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If the engine is runningat high revs and (or) the flood is very deep the engine will hydraulic; thismeans that following the induction of water on the compression stroke, theengine will lock up as water cannot be compressed.
Occasionally, this willcause further issues such as bent con-rods, the risk of which increases if thedriver then attempts to crank or start the engine.
If mechanical damage suchas this occurs then it isn't a problem that can be repaired roadside.
WHAT TO DO IF FLOODSTALLED?
1. Never Crank the engine. This can easilycause more expensive damage.
2. Remove all induction components i.e. airfilter box, air metering devices and all air ducting and disconnect injectors(electrically)
3. Remove Spark Plugs (Petrol engines) orGlow Plugs (Diesel engines)
4. Dismantle as required to allow water toescape from throttle body and inlet manifold.
5. Reverse step 4
6. Crank engine by hand to check timing
7. Crank engine with throttle pedal fullydepressed until all water is ejected; but beware of high pressure water beingejected from combustion chambers. Reconnect Injectors
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8. Re-fit one spark or glow plug and crankagain. The engine should ?cough?.
9. Re-fit second spark or glow plug andcrank again. The engine will ?cough? and may even run.
10. Re-fit third spark or glow plug and crankagain. The engine will probably run.
11. Re-fit the fourth plug and crank again.The engine should run.
12. Ensure all induction components are dryand re-fit using a NEW air filter.
13. Start engine. It should run normally ifthe engine hunts (faltering revs) the air flow sensor is suspect.
14. Change the oil and oil filter. Mil lightmay be on so code clearing may be required.
15. Sell the car quickly!
For five, six and eightcylinder engines, the process is the same just repeated for each cylinder.
We hope this informationis helpful. Please call