How to Identify and Fix Common Problems ?
Our sources include academic articles, blog posts, and personal essays from experienced technical support :
“Riding” the clutch is the most common reason for premature clutch failure. Even the slightest pressure on the pedal will partially disengage the clutch, causing the release bearing, pressure plate and flywheel to overheat.
Symptoms of an improperly adjusted clutch or problems with the clutch linkage may include a stiff clutch pedal, clutch slippage, premature wear of the throw-out bearing, gear clash when shifting, or a clutch that won`t release.
With a sudden breakdown, the clutch ceases to work entirely and the car won`t move. With gradual failure, you may experience problems such as the car not stopping when you press the pedal. Sudden failure is most often caused by a broken or loose clutch cable, linkable or a failed hydraulic master/slave cylinder.
Slip, judder, drag on spain and fierceness are the four main clutch faults, which are considered briefly as follows.
A clutch that sticks can cause grinding noises or can keep your vehicle from going into gear while a clutch pedal that is stuck to the floor renders your vehicle undriveable. If either of these situations happens to you, a trip to your mechanic is in order.
With the engine still off, press the clutch as far down as it goes then release it. A clutch that is in good condition should spring back to its original position quickly and have some resistance as you press down. On the other hand, if it gets stuck, moves slowly or feels bouncy then it`s likely to be wearing out.
A clutch works with two rotating shafts — one that is typically driven by a motor or pulley and one that drives another device. The clutch connects the two shafts so they can either be locked together and spin at the same speed, or be decoupled and spin at different speeds.
Clutch drag occurs when the clutch does not fully disengage the engine when the clutch pedal is depressed and can result in a noisy gear change or difficulty in engaging first and or reverse gears. Clutch drag can be caused by a damaged clutch or clutch mechanism such as a worn clutch cable.
There are two basic ways a clutch fails – it either fails to disengage, or fails to engage fully.
On most cars a clutch consists of 3 main parts; the pressure plate, the friction plate and the thrust bearing.
If your clutch slips, you will also lose power. Your engine will be revving high but your wheels won`t be moving forward. A slipping clutch is a sign that the clutch needs to be replaced. Again, the clutch is responsible for the power transfer between the engine and the transmission and back to the engine.
A clutch pressure plate is the spring-loaded plate bolted to the flywheel that applies pressure to a clutch disc or discs. When you press the clutch pedal, it compresses the pressure plate springs. Once the springs begin to compress, it releases the clutch disc allowing it to spin freely.
Generally speaking, most clutches will last for around 60,000 miles – but this can vary from as little as 30,000 miles to as much as 100,000 miles. This can depend on many factors, and not all of them are possible to control.
Because they have to withstand constant friction, clutches will tend to wear down on their own – a typical clutch lifespan is somewhere in the region of 60,000 miles, although some may last up to 100,000 and others start to give out at nearer 30,000.