| rear main seal? ford 460? [message #98777] |
Mon, 06 September 2010 18:05  |
hertfordnc
Messages: 1164
Registered: September 2009
Location: East NC
Karma: 0
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Someone on the Revcon board mentioned using a rear main seal for a ford 460. Apparently a pretty common applictation?
What's the consensus here?
thanks
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| Re: [GMCnet] rear main seal? ford 460? [message #98789 is a reply to message #98777] |
Mon, 06 September 2010 19:38  |
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USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
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Dave,
The Ford rear main seal is rubber and can be installed in the 455. I bought
one and had it ready when I replaced the oil pan seal. When I checked the
area around the rear main seal I found it to be dry; in fact the cast iron
above it was RUSTY!
In keeping with "if it's not broke, don't fix it" I left well enough alone.
If you need to replace it use an oil pan seal from a Olds 350 Diesel engine,
unfortunately I can't find the part number in my folders.
Regards,
Rob M.
USAussie
-----Original Message-----
From: gmclist-bounces@temp.gmcnet.org
[mailto:gmclist-bounces@temp.gmcnet.org] On Behalf Of dave silva
Sent: Monday, September 06, 2010 7:06 PM
To: gmclist@temp.gmcnet.org
Subject: [GMCnet] rear main seal? ford 460?
Someone on the Revcon board mentioned using a rear main seal for a ford 460.
Apparently a pretty common applictation?
What's the consensus here?
thanks
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Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
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| Re: [GMCnet] rear main seal? ford 460? [message #98818 is a reply to message #98783] |
Tue, 07 September 2010 07:11 |
Jim Bounds
Messages: 842
Registered: January 2004
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I have had to battle with all sorts of mods that folks have added to the 455 and
here is what I have followed based on the "value added" theory. There are piles
of things to do, the problem is not figuring out which of them to use, the
problem is trying to figure out where to stop! I mean if you wanna keep
adding, how bout cutting a hole in the hood and popping a blower up on the
motor-- your HP and torque would be awesome-- but you would suck the dash cover
and your watch off pulling away from a traffic light!
Yes, Drew (my motor guru) did install 460 Ford rear main seals and did some
special fly cut thingy to the install-- when we went to duplicate the motor
build looking at "value added" features, the original rope seal sounded very
primitive but hey, if installed properly it worked vary well. My builders were
not willing to accept an "unexpected reprocussion" from bastardizing the Olds
motor with a Ford part. They could just see doing this then finding something
like after 6 hours of pounding used pulling 12,000 pounds that the seal did
something weird. No, they wanted to stick with proven, engineered result. To
date, we have had some problems just like anyone else in that we live in this
imperfect world but we have not had any rear main seal leaks and thats from the
rope seal OR from the dozen or so Koba motors we had built which use the 460
Ford rear main seal-- so I see no "added value" there.
There is a pile of other things like cam oil restrictors and other things. We
do use the thrust spacers and the end play button on the cams, the roller can
design we use all but require that configuration. Hey, there are just sooooo
many little things like that you must sort out, it's part of what makes a motor
special. There are just as many opinions on this as-- well yuo know so trying
to compile a list of them would be very frustrating so i would suggest just
letting that idea go away.
Anyway, there is not problem that I see making your motor a morphodite-- go for
it man!
Jim Bounds
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----- Original Message ----
From: Jim Wagner <slwjmw@sbcglobal.net>
To: gmclist@temp.gmcnet.org
Sent: Mon, September 6, 2010 7:50:00 PM
Subject: Re: [GMCnet] rear main seal? ford 460?
The October Car Craft mag.has a story on an Olds 455 build using the 460 Ford
rear seal. It also mentions the cam bearing restrictors. Tight rod side
clearance was also mentioned.
Jim Wagner
Brook Park, oh
Someone on the Revcon board mentioned using a rear main seal for a ford 460.
Apparently a pretty common applictation?
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| Re: [GMCnet] rear main seal? ford 460? [message #98822 is a reply to message #98818] |
Tue, 07 September 2010 07:33 |
hertfordnc
Messages: 1164
Registered: September 2009
Location: East NC
Karma: 0
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It wasn't for me. My Revcon does not appear to have any rear main leaks and I am not looking for trouble.
A lot of the Revcon folks are stuck sharing a limited amount of information with an ever shrinking number of people while the folks here have well established solutions to every issue related to the 455.
I try to be a liaison.
Thanks
Dave & Ellen Silva
Hertford, NC
76 Birchaven, 1-ton and other stuff
Currently planning the Great american Road Trip Summer 2021
It's gonna take a lot of Adderall to get this thing right.
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| Re: [GMCnet] rear main seal? ford 460? [message #98849 is a reply to message #98818] |
Tue, 07 September 2010 10:49 |
Richard Denney
Messages: 920
Registered: April 2010
Karma: 9
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On Tue, Sep 7, 2010 at 8:11 AM, Jim Bounds <gmccoop@yahoo.com> wrote:
> Anyway, there is not problem that I see making your motor a morphodite-- go
> for
> it man!
>
>
Gee whiz, Jim. I understand the need to keep to engineered solutions, and
the need for someone selling engines to stick with proven practices. But the
Ford rear seal is the exact same size as the slot it goes in, and it
designed for a shaft of the same diameter. We overthink a lot of things, to
be sure, but this seems to me a no-brainer.
I don't understand the special "fly-cut", by the way. As I recall, Kelvin
was able to install this seal without removing more than the rear main cap.
Rick "Oldsmobile engines went away in the late 70's, so every new part is a
morphodite" Denney
--
'73 230 "Jaws"
Northern Virginia
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| Re: rear main seal? ford 460? [message #98851 is a reply to message #98777] |
Tue, 07 September 2010 12:37 |
roy1
Messages: 2126
Registered: July 2004
Location: Minden nevada
Karma: 6
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Senior Member |
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I'll throw in my 2 cents. I have done around 6 or so 455 engines and had no problems with rear main leaks using the Ford seal except my current engine. The first 500 or so miles no problem then all hell broke loose the rear seal leaked like a sieve (1 quart in 500 miles). For the next 2,000 miles it was just an annoying leak . At 3,000 it is just a bit of a drip. I have my fingers crossed that it will stop leaking altogether. My thought was that the Knurl that is on the olds crankshaft to help lubricate the rope seal may be affecting the Ford seals ability to seal.Just my thoughts. It would not be fun to do what is necessary to remove the pan and replace the seal.
Roy
Roy Keen
Minden,NV
76 X Glenbrook
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