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  • Hydraulic Release Bearing - Measuring Clutch Gap

Hydraulic Release Bearing - Measuring Clutch Gap

The most important step when installing a clutch with a hydraulic release bearing is to measure the gap between the throwout bearing and the clutch fingers. Most clutches call for a maximum gap of 1/16" to 1/8". A common mistake is to allow too much gap or too little gap. Do it once, do it right!

Mistake: Not enough gap

If you have too little gap, the throw out bearing will constantly be wearing the fingers of the pressure plate. In extreme cases, it can keep pressure against the fingers and not allow the clutch to fully release which will allow the clutch to constantly slip and wear out your clutch!

Mistake: Too much gap

When you have too much gap, the hyrdaulic release bearing can over-extend with the pedal travel, and actually blow the seal in the bearing. Make sure you do not have too much gap, if you over extend the bearing it will have to be rebuilt! Most times when this happens it destroys the o-rings in the bearing so you definitely want to avoid that!

Throw length!

Another important thing to note is the overall throw (forward movement) of your slave cylinder. This can be effected by the travel length of your clutch pedal, as well as the bore size of your master cylinder. If you have too much fluid volume in the master cylinder, and too much throw, you can over-extend the pressure plate fingers and bend them. Too much throw can also can over-extend the slave cylinder, blowing the seal which is something you want to avoid! 

Here is a video of a GR1000 kit install with a Triple disc clutch by Jay @ Real Street Performance