[Fot] 1147 Crank Seal

[Norlin Engineering]

Jay

What Andy has told you is accurate from what I know.  The scroll seal on the
early cranks worked just like the scroll seal on the front of the early
stock gearboxes.  What is normally done for racing is to have a sleeve made
from stainless steel to eliminate the scroll and bring the diameter out to
match the oil seal dimension of the later cranks.  If you don't want to do
this for some reason, I've probably got one or more of the old style "oil
retaining covers" buried in my stash of stuff.

Jim Norlin

-----Original Message-----
From: fot-bounces+norlinengineering=comcast.net at autox.team.net
[mailto:fot-bounces+norlinengineering=comcast.net at autox.team.net] On Behalf
Of Herald948 at aol.com
Sent: Wednesday, September 05, 2007 6:31 PM
To: jaxonracing at yahoo.com; fot at autox.team.net
Subject: Re: [Fot] 1147 Crank Seal


In a message dated 9/5/2007 8:37:25 P.M. Eastern Daylight Time,
jaxonracing at yahoo.com writes:

I  have located and purchased an 1147 crank for my race car, there is a
difference from the crank I had before in that on the flywheel end of the
crank
there is a "scroll" (looks like threads so as it rotates it returns oil
back
to the block) in the fat end.  It appears that this design would  "sling"
the
oil back into the block, but I am not sure of the purpose.

My question is, does this type of crank design use  the same rear seal as
the
crank without the "scroll"??? Or do I need a  different type of seal??


Jay, others will, I'm sure, be able to give you much more detail, but it
sounds like the crank you got is the earlier type and does indeed have the
"scroll" to fling the oil back into the engine. If I remember correctly,  it
has --
instead of an oil seal and its housing -- what the  spare parts catalogue
calls the "oil retaining cover -- rear." I also recall  that this crank was
used
until fairly late in the Mk2 Spitfires, then the later  crank was used
through
the early 1296 "small journal" blocks.

--Andy   Mace

*Mrs Irrelevant: Oh, is it a jet?
*Man: Well, no ... It's not  so  much of a jet, it's more your, er, Triumph
Herald engine with  wings.
-- Cut-price Airlines Sketch, Monty Python's Flying Circus   (22)

Check out the North American Triumph Sports 6 (Vitesse 6) and  Triumph
Herald
Database: _http://triumph-herald.us_ (http://triumph-herald.us/)




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