.5 13.0
Turbo 13.0 13.5
Diesel 14.0 15.0
* Indicates with air conditioning
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.