MikeLR
|
| posted on 14/2/08 at 02:32 PM |
|
|
Starter ring
Just a cautionary post. The starter ring has become separated from the flywheel on my Tiger. It was heat shrunk on, probably needed to be tack welded
as well.
With a bit of luck this should be able to be done insitu.
Is this a common problem ?
Mike
|
|
|
|
|
Mr Whippy
|
| posted on 14/2/08 at 02:39 PM |
|
|
don't tack weld, the ring is hardend and will be damaged from the heat of the welds making it more likely to shatter at speed.
Put the new ring in the oven at it's maximum heat and then place it quickly on to the flywheel. Let cool naturally.
|
|
|
coozer
|
| posted on 14/2/08 at 02:40 PM |
|
|
The ring will be far to hard to get a weld on without crystallisation. Be careful!
1972 V8 Jago
1980 Z750
|
|
|
nib1980
|
| posted on 14/2/08 at 02:54 PM |
|
|
not to mention potentially unbalancing the flywheels, an shafting your engine
|
|
|
speedyxjs
|
| posted on 14/2/08 at 03:11 PM |
|
|
quote:
Originally posted by Mr Whippy
don't tack weld, the ring is hardend and will be damaged from the heat of the welds making it more likely to shatter at speed.
Put the new ring in the oven at it's maximum heat and then place it quickly on to the flywheel. Let cool naturally.
Dont forget the oven gloves 
How long can i resist the temptation to drop a V8 in?
|
|
|
r1_pete
|
| posted on 14/2/08 at 03:18 PM |
|
|
quote:
Originally posted by Mr Whippy
don't tack weld, the ring is hardend and will be damaged from the heat of the welds making it more likely to shatter at speed.
Thats good cos I feared I'd caught mine re-drilling the clutch bolt holes....
|
|
|
Mr Whippy
|
| posted on 14/2/08 at 03:57 PM |
|
|
quote:
Originally posted by r1_pete
quote:
Originally posted by Mr Whippy
don't tack weld, the ring is hardend and will be damaged from the heat of the welds making it more likely to shatter at speed.
Thats good cos I feared I'd caught mine re-drilling the clutch bolt holes....
To remove a starter ring a small hole is drilled in it and then a blow with a chisel cracks the ring open. So any damage to it by accident could cause
a future break up.
|
|
|
MikeLR
|
| posted on 14/2/08 at 05:47 PM |
|
|
Might just be opening a can of worms here !!
Have spoken to two engine tuners this afternoon and they both tack weld starter rings on, one said quote " we always tack weld in high
compression engines and large engines. four weld diagonaly opposite each other"
Is the disintigration of the ring more of a theoretical problem ? would it not more likely to break up on starting ? Has anyone had a ring break up
?
Thanks for your comments.
Getting near " make my mind up time " !!
Mike
|
|
|
MikeRJ
|
| posted on 14/2/08 at 06:01 PM |
|
|
The starter ring on my brothers ultra-light steel flywheel for his mini was tacked on which I wasn't overly impressed with. The welds cracked
anyway and the starter ring moved over jamming the starter so I suspect the flywheel was undersized for the starter ring in the first place.
|
|
|
Liam
|
| posted on 14/2/08 at 10:21 PM |
|
|
The ring gear that i've fitted to my custom ally flywheel was originally fitted to a torque converter flex plate rather than a flywheel since it
was from an auto. That was tack welded and that's a production car item.
In the world of ally flywheels, the most common way to retain the ring gear is with flange headed fastenings (or just dome heads with washers). The
fasteners are actually fitted to the flywheel shoulder but the heads/washers overlap onto the ring gear. Usually there is a counterbore that the
fastener is recessed into. This counterbore obviously takes a small notch out of the ring gear, but this doesn't seem to be a problem. This
stops the ring gear from both slipping round and walking off the shoulder.
Less common, but often seen is the method of TIG welding tabs onto the ring gear that fit into rebates in the shoulder of the flywheel. These tabs
are then bolted to the flywheel. Like the production item above this welding of the ring gear is obviously acceptable if done properly. In fact one
of the ally flywheels i've seen with the welded tabs ring gear retaining method is a production Ford Racing one for a Mustang Cobra. Still, my
preference would be the flange headed fastener method above.
What you certainly wont see is a hole drilled through a ring gear for a dowel or fastener.
Liam
|
|
|
