Water & Flood Driving Advice

It is likely through the winter months that you will encounter some flood water, either as large puddles on the road, or where a river/stream has burst its banks.

Take a different route where possible.

Never drive through flood water when you cannot see the ground under the water. It could be far deeper than you imagine, and if it is a river in flood there is a danger you and your vehicle could be swept away.

  • On encountering flood water, get out and check the depth. Water which comes above the bottom edge of your door can cause problems with the engine. Water can get splashed up into the engine compartment, leading to stalling.
  • Drive slowly. Put your vehicle in 1st gear and maintain a very slow, steady speed. If you hit flood water at speed you will first lose control, then come to an abrupt stop.
  • If you do stall in deep water, get someone to tow you out. If you are unsure of the depth of the water, or if it is moving water, stay in the vehicle and await rescue. Use your mobile phone to call for assistance.

If you have been driving through flood water, even if your vehicle seems fine, take time to check it over before driving it again.

  1. First, walk around your vehicle looking for any obvious scratches, bumps, cracks or things hanging off.
  2. Next, check the interior for damage. Look at the upholstery, carpets and door panels for areas of damp. If you find damp patches, don’t be tempted to just leave them to dry out – this will result in a rather unpleasant musty, damp smell. Instead, take your vehicle to a garage and have it professionally cleaned and dried.
  3. Check the engine oil and transmission fluid. If the fluid on the dipstick looks diluted, milky or beige, then water has got in. It is advisable not to drive your vehicle at this point, as it may cause further damage to the internal components of the car. Instead, have it towed to your nearest garage for repair.
  4. Check the air filter. If it is damp, replace it and change the oil.
  5. Take a bit of time to look underneath the vehicle for stuck-on dirt, mud, grass and bits of debris. If you spot any, wash it off as soon as possible to avoid it causing damage to the undercarriage.
  6. The brake system is crucial so it is best to take it to your nearest garage to have it professionally checked.
  7. Check the lights and indicators for rust and water damage. If there is water in them, replace the bulb.
  8. While the engine is running, listen for any abnormal running sounds, and have them checked out as soon as possible.

Remember – It is better to go through the time and costs of checking your vehicle now, rather than wait until the vehicle is in need of greater repair, or causes an accident.

Fraser

Posted by: Fraser

4 Responses to “Water & Flood Driving Advice”

  1. I’d also say keep your vision much closer to your car than usual. Years ago I hit water and the backpressure on my exhaust blew the head gasket because I was looking at the exit of the puddle and hadn’t slowed down enough to see how deep it was on my side, compared to the kerb.

    In the time I waited for help I had a great amount of time to re-check that height!

  2. I made a big mistake in driving the family Serena a 2.3 diesel into very deep water last Saturday 16th Aug. I got the bow wave going at the front but as the water got deeper the motor stalled. I did try to start it but it would not start. I did manage to get towed out, and tried to tow start the motor it seems to be locking the rear wheels it is rear wheel drive.
    Can anyone give good advice on what to do next.
    I have a little knowledge of cars.
    Regards Mark

  3. Hi Mark,

    You should always, where possible, avoid creating the bow wave - you don’t want to create a bow wave as it can swamp your exhaust and cause the engine to stall.

    Unfortunately, if your car is not coming back to life, then you may be in big trouble. It’s possible that the engine will require a complete strip down to remove any moisture.

    If you have been operating the car for a while you could well end up with a cracked catalytic converter too. Bad news.

    You could always try removing the spark plugs then turning the engine over as this may expel the water that’s causing a problem.

    Regards,

  4. car stall in flood water from Tropical Storm Fay. The car sounds if wants to turn over but it will not start. It is making a errrr sound when you try to starts. Please advise if need to dry out or have possibale damage the motor.

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