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Author Topic: Filter cover oil leak  (Read 2448 times)

Jack Leis

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Re: Filter cover oil leak
« Reply #15 on: November 29, 2012, 12:00:37 AM »
More to be revealed Jim.
I would much rather ride a slow bike fast than a fast bike slow    Jack

Ducati Scotty

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Re: Filter cover oil leak
« Reply #16 on: November 29, 2012, 12:11:45 AM »
As I mentioned above, beefier is not better.
To work right, the O-ring must be the right size.

Too large of an inside diameter, too thick of a cross-section or both will doom it to failure.

+1.

mattsz

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Re: Filter cover oil leak
« Reply #17 on: November 29, 2012, 01:05:28 AM »
When I took delivery of my bike, I asked the dealer to bring along two oil filters and requisite o-rings.  He brought the filters, and a pair of rings that looked like they should fit the cap.  When we changed the oil the first time, it was apparent that this ring, while seemingly the correct overall diameter, was too "thick" in cross section to fit easily into the recess on the cap.  We reused the ring that was there, and I did the same again for the second oil change.  I have since gotten a slew of o-rings in the oil change kit from NFG - including what looks like rings to match the size installed.  You'd hope that the dealers would get it right...

gremlin

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Re: Filter cover oil leak
« Reply #18 on: November 29, 2012, 11:47:26 AM »
.............You'd hope that the dealers would get it right........

Hope in one hand & .........
1996 Trophy 1200
2011 RE B5
1979 XS11 w/vetter terraplane
1981 XS11 streetfighter
1983 Venture Royale
1982 CB750K
1971 Triumph Trident
1969 CB450
1966 Sears (puch) 250


Jack Leis

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Re: Filter cover oil leak
« Reply #19 on: November 29, 2012, 02:37:52 PM »
Hope in one hand & .........
    Plus One Gremlin !
I would much rather ride a slow bike fast than a fast bike slow    Jack

LarsBloodbeard

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Re: Filter cover oil leak
« Reply #20 on: November 29, 2012, 07:13:35 PM »
This forum is a hoot!  I've had an intermittent leak from that oil filter cover since I got the bike.  Last night I changed the oil & filter.  This time they gave me a new o-ring with it... well, I'll be darned if it isn't the correct size now.  I thought that old one looked a bit small in that groove!

Jack Leis

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Re: Filter cover oil leak
« Reply #21 on: November 29, 2012, 07:16:31 PM »
Thats what Im talking about. In my case, Nfield gear on the left, Hitchcock's on the right.
I would much rather ride a slow bike fast than a fast bike slow    Jack

Arizoni

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Re: Filter cover oil leak
« Reply #22 on: November 29, 2012, 07:33:21 PM »
Actually, the packing on the left looks to me to be the right size if it is a stretch fit on the inside diameter and it is protruding about .010 above the adjacent metal diameter of the cap.  The side to side clearance in the slot must have clearance.

The one on the right could be the right size but before installing it I would check to see it slips loosely down into the packing groove. It should clear the walls of the groove by about ten thousandths of an inch (3 pieces of printer paper).
If the Hitchcock one is a tight fit (side to side) it is the wrong one.
If the Hitchcock one is a loose fit (side to side) it probably is okay to use as long as it isn't sticking out above the adjacent metal cover diameter over .020".
Jim
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1999 Miata 10th Anniversary

Afro Samurai

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Re: Filter cover oil leak
« Reply #23 on: November 29, 2012, 07:37:15 PM »
Guys.. Guys.. its a brit bike.. if it doesnt leak oil.. how can you tell if it works?.. ha.. ha... dont get mad at me...

Just did my oil change.. with parts from nfield gear... now I am worried... will have to check when I get back...

I bought a slew of orings.. from mcmastercarr.com  .. all diff sizes.. anybody got any measurements on the oring size that wont leak?.. surely a metric size?.. or standard size?... looks like I need to make a call to parker oring.. and get something speacial out fo stock.. one of those "x" cross section types...

ok... somebody just answered part of my questions.. thanks Arizoni

LarsBloodbeard

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Re: Filter cover oil leak
« Reply #24 on: November 29, 2012, 07:46:06 PM »
Thats what Im talking about. In my case, Nfield gear on the left, Hitchcock's on the right.

The one on the left was in the bike when I got it, the one on the right was from Doug Douglass.  I've bought 2 filters from them, the first had no o-ring, the second had 2 o-rings.

The cap slipped on very easily (loosely) with the old one.

mattsz

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Re: Filter cover oil leak
« Reply #25 on: November 29, 2012, 08:35:37 PM »
Lars-

I can't tell much from your photo, but those rings look kind of like what I had.  Only, the slighter one, like the one on the left, was what was installed and fit fine, and didn't leak.  The beefier one, like on the right, was supplied from the dealer, along with the filters, and it didn't fit - it was just a hair too big...

LarsBloodbeard

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Re: Filter cover oil leak
« Reply #26 on: November 30, 2012, 12:34:54 AM »
Without a micrometer, it's hard to compare yours to mine.  But like I said, the cap was a loose fit.  Also there was plenty of room in that o-ring channel.  The larger one looks more correct to me.  Time will tell if the leak is gone...

Jack Leis

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Re: Filter cover oil leak
« Reply #27 on: November 30, 2012, 02:29:20 AM »
 The first time I ever changed my filter I bought one that came with a cap o-ring from Art at Douglas and it never leaked. He spoiled me ! I bought the "big kit" from Nfield gear and that's when the problems started. As you stated Lars, time will tell.
I would much rather ride a slow bike fast than a fast bike slow    Jack

singhg5

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Re: Filter cover oil leak
« Reply #28 on: November 30, 2012, 03:53:04 AM »
I had measured the size of these O-rings with a caliper and came up with numbers in the picture below. I would say these are the best estimates - may not be absolute numbers.

Smallest one =  9mm id  and 13mm od
Middle one   =  35mm id and 42mm od
Large one     =  42mm id  and 48mm od

I must say that it is not so easy to accurately measure because O-ring changes shape with slightest pressure and readings change. Even while measuring thickness, it can compress easily and give different values.
« Last Edit: November 30, 2012, 04:03:18 AM by singhg5 »
1970's Jawa /  Yezdi
2006 Honda Nighthawk
2009 Royal Enfield Black G5

singhg5

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Re: Filter cover oil leak
« Reply #29 on: November 30, 2012, 03:54:20 AM »
These are pictures of one of the O-rings in caliper.

1970's Jawa /  Yezdi
2006 Honda Nighthawk
2009 Royal Enfield Black G5