A top mechanic has issued a crucial warning to road users (Image: Getty)
A top has urged motorists to never make this simple error when starting their or car this December.
Leading mechanic Scotty Kilmer has stressed road users by accidentally trying to start the engine while it’s already running.
Pressing the key into the ignition and trying to turn it on when the car is active known as the flywheel.
This piece helps the engine run smoothly by storing rotational energy to power the vehicle.
However, making the simple error with motorists likely having to remove half their vehicle to replace it.
Flywheel damage can cause cars to ‘stall or shut off’ (Image: Getty)
, Scotty said: “Today I’m going to show you how not to start your car.
“Most cars are designed to just start, turn the key, start, you don’t have to do anything. They are all fuel-injected. You don’t want to touch the accelerator, it doesn’t need touching.
“And if you forgot that your car is running, do not turn the key to start it again. Now doing so won’t instantly destroy your car.
“The starters are built smartly enough of course the original ones weren’t, they would burn out.”
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Scotty added: “If the cars already started and then you hit the starter again as that bendix drive pops out, it’s going to mash against the spin and flywheel and make horrible noises.
“Now that’s not a good thing. If you do it many times, the gear on the starter and the bendix drive will start getting chipped. But that’s the least of your worries because starters don’t cost that much they can be easily replaced.
“That’s not the case for the flywheel. It bolts to the back of the engine. If you start chipping the teeth off on a flywheel, you’ve got to pull either the engine or the transmission out in order to replace the flywheel. A gigantic pain in the rear end job.”
, the average cost of replacing a flywheel in the UK is around £875 in what could be a major blow to cash-strapped road users.
Average costs tend to vary between £650 and £1,200 depending on the model and the scale of the repair work.
The experts suggests motorists should secure a flywheel replacement as soon as possible with the motorists at risk of breaking down if the tool is faulty.
ClickMechanic commented: “While you may technically be able to drive with a bad flywheel it is recommended not to do so.
“A broken or damaged flywheel can cause the vehicle to stall or shut off, leaving you stranded. Furthermore, driving with a damaged flywheel can cause further damage resulting in higher costs involved in fixing the issue.”