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replacement engine
Posted: Mon Dec 10, 2001 1:24 pm
by steve.fielder@talk21.com
Hi to all
my `47 TC has recieved a replacement engine number XPAG A71853. On the offside of the block there is another plate bearing the following information;
Morris Motors Replacement Engine
Bore Size +040"
Crank Size R2
Shop 1
The bore size is self explanatory but what does "R2" and "Shop 1" denote if anything?
All answers greatfully received
Steve Fielder
TC4219
--------------------
talk21 your FREE portable and private address on the net at
http://www.talk21.com
Re: replacement engine
Posted: Mon Dec 10, 2001 1:38 pm
by Jennifer and Hugh Pite
Hi Steve, R2 refers to the crankshaft grind. In your case it is .5mm
undersize. (approx. 0.010").
I do not know "Shop 1" means, altho' it is probable the MG shop number where
the motor was reconditioned.
Best Regards, Hugh
----- Original Message -----
From: steve.fielder@talk21.com>
To: mg-tabc@yahoogroups.com>
Sent: Monday, December 10, 2001 1:18 PM
Subject: [mg-tabc] replacement engine
>
> Hi to all
>
> my `47 TC has recieved a replacement engine number XPAG A71853. On the
offside of the block there is another plate bearing the following
information;
>
> Morris Motors Replacement Engine
> Bore Size +040"
> Crank Size R2
> Shop 1
>
> The bore size is self explanatory but what does "R2" and "Shop 1" denote
if anything?
>
> All answers greatfully received
>
> Steve Fielder
> TC4219
>
>
>
> --------------------
> talk21 your FREE portable and private address on the net at
http://www.talk21.com
>
>
>
>
>
> Your use of Yahoo! Groups is subject to
http://docs.yahoo.com/info/terms/
>
>
Re: replacement engine
Posted: Mon Dec 10, 2001 1:52 pm
by Jennifer and Hugh Pite
Oops, that should be approx. 0.020" undersize and not 0.010".
Hugh
----- Original Message -----
From: Jennifer and Hugh Pite jenntoo@shaw.ca>
To: steve.fielder@talk21.com>
Cc: mg-tabc@yahoogroups.com>
Sent: Monday, December 10, 2001 1:38 PM
Subject: Re: [mg-tabc] replacement engine
> Hi Steve, R2 refers to the crankshaft grind. In your case it is .5mm
> undersize. (approx. 0.010").
> I do not know "Shop 1" means, altho' it is probable the MG shop number
where
> the motor was reconditioned.
> Best Regards, Hugh
>
> ----- Original Message -----
> From: steve.fielder@talk21.com>
> To: mg-tabc@yahoogroups.com>
> Sent: Monday, December 10, 2001 1:18 PM
> Subject: [mg-tabc] replacement engine
>
>
> >
> > Hi to all
> >
> > my `47 TC has recieved a replacement engine number XPAG A71853. On the
> offside of the block there is another plate bearing the following
> information;
> >
> > Morris Motors Replacement Engine
> > Bore Size +040"
> > Crank Size R2
> > Shop 1
> >
> > The bore size is self explanatory but what does "R2" and "Shop 1" denote
> if anything?
> >
> > All answers greatfully received
> >
> > Steve Fielder
> > TC4219
> >
> >
> >
> > --------------------
> > talk21 your FREE portable and private address on the net at
>
http://www.talk21.com
> >
> >
> >
> >
> >
> > Your use of Yahoo! Groups is subject to
http://docs.yahoo.com/info/terms/
> >
> >
>
>
>
>
>
> Your use of Yahoo! Groups is subject to
http://docs.yahoo.com/info/terms/
>
>
Re: replacement engine
Posted: Mon Dec 10, 2001 4:29 pm
by Locktc7440@aol.com
No idea what the R2 stands for but I have an XPAG with an RS designation
which I have never been able to come up with an answer for. Anyone know???
Re: replacement engine
Posted: Mon Dec 10, 2001 4:59 pm
by Chip Old
On Mon, 10 Dec 2001
Locktc7440@aol.com wrote:
> No idea what the R2 stands for but I have an XPAG with an RS
> designation which I have never been able to come up with an answer
> for. Anyone know???
RS = Standard unground crankshaft (2.047 in. main, 1.772 in. rod)
R1 = First regrind diameter (2.027 in. main, 1.752 in. rod)
R2 = Second regrind diameter (2.007 in. main, 1.732 in. rod)
Note that those sizes are in 0.020 in. increments. Today we're
accustomed to bearings (and regrinds) sized in 0.010 inch increments.
--
Chip Old 1948 M.G. TC TC6710 XPAG7430 NEMGTR #2271
Cub Hill, Maryland 1962 Triumph TR4 CT3154LO CT3479E
fold@bcpl.net
Re: replacement engine
Posted: Mon Dec 10, 2001 5:08 pm
by David and Joyce Edgar
>No idea what the R2 stands for but I have an XPAG with an RS designation
>which I have never been able to come up with an answer for. Anyone know???
I heard that R2 indicates Rod journal is .020 undersize. RS would be
standard. If the mains were done then there would be an "M"
desigantion also. Again, this is only what I have heard and have no
proof that it is fact. Would seem strange to me the factory would
grind the rod journals but not do the mains just to give a fresh
surface.
David Edgar, TC 5108
El Cajon, California
Re: replacement engine
Posted: Mon Dec 10, 2001 6:04 pm
by Jennifer and Hugh Pite
According to the TD/F workshop manual R2 refers to .5 mm undersize on both
rods and mains. This is about .020" undersize. There is no mention of a
"M" designation in the manual. It appears the factory rebuilt motors were
ground to the same amount undersize on both rods and mains (R4 is 1.00 mm
undersize). Why on earth anyone would grind the mains as a matter of course
when they do not need it is beyond me.
I just looked at my "Y" manual which has: Standard, R1- .3mm, R2- .5mm,
R3A- .75mm, R4- 1.00mm, and R4A- 1.25mm. As in the TD/F manual there is no
mention of the mains and rod journals being ground to different undersize.
Hugh Pite in stormy B.C.
----- Original Message -----
From: David and Joyce Edgar djedgar@pacbell.net>
To: T-ABC list mg-tabc@yahoogroups.com>
Sent: Monday, December 10, 2001 5:08 PM
Subject: Re: [mg-tabc] replacement engine
> >No idea what the R2 stands for but I have an XPAG with an RS designation
> >which I have never been able to come up with an answer for. Anyone
know???
>
> I heard that R2 indicates Rod journal is .020 undersize. RS would be
> standard. If the mains were done then there would be an "M"
> desigantion also. Again, this is only what I have heard and have no
> proof that it is fact. Would seem strange to me the factory would
> grind the rod journals but not do the mains just to give a fresh
> surface.
>
> David Edgar, TC 5108
> El Cajon, California
>
>
>
>
> Your use of Yahoo! Groups is subject to
http://docs.yahoo.com/info/terms/
>
>
>