Q: Bad engine knock, what can I do?

asked by on

The engine in my 2007 Ford Fusion starting knocking violently driving the other day. I was pretty surprised, given that the car has just under 80,000 on it and it is never driven hard. I pulled over and killed the engine. When I tried to start it back up, nothing happened. What would make an engine so low in mileage fail completely?

The 2007 Ford Fusion 2.3l Duratec is usually a very dependable engine with few problems. However, there are several issues that could cause knocking and engine seizure. The engine oil filter in this engine is a cartridge type that has a cover that can get warped if over tightened during an oil change. This may potentially cause a sudden oil leak in which an engine could lose most of its oil in a short period and could starve the engine of oil pressure. The loss of oil pressure could cause the engine to knock loudly and seize up. Another possible problem is that the engine front crankshaft damper pulley is not keyed to the crankshaft assembly on this engine. If the damper pulley bolt comes loose without the camshaft timing gears held in place, the timing between the camshaft and crankshaft will not be in sync with each other. If this happens, the cylinder head valves would hit the tops of the pistons, potentially causing the engine to seize and a loud engine knocking noise. YourMechanic will need to determine if your engine was starved of oil or the timing is out of sync. Either way your engine would need to be replaced.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  1. Home
  2. Questions
  3. Bad engine knock, what can I do?

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: What does the “CHECK BRAKE SYSTEM” warning mean in the message center?

Quite a few different warning messages can be displayed in your car’s message center. If you see one that reads “CHECK BRAKE SYSTEM,” it means that the car’s computer has detected a problem with the Brake system and it needs...

Q: Engine died, do I have to replace it now?

The noise you are hearing could be one of several problems. The first and easiest to fix would be to use only manufacturer certified oil filters during oil and filter changes. The oil filter used may not have a built-in...

Q: Car only drives in Reverse

With the symptoms you have described, the most likely cause is a leak in the transmission. When the fluid level changes drastically, the transmission loses the ability to pump fluid and transfer power. A qualified technician, such as one from...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...