Quote:
Originally Posted by BodhiBenz1987
I doubt that will lead to immediate catastrophic failure, but the washers go under the bolt heads for a reason,
|
Yes, indeed!, you’re absolutely right!, there is a very good reason for the washer to be either under the bolt head or the nut, whichever is resting directly onto the flex disk.
Very briefly, the six holes on the disk contains 2 sleeves (bosses) each. The outer one is “Vulcanised” to the rubber, the inner one is fit-pressed into the outer. When the bolt is tightened the washer actually pushes slightly the inner sleeve into the shaft/flange/yoke recess in the lobes and bridges the 2 sleeves to the metal disk thereby securing the flex disk onto the shat/flange/yoke.
If the new bolts supplied with the new disk are Allen socket type of bolts, the head of the bolt is not wider than the rim of the inner sleeve (even the hexagonal head bolt barely bridges the 2 sleeves) and without the washer to bridge the 2 sleeves onto the metal disk the bolt is not securing the flex disk but only the inner sleeve. Without that vital support of the washer the bolts could shear off as it happened to your original one when failed the support due to surrounding rubber deterioration. Even the shape of the sides of the washers are important in which way they face, as one side is flat (facing the flex disk) and the other has rounded edges (facing the nut/bolt).
The way I understand you installed the washers just under the nuts only, it means that theoretically you could pull the shaft and would come away from the yokes together with the flex disk attached to it (since those are the only bolts that are secured with the washers to the flex disk) leaving the 3 bolts and inner sleeves attached to the tranny’s yoke/flange and the same at the differential.
Bolt without washer
Bolt with washer
Hex without washer
Hex with washer
