Just thought I would let you know I've had my ring gear rotated!!!

 

Anyone make sense of this, apparently my ring gear was looking a little worse for wear in three places but instead of renewal my local nissan trained garage has advised rotating it so although not the ideal solution it should be much better. (only screeched a few times in the last six months)

 

From what I can see this means the ring gear seems to stop in the same three places. Please correct me if I'm wrong so rotating a few degrees should help extra life!!!!!!!

 

No "sounds painful" replies please :D

sounds painfull :D

I assume 6 cyl engine, guessing a bit but therefore compresion stroke/max force on ring at 360/6= 60 degree intervals. Rotating the ring gear 60 degrees would result in using a previously (unused/less stressed) part of the ring gear.

Doesn't this mean removing the ring gear from the flywheel and rotating it end over end so that the face that was towards the flywheel is now towards the starter if that makes sense. I had this done on a car years ago and it means that the starter doesn't engage on worn teeth.

 

Phil

Originally posted by Peter Hood

I assume 6 cyl engine, guessing a bit but therefore compresion stroke/max force on ring at 360/6= 60 degree intervals. Rotating the ring gear 60 degrees would result in using a previously (unused/less stressed) part of the ring gear.

 

Its a 4 stroke - hence one power stroke every 2 revs. Therefore its actually divided by 3=120deg ;)

But the ring gear can stop at any point not necessarly at the end of a stroke!!!!!

 

Zedhot

Originally posted by zedhot

But the ring gear can stop at any point not necessarly at the end of a stroke!!!!!

 

Zedhot

 

engines usually stop on the compression stroke ;)

Yup so the starter pinion mostly gives the ring gear a kick in the same 3 bunches of teeth so to speak. The wear is spread a bit because it isnt in exactly the same place each time as was said already. So by taking it off and shifting round by 60 degrees you can present the starter pinion with teeth that have never been kicked before - good as new;) Clever these mechanics!

 

Once its engaged it'll ride thru the rough spots no problem. Plus a zed usually starts on half a turn.

 

And you dont turn the gear over only round a bit as there will be chamfers on the side the pinion gear meshes into.

Good timing as my Zed is back from the garage today for me to see the benefits!!

 

All they did was remove the ring gear and rotate it 60 degrees as mentioned above. It now uses effectively new teeth to crank the engine as the previous three places it used to stop in were pretty knackered. I thought my starter motor was duff but turns out it's fine!!!

 

Only really spotted this mind as the engine was out having 2 new turbo's fitted, 5 minute job when it's out.