| Author | Message | ||
     T9r |
On the crankshaft under the cam cover the Inner race that has the retaining ring attached to it, is allowed to rotate on the shaft and even slide out on the crankshaft. Is is suppose to be allowed to do this?  | ||
| Buelldyno_guy |
The right side is normally called the pinion shaft and it's bearing is the pinion bearing. The snap ring should be tight in the shaft and prevents movement between the shaft and bearing. I have never seen what you point out, but would be interested on knowing if the (left side) engine shaft nut was loose? On XB's side play is controlled by a thrust washer under the engine seal. There is a new (higher) torque value do to it coming loose. If it did, the side play could drive the pinion side to work on the bearing retaining snap ring. ... Just an idea of what I would look for. ... Terry | ||
| Blake |
Which might also just lead to an oil pump drive gear failure. Hmmmm... Not too much different than the effects of excessive runout on that pinion shaft eh Terry? | ||
| Buelldyno_guy |
Blake I am sure the oil pump gear would go soon if there was too much side play. I would love to see this up close and real. ... So T9r, please keep us informed to what they find as the root cause. ... Terry | ||
| Sokota |
waiting.......this could move the checking of the sprocket nut into a must do category. I am still having trouble accepting 260 ft lbs on the crankshaft nut ,seems like engine vibration might pop the nut off due to shear tension produced. Somewhat related question : is it possible to bleed off lifters to remove tension off cams when removing cam cover? turning motor over a few times with no oil pump? | ||
| T9r |
I pulled the primary cover off and the nut was still on and seamingly tight. I will reinstall a new nut and torque to new specs. | ||
| Buelldyno_guy |
While it's off check the side play before you replace the nut. ... Terry | ||
| T9r |
Yes there is 0.041 inches of end play (side play) on the pinion shaft. How much is allowable? What should I do now? (Message edited by t9r on July 23, 2006) | ||
| T9r |
I have yet to find end play tolerances values, in the manual. I did read that the inner race is pressed onto the pinion shaft... needless to say the inner race was allowed to slide on the pinion shaft with ease. SO why/how did the inner race become unpressed from the pinion shaft? | ||
| T9r |
The retaining ring is a snap ring. The ring fits into a groove on the inner race. | ||
| Sokota |
Seems like the pinion nut would keep everything in check , but it is a press fit from factory. Deleted other post to spare future confusion. Not in there first hand ,stepping back to read and learn . | ||
| T9r |
There is a gap between the end of the inner race and where the oil pump drive gear fits onto the pinion shaft. The gap is about 1/4". The pinion nut really only keeps the oil pump drive gear and the pinion gear in place as I see it. | ||
| Hobanbrothers |
That flywheel assembly needs to come out, & like Terry has said, I have not seen that issue either. Usually the outer race will walk out of the case, but the pinion shaft race is .002 - .003 interfearance fit and should never do that. They can be replaced, but my fear here would be that the pinion shaft itself has been comprimised and allowed the race to walk out? Hopefully not... | ||
| T9r |
Should the outer race be flush with the case? The outer race is not flush with the case. The outer race comes out 1/8" past the case. I will see how difficult the new inner race will be to install before pulling the flywheel assembly out. I'll look at the photos of the pinion shaft I took tomorrow. (Message edited by t9r on July 25, 2006) |
