Richard Notton wrote:
> ----- Original Message -----
> From: "Stuart Ellis" <stuellis@mediaone.net>
> To: "Military Vehicles Mailing List" <mil-veh@mil-veh.org>
> Sent: Saturday, December 02, 2000 7:48 PM
> Subject: [MV] New Blazer problem
>
> > Replaced bendix around a month ago because of loud sound starter would
> make
> > while trying to start that I was told was bad Bendix. . . . . . . . .Drove
> it home and
> > tried starting in the driveway and it took twice, making the same sound
> the
> > first time and started the second time after normal cranking sound.
> > Any ideas what could be wrong now?
> >
> Yup.
>
> The Bendix gear is on the starter shaft itself and they rarely give much
> trouble, what does wear is the ring gear that is shrunk onto the flywheel.
> The engine will naturally stop in probably only a few positions, especially
> a diesel with huge compressions,
for what ever reason 6.2's tend to stop in 1 place all the time.
it plays hell on the ring gear when the starter plays up. (weak spring on the
bendix gear)
doesn't quite engage all the way, just grinds the ring gear.
> and these teeth of the relatively soft
> ring gear will get hammered.
>
CUCV 6.2 diesel is even easier, it uses a throw away flex plate with the teeth
on it.
down side is you have to slide the trany/transfer unit back about 6 to 8 inches
to change the plate.
>
> Cheat method (after taking off/out whatever you need to get the flywheel off
> !), just drill a large hole between the ring gear teeth and not deep enough
> to mark the flywheel than split it with a cold chisel.
>
> Put the new ring gear in a hot oven, gas mark 9/240 C/475 F for at least an
> hour (even hotter is better), put the flywheel in the deep-freeze overnight
> or longer.
>
> Be aware of the orientation on the ring gear, they often have a lead on the
> tooth face that faces the starter bendix gear. Get the flywheel near the
> oven, have a hammer handy (better yet have two people with hammers handy),
> whip the ring gear out and instantly pop it on the flywheel (the right way
> round) and encourage it to seat on its land by judicious hammer blows VERY
> QUICKLY if not sooner.
>
> If it gets cocked and temps stabilise you'll be splitting it off and getting
> another.
>
> Richard
> Southampton - England
>
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