Re: [Chrysler300] harmonic balancer rebuild

[Gary Nelson <Gary@xxxx>]

Hi Gang
I am a few days late in response to damper trouble. I had to get my damper 
out to get photos then Bob set me up with URL on club site so those 
interested my view my 392 damper fix,(harmonic balancer).

I owned a 300C in 61 and experienced damper hub walk off. On my current 
300C restoration I am correcting the damper problem as shown in the 5 
photos using the URL shown below.
The photos have text in them to help understand what is going on in each 
photo. I will add some text here to complete what is not shown in photos.

1) First thing you will want to do before removing damper is to find exact 
top dead center and transfer that to both inner and outer hubs. If anybody 
requests I can do a photo shoot detailing the procedure to accomplish that.

2) The damper is pressed apart.
3) 3 groves are machined into each hub,(see photo). This is what keeps them 
from walking apart
after the casting urethane is in place.
4) I machine a precision locating fixture that precisely holds the inner 
and outer hubs concentric and correct relationship to each other.(not shown 
in photos).
5) The damper is placed front down on the fixture. Part of the fixture has 
a ring that seals off the gap as you fill the gap from back side it will 
not run out plus leaves a smooth surface when cured due to the machined ring.
6) The last two photos show where I applied new degree marks. To do this I 
made a skin pass in the lath to give me a fresh surface to start new degree 
marks. This is optional and some may think it is a overkill. That's fussy 
me. I have the luxury of having a complete machine shop in my business and 
I just tell my tool and die maker, do this do that and it gets done. Some 
times he puts me off a while.

I would have to charge $135 to due all excluding new degree marks. Most of 
the work is in setting up and doing the machine work. I don't make money at 
this price and not looking for the work. If I can help then that's what I 
try to do.

View photos here.
www.chrysler300club.com/rcmstuff/gnharm/harm.html

Gary, The Parts Doc




> Date: Sun, 26 May 2002 20:03:00 -0500
> Subject: Re: [Chrysler300] harmonic balancer rebuild
>
> George and Rose wrote:
>
> > Hi all,
> > On the subject of rebuilding harmonic balancers, I have got to tell 
> you being off a couple of degrees on timing is not your primary 
> concern. I have had the rings come loose on two occasions, both were 392 
> engines, luckily I wasn't to far from home either time.
> > Regards,
> > George Cann
>
> And it makes a HUGE racket when you are driving and that happens.
>
> I stoped at a repair place nad had to have it removed before
> I got home from a trip once because of just this.
>
> Once you get your "new" damper, I suggest you mark the front
> of it with a mark (I used a white paint line) on the hub AND
> the ring part. That way you can see when it starts to slip.
>
> --
> Paul Holmgren