Originally Posted by uk_mouse
Don't confuse the starter sprag clutch with the torque limiter.
The sprag clutch is the "cage and rollers" thing that allows the starter to turn the engine but freewheels in the other direction (ie the engine doesn't turn the starter). If this fails, the starter will just spin and the engine won't turn when you press the button.
If the old style torque limiter fails, you get the "clack clack" symptoms, the starter still doesn't turn the engine but it's a different part that needs to be replaced.
So what does the limiter actually do..........does it act as a shock absorber when starting? I shall have to get my spare cover out for a good look and refresher course!