Why does the check engine light in my Bonneville turn on when I start my car?

It's okay if your check engine light comes on when you first start your vehicle. This is a sign that your vehicle is testing its circuits. The light should turn off in a bit, but come see us if it doesn't.

Why is my Pontiac Bonneville making engine noise?

Strange engine sounds can be a sign something’s off in your Pontiac Bonneville. Knocking or tapping could be a symptom of low oil. Whistling sounds could mean you have an intake leak or misaligned belt. Squealing can indicate a loose fan belt, and grinding could be a sign that something is wrong with your brakes — not the engine.

What could damage a Pontiac engine? [ordered-list-1-item-3-1]Are you unknowingly damaging your Pontiac Bonneville engine?

Some driving habits are not so great for your engine. These include driving on a near-empty gas tank, revving your engine while the vehicle is in Park, or slamming the gas pedal while the engine is still cold. Steer clear of these habits to help protect engine performance and efficiency.

Can I use water in my Pontiac Bonneville radiator?

Only in emergencies. A 50/50 mix of coolant and water (or a pre-mixed) coolant is recommended. However, if you must keep driving when you're out of coolant, it's better to drive with water in your coolant reservoir than nothing.

What could cause my Bonneville engine to suddenly stop?

Reasons your Bonneville car engine may suddenly stop include engine overheating, electrical troubles, mechanical issues, ignition system problems, faulty sensors, and low fuel.

Who can repair my Pontiac Bonneville engine?

Your local Firestone Complete Auto Care fixes Pontiac Bonneville engines. Book an appointment today! We have thousands of locations across the country.

1985 Pontiac Bonneville Engine Repair

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1985 Pontiac Bonneville Trim Options

Select your Pontiac Bonneville trim level to learn more about Pontiac-recommended engine repair. Use the following chart to find information.

V6/3.8L

V8/5.0L

Repairs for Your 1985 Pontiac Bonneville

Nothing lasts forever. Even your Pontiac Bonneville's many parts and pieces. When something breaks, we're ready. Select a service or repair below to learn more about what we can do for your 1985 Pontiac Bonneville.

We Care for Pontiac Bonneville Engines

Pontiac Bonneville engines are known for their reliability. That might be why you bought it in the first place. However, even your trustworthy engine is subject to wear and tear. Things can go sideways sometimes. When they do, you might find yourself searching for 1985 Pontiac Bonneville engine repair or replacement parts. Luckily, you won’t have to look far, since Firestone Complete Auto Care has 1,700+ locations across the country. We've serviced millions of vehicles since 1926, and our professional technicians are trained to service Pontiac Bonneville engines. Schedule an appointment if you're experiencing problems that could require engine repair. Firestone Complete Auto Care offers both trustworthy and affordable engine repairs.

Illuminated Check Engine Light on 1985 Pontiac Bonneville

If your Bonneville check engine light is on, it’s time to get it looked at. A steady or flashing check engine light could signal a serious issue with your fuel, Possible causes can include a failing oxygen sensor, bad spark plug, a clogged catalytic converter, or a leak in the engine vacuum, to name a few potential sources. Bring your Bonneville in for an on-board diagnostic check and we'll determine exactly why your check engine light is on. Other signs it's time for Pontiac Bonneville engine service might include essential fluid leaks, or engine misfiring.

Engine Repairs for Your 1985 Bonneville

If your 1985 Bonneville engine needs repairs, our technicians will make sure you understand what’s going on before they start working on your engine. We make recommendations, but you make the final decision. If a service can wait, we’ll make sure you know. If it's necessary for your safety, we'll make sure you understand that, too. We want to give you all the details you need to make an informed decision about your engine repairs. Turn to Firestone Complete Auto Care for your 1985 Bonneville engine repairs and you can drive easy knowing that we use Pontiac-approved parts and fluids — serpentine belt, motor oil seal, ignition coil, or other parts.

Engine Q&A 1985 Pontiac Bonneville

Why does the check engine light in my Bonneville turn on when I start my car? It's okay if your check engine light comes on when you first start your vehicle. This is a sign that your vehicle is testing its circuits. The light should turn off in a bit, but come see us if it doesn't.
Why is my Pontiac Bonneville making engine noise? Strange engine sounds can be a sign something’s off in your Pontiac Bonneville. Knocking or tapping could be a symptom of low oil. Whistling sounds could mean you have an intake leak or misaligned belt. Squealing can indicate a loose fan belt, and grinding could be a sign that something is wrong with your brakes — not the engine.
What could damage a Pontiac engine? [ordered-list-1-item-3-1]Are you unknowingly damaging your Pontiac Bonneville engine? Some driving habits are not so great for your engine. These include driving on a near-empty gas tank, revving your engine while the vehicle is in Park, or slamming the gas pedal while the engine is still cold. Steer clear of these habits to help protect engine performance and efficiency.
Can I use water in my Pontiac Bonneville radiator? Only in emergencies. A 50/50 mix of coolant and water (or a pre-mixed) coolant is recommended. However, if you must keep driving when you're out of coolant, it's better to drive with water in your coolant reservoir than nothing.
What could cause my Bonneville engine to suddenly stop? Reasons your Bonneville car engine may suddenly stop include engine overheating, electrical troubles, mechanical issues, ignition system problems, faulty sensors, and low fuel.
Who can repair my Pontiac Bonneville engine? Your local Firestone Complete Auto Care fixes Pontiac Bonneville engines. Book an appointment today! We have thousands of locations across the country.