[Mg-t] original or revised seal kit

[Lawrie]

Ron,

The 433-415 kit was superseded because it assumed the crankshaft was in 
the exact original location. Most engines, when rebuilt properly, have 
the main bearing saddles line-honed or even line-bored, which almost 
always slightly shifts the position of the crankshaft. The 433-415 seal 
retainer positioned the seal relative to the original centerline so, if 
the line-boring moved the crank more than a few thousandths, the seal 
would not sit properly on the flange. One engine I rebuilt had the crank 
so far off-center that the seal was completely flattened on one side and 
not touching the other side of the flange!

This led to a re-design of the kit which allowed the seal retainer to 
"float" before being properly centered with a special alignment tool 
(included in the kit), as well as a comprehensively revised set of 
instructions which include precise details of how to position everything 
correctly and pictures of each step. Unfortunately, the 433-415 
components cannot be modified to be the equivalent of a 433-421 kit.

So far, the revisions seem to have made the Moss kit into an excellent 
fix for rear engine leaks, based on the fact that reported leaks and 
complaints about difficulty of installation have dwindled to almost zero.

(And, FWIW, last time I checked, the kit sold by B&G in England is a 
direct copy of the 433-415 kit.)

Lawrie

> Mike,
>
> The seal kit I used appears to be the old Moss kit (part number 433-415). This
> kit seems to be no longer available.  What was changed between this kit and
> the new revised 433-421 kit?  Is the new kit better than the one I used?  Does
> anyone know if the kit I have can be modified to make it the new style or I
> would have to replace it completely?
>
> Ronald Olds
>
> Ronald Olds
>
> -----Original Message-----
> From: mg-t-bounces at autox.team.net [mailto:mg-t-bounces at autox.team.net] On
> Behalf Of Duvall Video Productions
> Sent: Wednesday, September 18, 2013 2:05 PM
> To: mg-t at autox.team.net
> Subject: [Mg-t] original or revised seal kit
>
> Ron,  Did you install the old or the revised Moss kit?
>
> On Sep 18, 2013, at 1:00 PM, mg-t-request at autox.team.net wrote:
>
>> -----Original Message-----
>> From: mg-t-bounces at autox.team.net [mailto:mg-t-bounces at autox.team.net]
>> On Behalf Of Ron Olds
>> Sent: Sunday, September 15, 2013 7:05 AM
>> To: wbeech at flash.net; mg-t at autox.team.net
>> Subject: Re: [Mg-t] TD Engine Pull
>>
>> I have a small leak from my engine as well after rebuilding and
>> installing
> the
>> Moss seal.  I have not disassembled anything to see where the drip is
> coming
>> from.  Can someone tell me if the flywheel can be removed with the
> crankshaft
>> installed?
>>
>> Ronald Olds
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