Why does the check engine light come on when I start my 635CSi?

It’s usually normal for your check engine light to turn on upon ignition. This is a sign that your vehicle is testing its circuits. The dash light shouldn't stay on. If it does, you might want to bring your vehicle in for service.

Why is my BMW 635CSi making engine noise?

Strange under-the-hood noises can point to problems within your BMW 635CSi engine. Tapping or knocking could mean you're low on oil. Whistling could mean a belt is misaligned or there's an intake leak. Squealing can indicate a loose fan belt, and grinding might be a sign of brake problems rather than engine issues.

What could damage a BMW engine? [ordered-list-1-item-3-1]Are you unknowingly damaging your BMW 635CSi engine?

Certain driving habits can damage your engine and should be avoided. These habits include 'running on fumes,' flooring the gas pedal while the car is in Park, or slamming the gas pedal while the engine is still cold. Help sustain your engine’s performance and efficiency by staying miles away from these bad driving practices.

Can I use water in my BMW 635CSi 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 can cause a 635CSi engine to suddenly stop?

If your 635CSi car engine suddenly stops, it could be due to overheating, low fuel, a faulty ignition system, sensor problems, electrical system trouble, or mechanical issues.

Who can repair my BMW 635CSi engine?

Your local Firestone Complete Auto Care offers BMW 635CSi engine repair. Schedule an appointment today at one of our thousands of locations nationwide!

Reliable Repairs for 1986 BMW 635CSi Engines

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1986 BMW 635CSi Trim Options

Select your BMW 635CSi trim level to learn more about BMW-recommended engine repair. Even BMW 635CSi parts will get older and change.

L6/3.5L

1986 BMW 635CSi Repair

Stuff wears out. Even your BMW 635CSi’s engine parts and components will change. When something breaks, we're ready. Select a service or repair below to learn more about what we can do for your 1986 BMW 635CSi.

We’re Trained to Care for BMW 635CSi Engines

BMW 635CSi engines are known for their reliability. You may have even been thinking about that when you bought it. However, even your trustworthy engine is subject to wear and tear. Things can go sideways sometimes. If they do, you’ll have to find a dependable 1986 BMW service center — quick! That's when it's time to head to Firestone Complete Auto Care. We've serviced more than 500 million vehicles since 1926, and our technicians know BMW 635CSi engines. If you think something’s wrong with your engine, schedule an appointment at your convenience. Firestone Complete Auto Care offers both trustworthy and affordable engine repairs.

My 1986 BMW 635CSi Check Engine Light Is On

As soon as your 635CSi check engine light turns on, it’s time to get an expert’s opinion. A check engine light that’s on or flashing could be a symptom of a serious problem in your vehicle's ignition, Causes may include a faulty oxygen sensor, worn spark plug, a problem with your catalytic converter, or an engine vacuum leak, to name a few possible causes. Bring your 635CSi in for an on-board diagnostic check and our expert techs will get the root of the problem. Other signs your BMW 635CSi engine needs some TLC are burning smells, or engine misfiring.

BMW 635CSi Engine Repair

When your BMW 635CSi engine needs repairs, our technicians will provide you with a thorough explanation beforehand. We never do any work without your sign-off. If a service can wait, we’ll make sure you know. We'll also tell you if it's necessary for your safety. 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 1986 635CSi engine repairs and you can feel confident knowing that we use BMW-approved parts and components like the cambelt, oil gasket, sensors, or a different component.

Questions About 1986 BMW 635CSi Engines

Why does the check engine light come on when I start my 635CSi? It’s usually normal for your check engine light to turn on upon ignition. This is a sign that your vehicle is testing its circuits. The dash light shouldn't stay on. If it does, you might want to bring your vehicle in for service.
Why is my BMW 635CSi making engine noise? Strange under-the-hood noises can point to problems within your BMW 635CSi engine. Tapping or knocking could mean you're low on oil. Whistling could mean a belt is misaligned or there's an intake leak. Squealing can indicate a loose fan belt, and grinding might be a sign of brake problems rather than engine issues.
What could damage a BMW engine? [ordered-list-1-item-3-1]Are you unknowingly damaging your BMW 635CSi engine? Certain driving habits can damage your engine and should be avoided. These habits include 'running on fumes,' flooring the gas pedal while the car is in Park, or slamming the gas pedal while the engine is still cold. Help sustain your engine’s performance and efficiency by staying miles away from these bad driving practices.
Can I use water in my BMW 635CSi 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 can cause a 635CSi engine to suddenly stop? If your 635CSi car engine suddenly stops, it could be due to overheating, low fuel, a faulty ignition system, sensor problems, electrical system trouble, or mechanical issues.
Who can repair my BMW 635CSi engine? Your local Firestone Complete Auto Care offers BMW 635CSi engine repair. Schedule an appointment today at one of our thousands of locations nationwide!