Q: I DROVE THRU A FLOOD & MY CAR STALLED. NOW THAT IT STARTS ITS KNOCKING... WHAT CAN BE CAUSING THIS?

asked by on

A FLOOD & MY CAR STALLED. NOW THAT IT STARTS ITS KNOCKING... WHAT CAN BE CAUSING THIS?

My car has 78000 miles.

If you drove through deep water, chances are your engine took in some water and did internal damage to it. When engine suck in water, they cannot compress the water that gets into the cylinder, so it usually locks up the motor or causes a connecting rod to bend or break. It also could have damaged the engine bearings, which will also make a loud knocking noise. I would have the problem professionally diagnosed, and I would have it done soon. If the engine was in fact damaged, you will need to have it replaced or rebuilt, and it can be very expensive. You can contact a qualified professional, such as one from YourMechanic, diagnose the noise at your home or office. In the future, never drive through deep puddles or standing water. If you have no choice, then slow down to about 5 mph and coast very slowly through it, do not step on the accelerator any more than you have to, as that would allow more water to be sucked in.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. I DROVE THRU A FLOOD & MY CAR STALLED. NOW THAT IT STARTS ITS KNOCKING... WHAT CAN BE CAUSING THIS?

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: I Have a broken bolt in my exhaust

You may want to try an easy out kit which sometimes is helpful in removing broken bolts where the only option may otherwise be having to drill it out. In some cases, heating the area up will allow the broken...

Q: If a left cv axle is bad, would you lose power to the wheel? Would it also effect the right side?

The CV axle is just a shaft with joints on each end. The axle will transmit whatever power is applied to it but if the splines on the shaft are sheared off, or a joint is physically broken (separated), the...

Q: My temperature gauge reads cold - 2004 Chrysler Sebring

Hello there. A few common faults will cause your 2004 Chrysler Sebring to to stay at C on the temperature gauge. The most common are a faulty coolant temperature sensor, failing temperature gauge, or wiring harness fault. If the engine...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...